Re: [mapserver-users] MapServer Symbol Conversion from Polyline Points
Precise symbol placement is among the issues that are being addressed in RFC45 (Symbology, Labeling, and Cartography Improvements) http://mapserver.osgeo.org/development/rfc/ms-rfc-45.html> In RFC45, a new tag called CENTER or ORIGIN is proposed. ANCHORPOINT is perhaps a better name for it. This tag could be useful to have available both with the SYMBOL and with the STYLE. Cite from RFC45: CENTER/ORIGIN [x y] Defines the centre of the symbol using decimal pixels (x axis increasing to the right, y axis increasing downwards). * Is used for placing a point symbol on the map or on a “decorated” line * Defines the centre of rotation if an ANGLE is specified for point symbols. * Default value is the centre of the symbol’s bounding box. * Applies to TYPE ellipse, vector, pixmap, truetype. Håvard Tveite Bob Basques wrote: All, I would vote for both the 0,0 anchoring by default and the use of the ANCHORPOINT function. These things gave me no end of problems when I first started out with MapServer. Took a while to figure out how to anchor oddly shaped symbols for example. bobb As a side issue, do the positive/negative numbers have a bearing on the anchor point of the symbol or is that always in the centre of the symbol? as of now, the symbol is centered on the anchor point. I'd be in favor of having a way to specify the anchor point, either by fixing it on 0,0 , or by specifying it alongside the symbol, eg ANCHORPOINT 0.3 2 regards, thomas ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
RE: [mapserver-users] MapServer Symbol Conversion from Polyline Points
I believe the size is computed from the max x, y coordinates and 0,0. That size (and the Style size) is then used to offset the symbol so it is centered accordingly. Typically I always develop vector symbols on a unit square (0 to 1) so that things work predictably. As suggested later in this thread a TTF is a nice alternative for anything complex. I use 'FontCreator' and it works quite nicely. Steve >>> On 12/29/2008 at 6:58 AM, in message >>> , "Donald Kerr" wrote: > Thomas, > > Thanks for your prompt reply. > >>> If I take just part of the above then it still doesn't work: >>> >>> SYMBOL >>>NAME 'boulderGeometry' >>>TYPE VECTOR >>>FILLED FALSE >>>POINTS >>>-0.154 0.236 >>>-0.111 0.365 >>>-0.116 0.501 >>>-0.165 0.616 >>>-0.170 0.627 >>>END # POINTS >>> END # SYMBOL > >> There's a limitation with the vector code that expects all >> values to be positive when computing the symbol size. I'm >> hoping this will be fixed in 5.4 / 6.0 > > Is that the reason why the above appears not to work i.e. the size issue? I > will try changing everything to a positive number to see if that works. > > As a side issue, do the positive/negative numbers have a bearing on the > anchor point of the symbol or is that always in the centre of the symbol? > > Many thanks. > > Regards, > > Donald > > > ___ > 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] MapServer Symbol Conversion from Polyline Points
David, > Another potential solution would be to create a true type > font character and use that as your symbol. I gave up on trying to recreate the vector symbols and have been working away to create a font containing all the symbols (about 80 in total). This seems to work very well and provides a neat way of packaging them for use by others. Great suggestion! Many thanks. Regards, Donald ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] MapServer Symbol Conversion from Polyline Points
All, I would vote for both the 0,0 anchoring by default and the use of the ANCHORPOINT function. These things gave me no end of problems when I first started out with MapServer. Took a while to figure out how to anchor oddly shaped symbols for example. bobb > > As a side issue, do the positive/negative numbers have a bearing on the > anchor point of the symbol or is that always in the centre of the symbol? as of now, the symbol is centered on the anchor point. I'd be in favor of having a way to specify the anchor point, either by fixing it on 0,0 , or by specifying it alongside the symbol, eg ANCHORPOINT 0.3 2 regards, thomas ___ 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] MapServer Symbol Conversion from Polyline Points
