Re: [Qgis-user] mapping bus routes
I think you can get pretty far with aggregate expressions and geometry generators, but I think at some point the complexity just gets unwieldy and using a graphics program is more pragmatic. I even started building a dendrogram legend within a map frame using QGIS at one point. I've never done transit maps before, but one thing I've pondered before is why they always tend to use offsets rather than staggered and overlaid dashed lines. I imagine there has to be some design or ux element about tracing the line with one's eyes that the broken line interferes with tracking the route, but I'd appreciate a link/ article if anyone knows of one, or just some resources that outline why the conventions are what they are. On Sun, 10 Oct 2021 at 00:27, Sam S wrote: > I built a number of bus maps in the past and kept everything inside QGIS > using offsets in symbology. It worked because it was a simple dataset where > the number of routes sharing paths was very minimal, so I just styled each > 'unique' segment individually. I also did not have a problem with aligning > with the street pattern below (David's noted issue) because I styled the > routes larger than the street symbology so any 'incorrect' alignment > between the routes and the streets was hidden by the larger route symbology > on top. > > With a more complicated set of routes I would have probably graduated to a > workflow that included a graphics application as the final step to make > manual tweaks. > > At a certain point of complexity/geographic size most transit maps stop > being truly scalable and become more abstract. A good example of the debate > is NYC's vignelli vs hertz. However, most transit maps (in terms of > 'quantity of maps') are for small operators where scale can be maintained - > so any automated tool might not 'work' for very large not-to-scale systems > but would be the most useful to those with the fewest resources (small > systems). > > Anyways, tough problem. > > Sam > > > On Fri, Oct 8, 2021 at 7:48 AM Nicolas Cadieux < > njacadieux.git...@gmail.com> wrote: > >> Hi, >> >> Maybe Anita Graser has something on the topic? https://anitagraser.com/ She >> does a lot of work in visualization mass transportation. Yes, looking at >> line azimut by color was the way I did it in the past. It’s still a good >> way when the network has a lot of snapping errors. My algorithm with >> permit you find those problems. If you see a network problem my algorithm >> does not find, please tell me and I could work them in. >> >> Nicolas Cadieux >> https://gitlab.com/njacadieux >> >> Le 8 oct. 2021 à 02:54, Andreas Neumann a écrit : >> >> >> >> Hi, >> >> Besides on what was discussed here on the list already, I can add the >> following information: the Swiss QGIS user group has mandated Nyall Dawson >> to carry out a couple of days of research exactly on this topic - kind of a >> feasibility study if it would be possible to draw such network maps "on the >> fly" / automatically - with transit maps and hiking maps (multiple parallel >> hiking routes) in mind. >> >> I believe Nyall will work on this before the end of the year. >> >> Of course we cannot promise anything - but based on the outcome of this >> study, there might be follow-up work pending. If there is interest from >> other users we might want to organize an institutional crowd funding >> initiative. >> >> This won't help you immediately - but it might be good for you to know >> that the problem is on the radar. If there is a positive outcome in the >> study, there might be implementation work pending next year. >> >> Greetings, >> >> Andreas >> >> On 2021-10-07 23:53, David Strip wrote: >> >> For a transit map, it seems the offset would not be constant. Consider >> two bus routes that overlap along a single street in their routes. On that >> street, the two lines typically would be offset to opposite sides of the >> line representing the street. On the rest of the route, however, the route >> would be shown as lying directly over the centerline, not offset to either >> side. Life gets even more complicated when multiple routes overlap with >> different numbers of other routes at various points on the map. Or at >> least that's what I've typically seen on transit maps. >> >> On 10/7/2021 3:30 PM, Nicolas Cadieux wrote: >> >> Hi, >> You can also trim the lines in the symbology (at least in QGIS 3.20) as >> well as giving it an offset. That will insure that intersection are not >> overlapping in the offset. >> >> Nicolas Cadieux >> https://gitlab.com/njacadieux >> >> Le 7 oct. 2021 à 17:23, Nicolas Cadieux >> a écrit : >> >> Oups! Forgot the list... >> >> Nicolas Cadieux >> https://gitlab.com/njacadieux >> >> Le 7 oct. 2021 à 17:23, Nicolas Cadieux >> a écrit : >> >> Hi, >> You can automatically draw an offset by adding a offset in the >> symbology. Things get more complicated when line vectorization changes >> directions as the offset flips side depending on, for example, if the
Re: [Qgis-user] mapping bus routes
