Re: [mapserver-users] Offset values from database
Would it not be possible to draw the polygon as 2 different polygons (the inner polygon the outer using the postgis functions)? You could specify a fixed offset for one or the other. On the other hand, if you just have 1 polygon (with a single line, so no inner polygons) and you're trying to accomplish a visual effect that the inside of the polygon lies further away, i would accomplish this by drawing a thicker border. Or you could possibly use the asymmetric line drawing functions that are available. Maybe give a more concrete example of what exactly you are trying to do. On 12 August 2010 22:46, Bob Basques bob.basq...@ci.stpaul.mn.us wrote: All, Wondering, would this work for INSIDE/OUTSIDE situations with regard to polygon drawing? Or is the left/right sides of the line strictly relying on the from/to aspects of how the polygon was drawn (clockwise/counterclockwise) This would be handy for off-setting to (ONLY) the inside of a polygon for example. Thanks bobb Wim Vanbelle wimvanbe...@gmail.com wrote: Thank you very much everyone. And especially Thomas. That was indeed what I was looking for. You saved me a lot of work! Much appreciated. On 12 August 2010 17:50, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Thanks Thomas That looks nice in my test example. David. -Original Message- From: thomas bonfort [mailto:thomas.bonf...@gmail.com] Sent: Thursday, August 12, 2010 10:45 AM To: Fawcett, David (MPCA) Cc: Wim Vanbelle; mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database the -99 is a special offset value that shifts the line as you are looking for. style color 255 0 0 offset -2 -99 width 2 end style color 0 255 0 offset 2 -99 width 2 end not perfect as there are artifacts on sharp angles, but worth a try. regards, thomas On Thu, Aug 12, 2010 at 16:56, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, You can do these offsets in pixel values at a class level, just not a feature level. This pretty much does what you are describing, although it gets a little funky when the lines are diagonal and not straight. CLASS STYLE COLOR 0 0 0 WIDTH 2 END STYLE COLOR 255 0 0 WIDTH 2 OFFSET 10 10 END STYLE COLOR 0 255 0 WIDTH 2 OFFSET -10 -10 END END David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 9:32 AM To: mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database Maybe this pic helps elaborate on what i'm trying to accomplish: http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png It should be noted that the distance between the 2 (new) lines, should be a fixed value over the zoomlevels. It must not be the case that at the furthest zoomlevel the lines are further apart. I've looked all over for this, but never really found a proper solution. I tried cartographic symbol drawing, but it only draws on the same side every time. Maybe I'm just doing it wrong :). On 12 August 2010 16:28, Wim Vanbelle wimvanbe...@gmail.com wrote: Hello, thanks for your feedback. The issue with this, is that the underlying linestrings (the 2 that would lie on top of eachother), have different colors :(. So they have to be moved apart from one another. I have not found a way to do this with asymmetric line drawing either, as it will always offset to the same side. This is why i would need the offset value to be configurable in the database. I could select a different pixel offset for each line and they would always appear next to eachtoher (no matter what zoomlevel). I can elaborate on the problem more if I am a little too confusing ! On 12 August 2010 16:20, Cristiano Sumariva sumar...@gmail.com wrote: If it is a display problem why not try create some special symbology to overlap one line with another using different symbol strokes. So the user will se that are 2 lines overlayed. 2010/8/12 Wim Vanbelle wimvanbe...@gmail.com Hi David, I read that documentation before though. I was hoping it just hadn't been updated... Is this possibly a feature for 6.0 ? Are there any other ways how one could offset a feature in pixels, rather than in lat/long coords? Maybe I should elaborate on the original problem a little. Consider 2 line segments that lie above one another. The general idea is to 'offset' them a given x , y value, so they will both display next to one another, rather than on top of eachother. If you would however perform this code simply on lat/long values, it would imply, that when scaling your map at the most detailed zoom level, the lines would lie very far apart, and when zoomed out, they would appear
Re: [mapserver-users] Offset values from database