> Another potential solution would be to create a true > type font character and use that as your symbol. That might be worth a try. I'll be working on this problem later today wo will give it a go and see how I get on. I also want to try getting the polyline points into a vector format just to satisfy myself that it can be done that way. The TTF solution might be a bit neater and easier. Many thanks. Regards, Donald ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
RE: [mapserver-users] MapServer Symbol Conversion from Polyline Points
Another potential solution would be to create a true type font character and use that as your symbol. -Original Message- From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of thomas bonfort Sent: Monday, December 29, 2008 7:06 AM To: Donald Kerr Cc: mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] MapServer Symbol Conversion from Polyline Points On Mon, Dec 29, 2008 at 13:58, Donald Kerr wrote: > Thomas, > > Thanks for your prompt reply. > >>> If I take just part of the above then it still doesn't work: >>> >>> SYMBOL >>>NAME 'boulderGeometry' >>>TYPE VECTOR >>>FILLED FALSE >>>POINTS >>>-0.154 0.236 >>>-0.111 0.365 >>>-0.116 0.501 >>>-0.165 0.616 >>>-0.170 0.627 >>>END # POINTS >>> END # SYMBOL > >> There's a limitation with the vector code that expects all values to >> be positive when computing the symbol size. I'm hoping this will be >> fixed in 5.4 / 6.0 > > Is that the reason why the above appears not to work i.e. the size > issue? I will try changing everything to a positive number to see if > that works. probably > > As a side issue, do the positive/negative numbers have a bearing on > the anchor point of the symbol or is that always in the centre of the > symbol? as of now, the symbol is centered on the anchor point. I'd be in favor of having a way to specify the anchor point, either by fixing it on 0,0 , or by specifying it alongside the symbol, eg ANCHORPOINT 0.3 2 regards, thomas ___ 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] MapServer Symbol Conversion from Polyline Points
On Mon, Dec 29, 2008 at 13:58, Donald Kerr wrote: > Thomas, > > Thanks for your prompt reply. > >>> If I take just part of the above then it still doesn't work: >>> >>> SYMBOL >>>NAME 'boulderGeometry' >>>TYPE VECTOR >>>FILLED FALSE >>>POINTS >>>-0.154 0.236 >>>-0.111 0.365 >>>-0.116 0.501 >>>-0.165 0.616 >>>-0.170 0.627 >>>END # POINTS >>> END # SYMBOL > >> There's a limitation with the vector code that expects all >> values to be positive when computing the symbol size. I'm >> hoping this will be fixed in 5.4 / 6.0 > > Is that the reason why the above appears not to work i.e. the size issue? I > will try changing everything to a positive number to see if that works. probably > > As a side issue, do the positive/negative numbers have a bearing on the > anchor point of the symbol or is that always in the centre of the symbol? as of now, the symbol is centered on the anchor point. I'd be in favor of having a way to specify the anchor point, either by fixing it on 0,0 , or by specifying it alongside the symbol, eg ANCHORPOINT 0.3 2 regards, thomas ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
RE: [mapserver-users] MapServer Symbol Conversion from Polyline Points
Thomas, Thanks for your prompt reply. >> If I take just part of the above then it still doesn't work: >> >> SYMBOL >>NAME 'boulderGeometry' >>TYPE VECTOR >>FILLED FALSE >>POINTS >>-0.154 0.236 >>-0.111 0.365 >>-0.116 0.501 >>-0.165 0.616 >>-0.170 0.627 >>END # POINTS >> END # SYMBOL > There's a limitation with the vector code that expects all > values to be positive when computing the symbol size. I'm > hoping this will be fixed in 5.4 / 6.0 Is that the reason why the above appears not to work i.e. the size issue? I will try changing everything to a positive number to see if that works. As a side issue, do the positive/negative numbers have a bearing on the anchor point of the symbol or is that always in the centre of the symbol? Many thanks. Regards, Donald ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] MapServer Symbol Conversion from Polyline Points