I built a number of bus maps in the past and kept everything inside QGIS using offsets in symbology. It worked because it was a simple dataset where the number of routes sharing paths was very minimal, so I just styled each 'unique' segment individually. I also did not have a problem with aligning with the street pattern below (David's noted issue) because I styled the routes larger than the street symbology so any 'incorrect' alignment between the routes and the streets was hidden by the larger route symbology on top. With a more complicated set of routes I would have probably graduated to a workflow that included a graphics application as the final step to make manual tweaks. At a certain point of complexity/geographic size most transit maps stop being truly scalable and become more abstract. A good example of the debate is NYC's vignelli vs hertz. However, most transit maps (in terms of 'quantity of maps') are for small operators where scale can be maintained - so any automated tool might not 'work' for very large not-to-scale systems but would be the most useful to those with the fewest resources (small systems). Anyways, tough problem. Sam On Fri, Oct 8, 2021 at 7:48 AM Nicolas Cadieux wrote: > Hi, > > Maybe Anita Graser has something on the topic? https://anitagraser.com/ She > does a lot of work in visualization mass transportation. Yes, looking at > line azimut by color was the way I did it in the past. It’s still a good > way when the network has a lot of snapping errors. My algorithm with > permit you find those problems. If you see a network problem my algorithm > does not find, please tell me and I could work them in. > > Nicolas Cadieux > https://gitlab.com/njacadieux > > Le 8 oct. 2021 à 02:54, Andreas Neumann a écrit : > > > > Hi, > > Besides on what was discussed here on the list already, I can add the > following information: the Swiss QGIS user group has mandated Nyall Dawson > to carry out a couple of days of research exactly on this topic - kind of a > feasibility study if it would be possible to draw such network maps "on the > fly" / automatically - with transit maps and hiking maps (multiple parallel > hiking routes) in mind. > > I believe Nyall will work on this before the end of the year. > > Of course we cannot promise anything - but based on the outcome of this > study, there might be follow-up work pending. If there is interest from > other users we might want to organize an institutional crowd funding > initiative. > > This won't help you immediately - but it might be good for you to know > that the problem is on the radar. If there is a positive outcome in the > study, there might be implementation work pending next year. > > Greetings, > > Andreas > > On 2021-10-07 23:53, David Strip wrote: > > For a transit map, it seems the offset would not be constant. Consider two > bus routes that overlap along a single street in their routes. On that > street, the two lines typically would be offset to opposite sides of the > line representing the street. On the rest of the route, however, the route > would be shown as lying directly over the centerline, not offset to either > side. Life gets even more complicated when multiple routes overlap with > different numbers of other routes at various points on the map. Or at > least that's what I've typically seen on transit maps. > > On 10/7/2021 3:30 PM, Nicolas Cadieux wrote: > > Hi, > You can also trim the lines in the symbology (at least in QGIS 3.20) as > well as giving it an offset. That will insure that intersection are not > overlapping in the offset. > > Nicolas Cadieux > https://gitlab.com/njacadieux > > Le 7 oct. 2021 à 17:23, Nicolas Cadieux > a écrit : > > Oups! Forgot the list... > > Nicolas Cadieux > https://gitlab.com/njacadieux > > Le 7 oct. 2021 à 17:23, Nicolas Cadieux > a écrit : > > Hi, > You can automatically draw an offset by adding a offset in the symbology. > Things get more complicated when line vectorization changes directions as > the offset flips side depending on, for example, if the line is drawn from > A to B or B to A. > > In the QGIS models, https://plugins.qgis.org/, go to models then Fix > Directional Network models 1,2 and 3. That will help you find problems > (like disconnected lines) but also identify all the lines that are flipped. > You can then flip them manually or figure out an algorithm to do it > automatically. > > You will also find a boring YouTube video on my YouTube channel. > https://youtu.be/v61PafSByvM > > Nicolas Cadieux > https://gitlab.com/njacadieux > > Le 7 oct. 2021 à 14:17, Hugh Kelley > a écrit : > > Hi all, > > I'm wondering if anyone has any good tricks for mapping bus routes. The > key problem is defining how to offset lines where the routes overlap. > > I've handled this by chopping up the lines and offsetting in postgis > according to some st_dwithins and st_intersections but wanted to see if > there is anything in the wide world of QGIS that I'm not
Re: [Qgis-user] mapping bus routes