I would like to shade the inside of a polygon along it's border. Using the polygon border as the edge. Making wider lines means offsetting the poygon internally or putting up with the edge not being specifically accurate. bobb Wim Vanbelle wimvanbe...@gmail.com wrote: Would it not be possible to draw the polygon as 2 different polygons (the inner polygon the outer using the postgis functions)? You could specify a fixed offset for one or the other. On the other hand, if you just have 1 polygon (with a single line, so no inner polygons) and you're trying to accomplish a visual effect that the inside of the polygon lies further away, i would accomplish this by drawing a thicker border. Or you could possibly use the asymmetric line drawing functions that are available. Maybe give a more concrete example of what exactly you are trying to do. On 12 August 2010 22:46, Bob Basques bob.basq...@ci.stpaul.mn.us wrote: All, Wondering, would this work for INSIDE/OUTSIDE situations with regard to polygon drawing? Or is the left/right sides of the line strictly relying on the from/to aspects of how the polygon was drawn (clockwise/counterclockwise) This would be handy for off-setting to (ONLY) the inside of a polygon for example. Thanks bobb Wim Vanbelle wimvanbe...@gmail.com wrote: Thank you very much everyone. And especially Thomas. That was indeed what I was looking for. You saved me a lot of work! Much appreciated. On 12 August 2010 17:50, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Thanks Thomas That looks nice in my test example. David. -Original Message- From: thomas bonfort [mailto:thomas.bonf...@gmail.com] Sent: Thursday, August 12, 2010 10:45 AM To: Fawcett, David (MPCA) Cc: Wim Vanbelle; mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database the -99 is a special offset value that shifts the line as you are looking for. style color 255 0 0 offset -2 -99 width 2 end style color 0 255 0 offset 2 -99 width 2 end not perfect as there are artifacts on sharp angles, but worth a try. regards, thomas On Thu, Aug 12, 2010 at 16:56, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, You can do these offsets in pixel values at a class level, just not a feature level. This pretty much does what you are describing, although it gets a little funky when the lines are diagonal and not straight. CLASS STYLE COLOR 0 0 0 WIDTH 2 END STYLE COLOR 255 0 0 WIDTH 2 OFFSET 10 10 END STYLE COLOR 0 255 0 WIDTH 2 OFFSET -10 -10 END END David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 9:32 AM To: mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database Maybe this pic helps elaborate on what i'm trying to accomplish: http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png It should be noted that the distance between the 2 (new) lines, should be a fixed value over the zoomlevels. It must not be the case that at the furthest zoomlevel the lines are further apart. I've looked all over for this, but never really found a proper solution. I tried cartographic symbol drawing, but it only draws on the same side every time. Maybe I'm just doing it wrong :). On 12 August 2010 16:28, Wim Vanbelle wimvanbe...@gmail.com wrote: Hello, thanks for your feedback. The issue with this, is that the underlying linestrings (the 2 that would lie on top of eachother), have different colors :(. So they have to be moved apart from one another. I have not found a way to do this with asymmetric line drawing either, as it will always offset to the would always appear next to eachtoher (no matter what zoomlevel). I can elaborate on the problem more if I am a little too confusing ! On 12 August 2010 16:20, Cristiano Sumariva sumar...@gmail.com wrote: If it is a display problem why not try create some special symbology to overlap one line with another using different symbol strokes. So the user will se that are 2 lines overlayed. 2010/8/12 Wim Vanbelle wimvanbe...@gmail.com Hi David, I read that documentation before though. I was hoping it just hadn't been updated... Is this possibly a feature for 6.0 ? Are there any other ways how one could offset a feature in pixels, rather than in lat/long coords? Maybe I should elaborate on the original problem a little. Consider 2 line segments that lie above one another. The general idea is to 'offset' them a given x , y value, so they will both display next to one another, rather than on top of eachother. If you would however perform this code simply on lat/long values, it would imply, that when scaling your map at the most detailed zoom level, the lines would lie very far apart, and when zoomed out, they would appear to lie on top of eachother. I
[mapserver-users] Offset values from database