hi, On Mon, Dec 29, 2008 at 11:59, Donald Kerr wrote: > the maximum number of points that can be used by default it's 100. you can change the MS_MAXVECTORPOINTS constant in mapsymbol.h to change that limit. > and the highest positive/negative numbers that can be used. > I believe that "-99" works as 'pen up' but does that mean that -98 and 98 > are the maximum? -99 is the reserved value for penup, ie you can use -100 for the actual points. > Also, do the point values have to be integer values? If > not, how many numbers after the point e.g. 1.12345 etc. not necessarily integer. you can use as many numbers after the point as you wish > > If I take the polyline points like the following then the server throws a > CGI wobbly and needs restarting: > >-0.178,0.619 >END # POINTS > END # SYMBOL you've got a comma here, the parser can't recognize two numbers > > > If I take just part of the above then it still doesn't work: > > SYMBOL >NAME 'boulderGeometry' >TYPE VECTOR >FILLED FALSE >POINTS >-0.154 0.236 >-0.111 0.365 >-0.116 0.501 >-0.165 0.616 >-0.170 0.627 >END # POINTS > END # SYMBOL there's a limitation with the vector code that expects all values to be positive when computing the symbol size. I'm hoping this will be fixed in 5.4 / 6.0 regards, thomas ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
RE: [mapserver-users] MapServer Symbol Conversion from Polyline Points
Just to add a wee bit to this. I have a number of symbols that I would like to recreate in MapServer. I have an image of what they should look like and I have the arrays of polyline points. What I don't really know is the limitations of the MapServer vector points i.e. the maximum number of points that can be used and the highest positive/negative numbers that can be used. I believe that "-99" works as 'pen up' but does that mean that -98 and 98 are the maximum? Also, do the point values have to be integer values? If not, how many numbers after the point e.g. 1.12345 etc. If I take the polyline points like the following then the server throws a CGI wobbly and needs restarting: SYMBOL NAME 'boulderGeometry' TYPE VECTOR FILLED FALSE POINTS -0.154 0.236 -0.111 0.365 -0.116 0.501 -0.165 0.616 -0.170 0.627 -0.264 0.724 -0.490 0.826 -0.682 0.889 -0.885 0.900 -1.083 0.858 -1.264 0.767 -1.415 0.631 -1.521 0.466 -1.558 0.199 -1.538 -0.071 -1.462 -0.329 -1.333 -0.566 -1.156 -0.771 -99 -99 1.755 -0.819 1.534 -0.804 0.832 -0.857 0.129 -0.824 -0.450 -0.769 -1.032 -0.767 -1.612 -0.819 -99 -99 1.640 -0.804 1.620 -0.589 1.392 -0.388 1.122 -0.248 -99 -99 0.311 -0.526 0.520 -0.573 0.732 -0.554 0.930 -0.472 1.093 -0.335 1.097 -0.329 1.101 -0.323 1.105 -0.317 1.108 -0.311 1.111 -0.304 1.113 -0.298 1.115 -0.291 1.117 -0.284 1.118 -0.277 1.118 -0.270 1.119 -0.263 1.118 -0.256 1.118 -0.249 1.117 -0.242 1.115 -0.235 1.113 -0.229 1.111 -0.222 1.108 -0.216 1.105 -0.209 1.101 -0.203 1.097 -0.198 1.093 -0.192 1.088 -0.187 1.083 -0.182 1.078 -0.177 1.073 -0.173 1.067 -0.169 1.061 -0.165 1.054 -0.162 0.637 0.198 0.393 0.388 0.118 0.530 -0.165 0.616 -0.178,0.619 END # POINTS END # SYMBOL If I take just part of the above then it still doesn't work: SYMBOL NAME 'boulderGeometry' TYPE VECTOR FILLED FALSE POINTS -0.154 0.236 -0.111 0.365 -0.116 0.501 -0.165 0.616 -0.170 0.627 END # POINTS END # SYMBOL Any help most greatly appreciated. Regards, Donald -Original Message- From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Donald Kerr Sent: 28 December 2008 21:39 To: mapserver-users@lists.osgeo.org Subject: [mapserver-users] MapServer Symbol Conversion from Polyline Points I've been struggling with this problem all day and cannot make any progress. I hope that someone can help. I want to convert a polyline points array into a MapServer Symbol but keep getting errors. Here's the polyline array: And here's a depiction of the symbol I need to create: http://www.dkerr.co.uk/boulderGeography.gif Many thanks. Regards, Donald ___ 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