Hi, Maybe Anita Graser has something on the topic? https://anitagraser.com/ She does a lot of work in visualization mass transportation. Yes, looking at line azimut by color was the way I did it in the past. It’s still a good way when the network has a lot of snapping errors. My algorithm with permit you find those problems. If you see a network problem my algorithm does not find, please tell me and I could work them in. Nicolas Cadieux https://gitlab.com/njacadieux > Le 8 oct. 2021 à 02:54, Andreas Neumann a écrit : > > > Hi, > > Besides on what was discussed here on the list already, I can add the > following information: the Swiss QGIS user group has mandated Nyall Dawson to > carry out a couple of days of research exactly on this topic - kind of a > feasibility study if it would be possible to draw such network maps "on the > fly" / automatically - with transit maps and hiking maps (multiple parallel > hiking routes) in mind. > > I believe Nyall will work on this before the end of the year. > > Of course we cannot promise anything - but based on the outcome of this > study, there might be follow-up work pending. If there is interest from other > users we might want to organize an institutional crowd funding initiative. > > This won't help you immediately - but it might be good for you to know that > the problem is on the radar. If there is a positive outcome in the study, > there might be implementation work pending next year. > > Greetings, > > Andreas > >> On 2021-10-07 23:53, David Strip wrote: >> >> For a transit map, it seems the offset would not be constant. Consider two >> bus routes that overlap along a single street in their routes. On that >> street, the two lines typically would be offset to opposite sides of the >> line representing the street. On the rest of the route, however, the route >> would be shown as lying directly over the centerline, not offset to either >> side. Life gets even more complicated when multiple routes overlap with >> different numbers of other routes at various points on the map. Or at least >> that's what I've typically seen on transit maps. >> >>> On 10/7/2021 3:30 PM, Nicolas Cadieux wrote: >>> Hi, >>> You can also trim the lines in the symbology (at least in QGIS 3.20) as >>> well as giving it an offset. That will insure that intersection are not >>> overlapping in the offset. >>> >>> Nicolas Cadieux >>> https://gitlab.com/njacadieux >>> Le 7 oct. 2021 à 17:23, Nicolas Cadieux a écrit : Oups! Forgot the list... Nicolas Cadieux https://gitlab.com/njacadieux > Le 7 oct. 2021 à 17:23, Nicolas Cadieux a > écrit : > > Hi, > You can automatically draw an offset by adding a offset in the symbology. > Things get more complicated when line vectorization changes directions > as the offset flips side depending on, for example, if the line is drawn > from A to B or B to A. > > In the QGIS models, https://plugins.qgis.org/, go to models then Fix > Directional Network models 1,2 and 3. That will help you find problems > (like disconnected lines) but also identify all the lines that are > flipped. You can then flip them manually or figure out an algorithm to do > it automatically. > > You will also find a boring YouTube video on my YouTube channel. > https://youtu.be/v61PafSByvM > > Nicolas Cadieux > https://gitlab.com/njacadieux > >> Le 7 oct. 2021 à 14:17, Hugh Kelley a écrit : >> >> Hi all, >> >> I'm wondering if anyone has any good tricks for mapping bus routes. The >> key problem is defining how to offset lines where the routes overlap. >> >> I've handled this by chopping up the lines and offsetting in postgis >> according to some st_dwithins and st_intersections but wanted to see if >> there is anything in the wide world of QGIS that I'm not aware of. >> >> My understanding is that it's a fairly significant challenge to do a >> great job with it. A company called transitapp had an interesting blog >> post about it a while ago. >> https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1 >> >> >> Hugh >> >> ___ >> Qgis-user mailing list >> Qgis-user@lists.osgeo.org >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >>> >>> >>> ___ >>> Qgis-user mailing list >>> Qgis-user@lists.osgeo.org >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >> >> >> >> ___ >> Qgis-user mailing list >> Qgis-user@lists.osgeo.org >> List info:
Re: [Qgis-user] mapping bus routes
Fascinating topic indeed. You might be interested in the upcoming Schematic Mapping Workshop, see https://www.ruhr-uni-bochum.de/schematicmapping/ If you check out some of the papers produced in that series (and their references), you will discover links to the two "branches" of this field: the artistic/manual and the algorithmic/automation , plus interesting links to HCI and usability research connected to it... -- Barend Köbben From: Qgis-user on behalf of Andreas Neumann Date: Friday, 8 October 2021 at 09:09 To: David Strip Cc: Qgis List Subject: Re: [Qgis-user] mapping bus routes and yes - the problem is really not simple, but indeed very challenging. Most transit maps today are not done in a GIS, but by designers in a graphics applications, like Adobe-Illustrator. The process is usually not automated, but manual. However, I believe a semi-automated approach would be great to have. For some, the outcome might be satisfactory, for others not - and these could start with (Q)GIS and continue later in a graphics package. Andreas On 2021-10-08 08:54, Andreas Neumann wrote: Hi, Besides on what was discussed