Hi, I'm trying to load offset X, Y data from the postgis database. Each feature has an offset value defined there. My mapfile (relevant part) looks like this: In the layer: DATAgeom_mercator from map_links using unique Id using SRID=900913 STYLE WIDTH 6 COLOR 0 255 0 ANTIALIAS TRUE ANGLE AUTO OFFSET [offsetX] [offsetY] END Please don't tell me the offsetX, Y values cannot be read from the database. That would be a huge issue for me. Thank you for your time. Best regards ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
RE: [mapserver-users] Offset values from database
Wim, If you don’t want me to tell you, you will likely want to look at the mapfile documentation at: http://mapserver.org/mapfile/style.html [Spoiler Alert] You can’t use values from an attribute table to set the value of this property [/Spoiler Alert] David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 5:48 AM To: mapserver-users@lists.osgeo.org Subject: [mapserver-users] Offset values from database Hi, I'm trying to load offset X, Y data from the postgis database. Each feature has an offset value defined there. My mapfile (relevant part) looks like this: In the layer: DATAgeom_mercator from map_links using unique Id using SRID=900913 STYLE WIDTH 6 COLOR 0 255 0 ANTIALIAS TRUE ANGLE AUTO OFFSET [offsetX] [offsetY] END Please don't tell me the offsetX, Y values cannot be read from the database. That would be a huge issue for me. Thank you for your time. Best regards ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Offset values from database
Hi David, I read that documentation before though. I was hoping it just hadn't been updated... Is this possibly a feature for 6.0 ? Are there any other ways how one could offset a feature in pixels, rather than in lat/long coords? Maybe I should elaborate on the original problem a little. Consider 2 line segments that lie above one another. The general idea is to 'offset' them a given x , y value, so they will both display next to one another, rather than on top of eachother. If you would however perform this code simply on lat/long values, it would imply, that when scaling your map at the most detailed zoom level, the lines would lie very far apart, and when zoomed out, they would appear to lie on top of eachother. I find it hard to believe that I would need to pre calculate all the data in order to obtain geometry objects for each zoom level. Maybe some veterans have some good insight in this :). On 12 August 2010 15:26, Fawcett, David (MPCA) david.fawc...@state.mn.uswrote: Wim, If you don’t want me to tell you, you will likely want to look at the mapfile documentation at: http://mapserver.org/mapfile/style.html [Spoiler Alert] You can’t use values from an attribute table to set the value of this property [/Spoiler Alert] David. *From:* mapserver-users-boun...@lists.osgeo.org [mailto: mapserver-users-boun...@lists.osgeo.org] *On Behalf Of *Wim Vanbelle *Sent:* Thursday, August 12, 2010 5:48 AM *To:* mapserver-users@lists.osgeo.org *Subject:* [mapserver-users] Offset values from database Hi, I'm trying to load offset X, Y data from the postgis database. Each feature has an offset value defined there. My mapfile (relevant part) looks like this: In the layer: DATAgeom_mercator from map_links using unique Id using SRID=900913 STYLE WIDTH 6 COLOR 0 255 0 ANTIALIAS TRUE ANGLE AUTO OFFSET [offsetX] [offsetY] END Please don't tell me the offsetX, Y values cannot be read from the database. That would be a huge issue for me. Thank you for your time. Best regards ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Offset values from database
Maybe this pic helps elaborate on what i'm trying to accomplish: http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png It should be noted that the distance between the 2 (new) lines, should be a fixed value over the zoomlevels. It must not be the case that at the furthest zoomlevel the lines are further apart. I've looked all over for this, but never really found a proper solution. I tried cartographic symbol drawing, but it only draws on the same side every time. Maybe I'm just doing it wrong :). On 12 August 2010 16:28, Wim Vanbelle wimvanbe...@gmail.com wrote: Hello, thanks for your feedback. The issue with this, is that the underlying linestrings (the 2 that would lie on top of eachother), have different colors :(. So they have to be moved apart from one another. I have not found a way to do this with asymmetric line drawing either, as it will always offset to the same side. This is why i would need the offset value to be configurable in the database. I could select a different pixel offset for each line and they would always appear next to eachtoher (no matter what zoomlevel). I can elaborate on the problem more if I am a little too confusing ! On 12 August 2010 16:20, Cristiano Sumariva sumar...@gmail.com wrote: If it is a display problem why not try create some special symbology to overlap one line with another using different symbol strokes. So the user will se that are 2 lines overlayed. 