here on the list already, I can add the following information: the Swiss QGIS user group has mandated Nyall Dawson to carry out a couple of days of research exactly on this topic - kind of a feasibility study if it would be possible to draw such network maps "on the fly" / automatically - with transit maps and hiking maps (multiple parallel hiking routes) in mind. I believe Nyall will work on this before the end of the year. Of course we cannot promise anything - but based on the outcome of this study, there might be follow-up work pending. If there is interest from other users we might want to organize an institutional crowd funding initiative. This won't help you immediately - but it might be good for you to know that the problem is on the radar. If there is a positive outcome in the study, there might be implementation work pending next year. Greetings, Andreas On 2021-10-07 23:53, David Strip wrote: For a transit map, it seems the offset would not be constant. Consider two bus routes that overlap along a single street in their routes. On that street, the two lines typically would be offset to opposite sides of the line representing the street. On the rest of the route, however, the route would be shown as lying directly over the centerline, not offset to either side. Life gets even more complicated when multiple routes overlap with different numbers of other routes at various points on the map. Or at least that's what I've typically seen on transit maps. On 10/7/2021 3:30 PM, Nicolas Cadieux wrote: Hi, You can also trim the lines in the symbology (at least in QGIS 3.20) as well as giving it an offset. That will insure that intersection are not overlapping in the offset. Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 17:23, Nicolas Cadieux <mailto:njacadieux.git...@gmail.com> a écrit : Oups! Forgot the list... Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 17:23, Nicolas Cadieux <mailto:njacadieux.git...@gmail.com> a écrit : Hi, You can automatically draw an offset by adding a offset in the symbology. Things get more complicated when line vectorization changes directions as the offset flips side depending on, for example, if the line is drawn from A to B or B to A. In the QGIS models, https://plugins.qgis.org/, go to models then Fix Directional Network models 1,2 and 3. That will help you find problems (like disconnected lines) but also identify all the lines that are flipped. You can then flip them manually or figure out an algorithm to do it automatically. You will also find a boring YouTube video on my YouTube channel. https://youtu.be/v61PafSByvM Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 14:17, Hugh Kelley <mailto:hghk...@gmail.com> a écrit : Hi all, I'm wondering if anyone has any good tricks for mapping bus routes. The key problem is defining how to offset lines where the routes overlap. I've handled this by chopping up the lines and offsetting in postgis according to some st_dwithins and st_intersections but wanted to see if there is anything in the wide world of QGIS that I'm not aware of. My understanding is that it's a fairly significant challenge to do a great job with it. A company called transitapp had an interesting blog post about it a while ago. https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1 Hugh ___ Qgis-user mailing list Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org<mail
Re: [Qgis-user] mapping bus routes
and yes - the problem is really not simple, but indeed very challenging. Most transit maps today are not done in a GIS, but by designers in a graphics applications, like Adobe-Illustrator. The process is usually not automated, but manual. However, I believe a semi-automated approach would be great to have. For some, the outcome might be satisfactory, for others not - and these could start with (Q)GIS and continue later in a graphics package. Andreas On 2021-10-08 08:54, Andreas Neumann wrote: Hi, Besides on what was discussed here on the list already, I can add the following information: the Swiss QGIS user group has mandated Nyall Dawson to carry out a couple of days of research exactly on this topic - kind of a feasibility study if it would be possible to draw such network maps "on the fly" / automatically - with transit maps and hiking maps (multiple parallel hiking routes) in mind. I believe Nyall will work on this before the end of the year. Of course we cannot promise anything - but based on the outcome of this study, there might be follow-up work pending. If there is interest from other users we might want to organize an institutional crowd funding initiative. This won't help you immediately - but it might be good for you to know that the problem is on the radar. If there is a positive outcome in the study, there might be implementation work pending next year. Greetings, Andreas On 2021-10-07 23:53, David Strip wrote: For a transit map, it seems the offset would not be constant. Consider two bus routes that overlap along a single street in their routes. On that street, the two lines typically would be offset to opposite sides of the line representing the street. On the rest of the route, however, the route would be shown as lying directly over the centerline, not offset to either side. Life gets even more complicated when multiple routes overlap with different numbers of other routes at various points on the map. Or at least that's what I've typically seen on transit maps. On 10/7/2021 3:30 PM, Nicolas Cadieux wrote: Hi, You can also trim the lines in the symbology (at least in QGIS 3.20) as well as giving it an offset. That will insure that intersection are not overlapping in the offset. Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 17:23, Nicolas Cadieux a écrit : Oups! Forgot the list... Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 17:23, Nicolas Cadieux a écrit : Hi, You can automatically draw an offset by adding a offset in the symbology. Things get more complicated when line vectorization changes directions as the offset flips side depending on, for example, if the line is drawn from A to B or B to A. In the QGIS models, https://plugins.qgis.org/, go to models then Fix Directional Network models 1,2 and 3. That will help you find problems (like disconnected lines) but also identify all the lines that are flipped. You can then flip them manually or figure out an algorithm to do it automatically. You will also find a boring YouTube video on my YouTube channel. https://youtu.be/v61PafSByvM Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 14:17, Hugh Kelley a écrit : Hi all, I'm wondering if anyone has any good tricks for mapping bus routes. The key problem is defining how to offset lines where the routes overlap. I've handled this by chopping up the lines and offsetting in postgis according to some st_dwithins and st_intersections but wanted to see if there is anything in the wide world of QGIS that I'm not aware of. My understanding is that it's a fairly significant challenge to do a great job with it. A company called transitapp had an interesting blog post about it a while ago. https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1 Hugh ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] mapping bus routes
Hi, Besides on what was discussed here on the list already, I can add the following information: the Swiss QGIS user group has mandated Nyall Dawson to carry out a couple of days of research exactly on this topic - kind of a feasibility study if it would be possible to draw such network maps "on the fly" / automatically - with transit maps and hiking maps (multiple parallel hiking routes) in mind. I believe Nyall will work on this before the end of the year. Of course we cannot promise anything - but based on the outcome of this study, there might be follow-up work pending. If there is interest from other users we might want to organize an institutional crowd funding initiative. This won't help you immediately - but it might be good for you to know that the problem is on the radar. If there is a positive outcome in the study, there might be implementation work pending next year. Greetings, Andreas On 2021-10-07 23:53, David Strip wrote: For a transit map, it seems the offset would not be constant. Consider two bus routes that overlap along a single street in their routes. On that street, the two lines typically would be offset to opposite sides of the line representing the street. On the rest of the route, however, the route would be shown as lying directly over the centerline, not offset to either side. Life gets even more complicated when multiple routes overlap with different numbers of other routes at various points on the map. Or at least that's what I've typically seen on transit maps. On 10/7/2021 3:30 PM, Nicolas Cadieux wrote: Hi, You can also trim the lines in the symbology (at least in QGIS 3.20) as well as giving it an offset. That will insure that intersection are not overlapping in the offset. Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 17:23, Nicolas Cadieux a écrit : Oups! Forgot the list... Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 17:23, Nicolas Cadieux a écrit : Hi, You can automatically draw an offset by adding a offset in the symbology. Things get more complicated when line vectorization changes directions as the offset flips side depending on, for example, if the line is drawn from A to B or B to A. In the QGIS models, https://plugins.qgis.org/, go to models then Fix Directional Network models 1,2 and 3. That will help you find problems (like disconnected lines) but also identify all the lines that are flipped. You can then flip them manually or figure out an algorithm to do it automatically. You will also find a boring YouTube video on my YouTube channel. https://youtu.be/v61PafSByvM Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 14:17, Hugh Kelley a écrit : Hi all, I'm wondering if anyone has any good tricks for mapping bus routes. The key problem is defining how to offset lines where the routes overlap. I've handled this by chopping up the lines and offsetting in postgis according to some st_dwithins and st_intersections but wanted to see if there is anything in the wide world of QGIS that I'm not aware of. My understanding is that it's a fairly significant challenge to do a great job with it. A company called transitapp had an interesting blog post about it a while ago. https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1 Hugh ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] mapping bus routes