2010/8/12 Wim Vanbelle wimvanbe...@gmail.com Hi David, I read that documentation before though. I was hoping it just hadn't been updated... Is this possibly a feature for 6.0 ? Are there any other ways how one could offset a feature in pixels, rather than in lat/long coords? Maybe I should elaborate on the original problem a little. Consider 2 line segments that lie above one another. The general idea is to 'offset' them a given x , y value, so they will both display next to one another, rather than on top of eachother. If you would however perform this code simply on lat/long values, it would imply, that when scaling your map at the most detailed zoom level, the lines would lie very far apart, and when zoomed out, they would appear to lie on top of eachother. I find it hard to believe that I would need to pre calculate all the data in order to obtain geometry objects for each zoom level. Maybe some veterans have some good insight in this :). On 12 August 2010 15:26, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, If you don’t want me to tell you, you will likely want to look at the mapfile documentation at: http://mapserver.org/mapfile/style.html [Spoiler Alert] You can’t use values from an attribute table to set the value of this property [/Spoiler Alert] David. *From:* mapserver-users-boun...@lists.osgeo.org [mailto: mapserver-users-boun...@lists.osgeo.org] *On Behalf Of *Wim Vanbelle *Sent:* Thursday, August 12, 2010 5:48 AM *To:* mapserver-users@lists.osgeo.org *Subject:* [mapserver-users] Offset values from database Hi, I'm trying to load offset X, Y data from the postgis database. Each feature has an offset value defined there. My mapfile (relevant part) looks like this: In the layer: DATAgeom_mercator from map_links using unique Id using SRID=900913 STYLE WIDTH 6 COLOR 0 255 0 ANTIALIAS TRUE ANGLE AUTO OFFSET [offsetX] [offsetY] END Please don't tell me the offsetX, Y values cannot be read from the database. That would be a huge issue for me. Thank you for your time. Best regards ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
RE: [mapserver-users] Offset values from database
Wim, You can do these offsets in pixel values at a class level, just not a feature level. This pretty much does what you are describing, although it gets a little funky when the lines are diagonal and not straight. CLASS STYLE COLOR 0 0 0 WIDTH 2 END STYLE COLOR 255 0 0 WIDTH 2 OFFSET 10 10 END STYLE COLOR 0 255 0 WIDTH 2 OFFSET -10 -10 END END David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 9:32 AM To: mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database Maybe this pic helps elaborate on what i'm trying to accomplish: http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png It should be noted that the distance between the 2 (new) lines, should be a fixed value over the zoomlevels. It must not be the case that at the furthest zoomlevel the lines are further apart. I've looked all over for this, but never really found a proper solution. I tried cartographic symbol drawing, but it only draws on the same side every time. Maybe I'm just doing it wrong :). On 12 August 2010 16:28, Wim Vanbelle wimvanbe...@gmail.commailto:wimvanbe...@gmail.com wrote: Hello, thanks for your feedback. The issue with this, is that the underlying linestrings (the 2 that would lie on top of eachother), have different colors :(. So they have to be moved apart from one another. I have not found a way to do this with asymmetric line drawing either, as it will always offset to the same side. This is why i would need the offset value to be configurable in the database. I could select a different pixel offset for each line and they would always appear next to eachtoher (no matter what zoomlevel). I can elaborate on the problem more if I am a little too confusing ! On 12 August 2010 16:20, Cristiano Sumariva sumar...@gmail.commailto:sumar...@gmail.com wrote: If it is a display problem why not try create some special symbology to overlap one line with another using different symbol strokes. So the user will se that are 2 lines overlayed. 2010/8/12 Wim Vanbelle wimvanbe...@gmail.commailto:wimvanbe...@gmail.com Hi David, I read that documentation before though. I was hoping it just hadn't been updated... Is this possibly a feature for 6.0 ? Are there any other ways how one could offset a feature in pixels, rather than in lat/long coords? Maybe I should elaborate on the original problem a little. Consider 2 line segments that lie above one another. The general idea is to 'offset' them a given x , y value, so they will both display next to one another, rather than on top of eachother. If you would however perform this code simply on lat/long values, it would imply, that when scaling your map at the most detailed zoom level, the lines would lie very far apart, and when zoomed out, they would appear to lie on top of eachother. I find it hard to believe that I would need to pre calculate all the data in order to obtain geometry objects for each zoom level. Maybe some veterans have some good insight in this :). On 12 August 2010 15:26, Fawcett, David (MPCA) david.fawc...@state.mn.usmailto:david.fawc...@state.mn.us wrote: Wim, If you don’t want me to tell you, you will likely want to look at the mapfile documentation at: http://mapserver.org/mapfile/style.html [Spoiler Alert] You can’t use values from an attribute table to set the value of this property [/Spoiler Alert] David. From: mapserver-users-boun...@lists.osgeo.orgmailto:mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.orgmailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 5:48 AM To: mapserver-users@lists.osgeo.orgmailto:mapserver-users@lists.osgeo.org Subject: [mapserver-users] Offset values from database Hi, I'm trying to load offset X, Y data from the postgis database. Each feature has an offset value defined there. My mapfile (relevant part) looks like this: In the layer: DATAgeom_mercator from map_links using unique Id using SRID=900913 STYLE WIDTH 6 COLOR 0 255 0 ANTIALIAS TRUE ANGLE AUTO OFFSET [offsetX] [offsetY] END Please don't tell me the offsetX, Y values cannot be read from the database. That would be a huge issue for me. Thank you for your time. Best regards ___ mapserver-users mailing list mapserver-users@lists.osgeo.orgmailto:mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Offset values from database
the -99 is a special offset value that shifts the line as you are looking for. style color 255 0 0 offset -2 -99 width 2 end style color 0 255 0 offset 2 -99 width 2 end not perfect as there are artifacts on sharp angles, but worth a try. regards, thomas On Thu, Aug 12, 2010 at 16:56, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, You can do these offsets in pixel values at a class level, just not a feature level. This pretty much does what you are describing, although it gets a little funky when the lines are diagonal and not straight. CLASS STYLE COLOR 0 0 0 WIDTH 2 END STYLE COLOR 255 0 0 WIDTH 2 OFFSET 10 10 END STYLE COLOR 0 255 0 WIDTH 2 OFFSET -10 -10 END END David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 9:32 AM To: mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database Maybe this pic helps elaborate on what i'm trying to accomplish: http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png It should be noted that the distance between the 2 (new) lines, should be a fixed value over the zoomlevels. It must not be the case that at the furthest zoomlevel the lines are further apart. I've looked all over for this, but never really found a proper solution. I tried cartographic symbol drawing, but it only draws on the same side every time. Maybe I'm just doing it wrong :). On 12 August 2010 16:28, Wim Vanbelle wimvanbe...@gmail.com wrote: Hello, thanks for your feedback. The issue with this, is that the underlying linestrings (the 2 that would lie on top of eachother), have different colors :(. So they have to be moved apart from one another. I have not found a way to do this with asymmetric line drawing either, as it will always offset to the same side. This is why i would need the offset value to be configurable in the database. I could select a different pixel offset for each line and they would always appear next to eachtoher (no matter what zoomlevel). I can elaborate on the problem more if I am a little too confusing ! On 12 August 2010 16:20, Cristiano Sumariva sumar...@gmail.com wrote: If it is a display problem why not try create some special symbology to overlap one line with another using different symbol strokes. So the user will se that are 2 lines overlayed. 2010/8/12 Wim Vanbelle wimvanbe...@gmail.com Hi David, I read that documentation before though. I was hoping it just hadn't been updated... Is this possibly a feature for 6.0 ? Are there any other ways how one could offset a feature in pixels, rather than in lat/long coords? Maybe I should elaborate on the original problem a little. Consider 2 line segments that lie above one another. The general idea is to 'offset' them a given x , y value, so they will both display next to one another, rather than on top of eachother. If you would however perform this code simply on lat/long values, it would imply, that when scaling your map at the most detailed zoom level, the lines would lie very far apart, and when zoomed out, they would appear to lie on top of eachother. I find it hard to believe that I would need