Thank you Nicolas I will give that yutube video a look. I have historically handled the orientation problem by checking azimuths but actually fixing the linework may save me some time in some cases so I think there's good potential there. David you're exactly right about that aspect of the problem, its not a simple thing. Add to that a preference to have a route that eventually turns right offset to the right of an overlapping route that continues straight and its even more complicated. Its also sometimes difficult to decide how to handle stop points as well. Would be a nice plugin to put together to convert real routes into stylized routes but I think that would be a fairly demanding long term project on my end at least. On Thu, Oct 7, 2021, 5:53 PM David Strip wrote: > For a transit map, it seems the offset would not be constant. Consider two > bus routes that overlap along a single street in their routes. On that > street, the two lines typically would be offset to opposite sides of the > line representing the street. On the rest of the route, however, the route > would be shown as lying directly over the centerline, not offset to either > side. Life gets even more complicated when multiple routes overlap with > different numbers of other routes at various points on the map. Or at > least that's what I've typically seen on transit maps. > > On 10/7/2021 3:30 PM, Nicolas Cadieux wrote: > > Hi, > You can also trim the lines in the symbology (at least in QGIS 3.20) as > well as giving it an offset. That will insure that intersection are not > overlapping in the offset. > > Nicolas Cadieux > https://gitlab.com/njacadieux > > Le 7 oct. 2021 à 17:23, Nicolas Cadieux > a écrit : > > Oups! Forgot the list… > > Nicolas Cadieux > https://gitlab.com/njacadieux > > Le 7 oct. 2021 à 17:23, Nicolas Cadieux > a écrit : > > Hi, > You can automatically draw an offset by adding a offset in the symbology. > Things get more complicated when line vectorization changes directions as > the offset flips side depending on, for example, if the line is drawn from > A to B or B to A. > > In the QGIS models, https://plugins.qgis.org/, go to models then Fix > Directional Network models 1,2 and 3. That will help you find problems > (like disconnected lines) but also identify all the lines that are flipped. > You can then flip them manually or figure out an algorithm to do it > automatically. > > You will also find a boring YouTube video on my YouTube channel. > https://youtu.be/v61PafSByvM > > Nicolas Cadieux > https://gitlab.com/njacadieux > > Le 7 oct. 2021 à 14:17, Hugh Kelley > a écrit : > > > Hi all, > > I'm wondering if anyone has any good tricks for mapping bus routes. The > key problem is defining how to offset lines where the routes overlap. > > I've handled this by chopping up the lines and offsetting in postgis > according to some st_dwithins and st_intersections but wanted to see if > there is anything in the wide world of QGIS that I'm not aware of. > > My understanding is that it's a fairly significant challenge to do a great > job with it. A company called transitapp had an interesting blog post about > it a while ago. > https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1 > > > Hugh > > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > > ___ > Qgis-user mailing listqgis-u...@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > > > ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] mapping bus routes
For a transit map, it seems the offset would not be constant. Consider two bus routes that overlap along a single street in their routes. On that street, the two lines typically would be offset to opposite sides of the line representing the street. On the rest of the route, however, the route would be shown as lying directly over the centerline, not offset to either side. Life gets even more complicated when multiple routes overlap with different numbers of other routes at various points on the map. Or at least that's what I've typically seen on transit maps. On 10/7/2021 3:30 PM, Nicolas Cadieux wrote: Hi, You can also trim the lines in the symbology (at least in QGIS 3.20) as well as giving it an offset. That will insure that intersection are not overlapping in the offset. Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 17:23, Nicolas Cadieux a écrit : Oups! Forgot the list… Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 17:23, Nicolas Cadieux a écrit : Hi, You can automatically draw an offset by adding a offset in the symbology. Things get more complicated when line vectorization changes directions as the offset flips side depending on, for example, if the line is drawn from A to B or B to A. In the QGIS models, https://plugins.qgis.org/, go to models then Fix Directional Network models 1,2 and 3. That will help you find problems (like disconnected lines) but also identify all the lines that are flipped. You can then flip them manually or figure out an algorithm to do it automatically. You will also find a boring YouTube video on my YouTube channel. https://youtu.be/v61PafSByvM Nicolas Cadieux https://gitlab.com/njacadieux Le 7 oct. 2021 à 14:17, Hugh Kelley a écrit : Hi all, I'm wondering if anyone has any good tricks for mapping bus routes. The key problem is defining how to offset lines where the routes overlap. I've handled this by chopping up the lines and offsetting in postgis according to some st_dwithins and st_intersections but wanted to see if there is anything in the wide world of QGIS that I'm not aware of. My understanding is that it's a fairly significant challenge to do a great job with it. A company called transitapp had an interesting blog post about it a while ago. https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1 Hugh ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] mapping bus routes
Hi, You can also trim the lines in the symbology (at least in QGIS 3.20) as well as giving it an offset. That will insure that intersection are not overlapping in the offset. Nicolas Cadieux https://gitlab.com/njacadieux > Le 7 oct. 2021 à 17:23, Nicolas Cadieux a écrit > : > > Oups! Forgot the list… > > Nicolas Cadieux > https://gitlab.com/njacadieux > >>> Le 7 oct. 2021 à 17:23, Nicolas Cadieux a >>> écrit : >>> >> Hi, >> You can automatically draw an offset by adding a offset in the symbology. >> Things get more complicated when line vectorization changes directions as >> the offset flips side depending on, for example, if the line is drawn from A >> to B or B to A. >> >> In the QGIS models, https://plugins.qgis.org/, go to models then Fix >> Directional Network models 1,2 and 3. That will help you find problems >> (like disconnected lines) but also identify all the lines that are flipped. >> You can then flip them manually or figure out an algorithm to do it >> automatically. >> >> You will also find a boring YouTube video on my YouTube channel. >> https://youtu.be/v61PafSByvM >> >> Nicolas Cadieux >> https://gitlab.com/njacadieux >> Le 7 oct. 2021 à 14:17, Hugh Kelley a écrit : >>> >>> Hi all, >>> >>> I'm wondering if anyone has any good tricks for mapping bus routes. The key >>> problem is defining how to offset lines where the routes overlap. >>> >>> I've handled this by chopping up the lines and offsetting in postgis >>> according to some st_dwithins and st_intersections but wanted to see if >>> there is anything in the wide world of QGIS that I'm not aware of. >>> >>> My understanding is that it's a fairly significant challenge to do a great >>> job with it. A company called transitapp had an interesting blog post about >>> it a while ago. >>> https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1 >>> >>> >>> Hugh >>> >>> ___ >>> Qgis-user mailing list >>> Qgis-user@lists.osgeo.org >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] mapping bus routes
Oups! Forgot the list… Nicolas Cadieux https://gitlab.com/njacadieux > Le 7 oct. 2021 à 17:23, Nicolas Cadieux a écrit > : > > Hi, > You can automatically draw an offset by adding a offset in the symbology. > Things get more complicated when line vectorization changes directions as the > offset flips side depending on, for example, if the line is drawn from A to B > or B to A. > > In the QGIS models, https://plugins.qgis.org/, go to models then Fix > Directional Network models 1,2 and 3. That will help you find problems (like > disconnected lines) but also identify all the lines that are flipped. You can > then flip them manually or figure out an algorithm to do it automatically. > > You will also find a boring YouTube video on my YouTube channel. > https://youtu.be/v61PafSByvM > > Nicolas Cadieux > https://gitlab.com/njacadieux > >>> Le 7 oct. 2021 à 14:17, Hugh Kelley a écrit : >>> >> >> Hi all, >> >> I'm wondering if anyone has any good tricks for mapping bus routes. The key >> problem is defining how to offset lines where the routes overlap. >> >> I've handled this by chopping up the lines and offsetting in postgis >> according to some st_dwithins and st_intersections but wanted to see if >> there is anything in the wide world of QGIS that I'm not aware of. >> >> My understanding is that it's a fairly significant challenge to do a great >> job with it. A company called transitapp had an interesting blog post about >> it a while ago. >> https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1 >> >> >> Hugh >> >> ___ >> Qgis-user mailing list >> Qgis-user@lists.osgeo.org >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] mapping bus routes
Hi all, I'm wondering if anyone has any good tricks for mapping bus routes. The key problem is defining how to offset lines where the routes overlap. I've handled this by chopping up the lines and offsetting in postgis according to some st_dwithins and st_intersections but wanted to see if there is anything in the wide world of QGIS that I'm not aware of. My understanding is that it's a fairly significant challenge to do a great job with it. A company called transitapp had an interesting blog post about it a while ago. https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1 Hugh ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