to pre calculate all the data in order to obtain geometry objects for each zoom level. Maybe some veterans have some good insight in this :). On 12 August 2010 15:26, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, If you don’t want me to tell you, you will likely want to look at the mapfile documentation at: http://mapserver.org/mapfile/style.html [Spoiler Alert] You can’t use values from an attribute table to set the value of this property [/Spoiler Alert] David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 5:48 AM To: mapserver-users@lists.osgeo.org Subject: [mapserver-users] Offset values from database Hi, I'm trying to load offset X, Y data from the postgis database. Each feature has an offset value defined there. My mapfile (relevant part) looks like this: In the layer: DATA geom_mercator from map_links using unique Id using SRID=900913 STYLE WIDTH 6 COLOR 0 255 0 ANTIALIAS TRUE ANGLE AUTO OFFSET [offsetX] [offsetY] END Please don't tell me the offsetX, Y values cannot be read from the database. That would be a huge issue for me. Thank you for your time. Best regards
RE: [mapserver-users] Offset values from database
Thanks Thomas That looks nice in my test example. David. -Original Message- From: thomas bonfort [mailto:thomas.bonf...@gmail.com] Sent: Thursday, August 12, 2010 10:45 AM To: Fawcett, David (MPCA) Cc: Wim Vanbelle; mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database the -99 is a special offset value that shifts the line as you are looking for. style color 255 0 0 offset -2 -99 width 2 end style color 0 255 0 offset 2 -99 width 2 end not perfect as there are artifacts on sharp angles, but worth a try. regards, thomas On Thu, Aug 12, 2010 at 16:56, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, You can do these offsets in pixel values at a class level, just not a feature level. This pretty much does what you are describing, although it gets a little funky when the lines are diagonal and not straight. CLASS STYLE COLOR 0 0 0 WIDTH 2 END STYLE COLOR 255 0 0 WIDTH 2 OFFSET 10 10 END STYLE COLOR 0 255 0 WIDTH 2 OFFSET -10 -10 END END David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 9:32 AM To: mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database Maybe this pic helps elaborate on what i'm trying to accomplish: http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png It should be noted that the distance between the 2 (new) lines, should be a fixed value over the zoomlevels. It must not be the case that at the furthest zoomlevel the lines are further apart. I've looked all over for this, but never really found a proper solution. I tried cartographic symbol drawing, but it only draws on the same side every time. Maybe I'm just doing it wrong :). On 12 August 2010 16:28, Wim Vanbelle wimvanbe...@gmail.com wrote: Hello, thanks for your feedback. The issue with this, is that the underlying linestrings (the 2 that would lie on top of eachother), have different colors :(. So they have to be moved apart from one another. I have not found a way to do this with asymmetric line drawing either, as it will always offset to the same side. This is why i would need the offset value to be configurable in the database. I could select a different pixel offset for each line and they would always appear next to eachtoher (no matter what zoomlevel). I can elaborate on the problem more if I am a little too confusing ! On 12 August 2010 16:20, Cristiano Sumariva sumar...@gmail.com wrote: If it is a display problem why not try create some special symbology to overlap one line with another using different symbol strokes. So the user will se that are 2 lines overlayed. 2010/8/12 Wim Vanbelle wimvanbe...@gmail.com Hi David, I read that documentation before though. I was hoping it just hadn't been updated... Is this possibly a feature for 6.0 ? Are there any other ways how one could offset a feature in pixels, rather than in lat/long coords? Maybe I should elaborate on the original problem a little. Consider 2 line segments that lie above one another. The general idea is to 'offset' them a given x , y value, so they will both display next to one another, rather than on top of eachother. If you would however perform this code simply on lat/long values, it would imply, that when scaling your map at the most detailed zoom level, the lines would lie very far apart, and when zoomed out, they would appear to lie on top of eachother. I find it hard to believe that I would need to pre calculate all the data in order to obtain geometry objects for each zoom level. Maybe some veterans have some good insight in this :). On 12 August 2010 15:26, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, If you don’t want me to tell you, you will likely want to look at the mapfile documentation at: http://mapserver.org/mapfile/style.html [Spoiler Alert] You can’t use values from an attribute table to set the value of this property [/Spoiler Alert] David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 5:48 AM To: mapserver-users@lists.osgeo.org Subject: [mapserver-users] Offset values from database Hi, I'm trying to load offset X, Y data from the postgis database. Each feature has an offset value defined there. My mapfile (relevant part) looks like this: In the layer: DATA geom_mercator from map_links using unique Id using SRID=900913 STYLE WIDTH 6 COLOR 0 255 0
Re: [mapserver-users] Offset values from database
Thank you very much everyone. And especially Thomas. That was indeed what I was looking for. You saved me a lot of work! Much appreciated. On 12 August 2010 17:50, Fawcett, David (MPCA) david.fawc...@state.mn.uswrote: Thanks Thomas That looks nice in my test example. David. -Original Message- From: thomas bonfort [mailto:thomas.bonf...@gmail.com] Sent: Thursday, August 12, 2010 10:45 AM To: Fawcett, David (MPCA) Cc: Wim Vanbelle; mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database the -99 is a special offset value that shifts the line as you are looking for. style color 255 0 0 offset -2 -99 width 2 end style color 0 255 0 offset 2 -99 width 2 end not perfect as there are artifacts on sharp angles, but worth a try. regards, thomas On Thu, Aug 12, 2010 at 16:56, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, You can do these offsets in pixel values at a class level, just not a feature level. This pretty much does what you are describing, although it gets a little funky when the lines are diagonal and not straight. CLASS STYLE COLOR 0 0 0 WIDTH 2 END STYLE COLOR 255 0 0 WIDTH 2 OFFSET 10 10 END STYLE COLOR 0 255 0 WIDTH 2 OFFSET -10 -10 END END David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 9:32 AM To: mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database Maybe this pic helps elaborate on what i'm trying to accomplish: http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png It should be noted that the distance between the 2 (new) lines, should be a fixed value over the zoomlevels. It must not be the case that at the furthest zoomlevel the lines are further apart. I've looked all over for this, but never really found a proper solution. I tried cartographic symbol drawing, but it only draws on the same side every time. Maybe I'm just doing it wrong :). On 12 August 2010 16:28, Wim Vanbelle wimvanbe...@gmail.com wrote: Hello, thanks for your feedback. The issue with this, is that the underlying linestrings (the 2 that would lie on top of eachother), have different colors :(. So they have to be moved apart from one another. I have not found a way to do this with asymmetric line drawing either, as it will always offset to the same side. This is why i would need the offset value to be configurable in the database. I could select a different pixel offset for each line and they would always appear next to eachtoher (no matter what zoomlevel). I can elaborate on the problem more if I am a little too confusing ! On 12 August 2010 16:20, Cristiano Sumariva sumar...@gmail.com wrote: If it is a display problem why not try create some special symbology to overlap one line with another using different symbol strokes. So the user will se that are 2 lines overlayed. 2010/8/12 Wim Vanbelle wimvanbe...@gmail.com Hi David, I read that documentation before though. I was hoping it just hadn't been updated... Is this possibly a feature for 6.0 ? Are there any other ways how one could offset a feature in pixels, rather than in lat/long coords? Maybe I should elaborate on the original problem a little. Consider 2 line segments that lie above one another. The general idea is to 'offset' them a given x , y value, so they will both display next to one another, rather than on top of eachother. If you would however perform this code simply on lat/long values, it would imply, that when scaling your map at the most detailed zoom level, the lines would lie very far apart, and when zoomed out, they would appear to lie on top of eachother. I find it hard to believe that I would need to pre calculate all the data in order to obtain geometry objects for each zoom level. Maybe some veterans have some good insight in this :). On 12 August 2010 15:26, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, If you don’t want me to tell you, you will likely want to look at the mapfile documentation at: http://mapserver.org/mapfile/style.html [Spoiler Alert] You can’t use values from an attribute table to set the value of this property [/Spoiler Alert] David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 5:48 AM To: mapserver-users@lists.osgeo.org Subject: [mapserver-users] Offset values from database Hi, I'm
Re: [mapserver-users] Offset values from database
All, Wondering, would this work for INSIDE/OUTSIDE situations with regard to polygon drawing? Or is the left/right sides of the line strictly relying on the from/to aspects of how the polygon was drawn (clockwise/counterclockwise) This would be handy for off-setting to (ONLY) the inside of a polygon for example. Thanks bobb Wim Vanbelle wimvanbe...@gmail.com wrote: Thank you very much everyone. And especially Thomas. That was indeed what I was looking for. You saved me a lot of work! Much appreciated. On 12 August 2010 17:50, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Thanks Thomas That looks nice in my test example. David. -Original Message- From: thomas bonfort [mailto:thomas.bonf...@gmail.com] Sent: Thursday, August 12, 2010 10:45 AM To: Fawcett, David (MPCA) Cc: Wim Vanbelle; mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database the -99 is a special offset value that shifts the line as you are looking for. style color 255 0 0 offset -2 -99 width 2 end style color 0 255 0 offset 2 -99 width 2 end not perfect as there are artifacts on sharp angles, but worth a try. regards, thomas On Thu, Aug 12, 2010 at 16:56, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, You can do these offsets in pixel values at a class level, just not a feature level. This pretty much does what you are describing, although it gets a little funky when the lines are diagonal and not straight. CLASS STYLE COLOR 0 0 0 WIDTH 2 END STYLE COLOR 255 0 0 WIDTH 2 OFFSET 10 10 END STYLE COLOR 0 255 0 WIDTH 2 OFFSET -10 -10 END END David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 9:32 AM To: mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Offset values from database Maybe this pic helps elaborate on what i'm trying to accomplish: http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png It should be noted that the distance between the 2 (new) lines, should be a fixed value over the zoomlevels. It must not be the case that at the furthest zoomlevel the lines are further apart. I've looked all over for this, but never really found a proper solution. I tried cartographic symbol drawing, but it only draws on the same side every time. Maybe I'm just doing it wrong :). On 12 August 2010 16:28, Wim Vanbelle wimvanbe...@gmail.com wrote: Hello, thanks for your feedback. The issue with this, is that the underlying linestrings (the 2 that would lie on top of eachother), have different colors :(. So they have to be moved apart from one another. I have not found a way to do this with asymmetric line drawing either, as it will always offset to the same side. This is why i would need the offset value to be configurable in the database. I could select a different pixel offset for each line and they would always appear next to eachtoher (no matter what zoomlevel). I can elaborate on the problem more if I am a little too confusing ! On 12 August 2010 16:20, Cristiano Sumariva sumar...@gmail.com wrote: If it is a display problem why not try create some special symbology to overlap one line with another using different symbol strokes. So the user will se that are 2 lines overlayed. 2010/8/12 Wim Vanbelle wimvanbe...@gmail.com Hi David, I read that documentation before though. I was hoping it just hadn't been updated... Is this possibly a feature for 6.0 ? Are there any other ways how one could offset a feature in pixels, rather than in lat/long coords? Maybe I should elaborate on the original problem a little. Cons ider 2 line segments that lie If you would however perform this code simply on lat/long values, it would imply, that when scaling your map at the most detailed zoom level, the lines would lie very far apart, and when zoomed out, they would appear to lie on top of eachother. I find it hard to believe that I would need to pre calculate all the data in order to obtain geometry objects for each zoom level. Maybe some veterans have some good insight in this :). On 12 August 2010 15:26, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: Wim, If you don’t want me to tell you, you will likely want to look at the mapfile documentation at: http://mapserver.org/mapfile/style.html [Spoiler Alert] You can’t use values from an attribute table to set the value of this property [/Spoiler Alert] David. From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim Vanbelle Sent: Thursday, August 12, 2010 5:48 AM To: mapserver-users@lists.osgeo.org Subject: [mapserver-users] Offset values from database Hi, I'm trying to load offset X, Y data from the postgis database. Each feature has an offset value defined there. My mapfile
