[Qgis-user] Exception: IllegalArgumentException: Cannot get offset of single-vertex line
I repeatedly get this error message in the GEOS log window when I use the qgis2threejs plugin to render a model of my project. Exception: IllegalArgumentException: Cannot get offset of single-vertex line As far as I'm aware, I don't have any single-vertex lines; is there any way to check easily? The same project often fails to render, with the following message: TypeError: QgsNullSymbolRenderer.symbolForFeature(QgsFeature, QgsRenderContext): not enough arguments I wonder if the two are related or coincidental? I have raised an issue on the qgis2threejs project page. Does anyone have any ideas? Cheers, -- robin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] rendering raster tiles from qgis; best solution?
hi folks, i would like to make some raster-based leaflet/openlayers web maps for a couple of projects i'm working on at the moment and would appreciate some suggestions on the best way to go about it. the projects are both small, the largest is 2km x 2km, with zoom from 15-23 required. they are stored in postgis and spatialite databases. i have tried qtiles and qmetatiles (a fork of qtiles), but both suffer from the same buggy rendering artefacts at zoom levels greater than 20. does anyone have any suggestions for alternatives? it need not be a qgis solution, i'm willing to consider something which connects directly to the databases. a mapnik render-on-request stack is probably more complicated than i'm willing to do. someone suggested using gdal2tiles, but i didn't get very far when i investigated, it appeared vastly more complicated than necessary the more i dug into it; that may be a consequence of my lack of knowledge. i also tried qgis2web, but the qtwebkit bug discounts that tool. cheers, -- robin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] error 50 : internet error
On 2016-09-01 15:56, Ronen Pelleg wrote: getting this error when trying to download map files where are you getting the map files from? is your internet connection ok? try accessing the map files from some other source, e.g. if they are openstreetmap files, see if you can access openstreetmap.org -- robin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Malfunction of QTiles
On 2016-09-01 23:10, massimiliano crea wrote: Hello, I'm a Qgis user for several years. Use the program to create maps to be printed on paper. Now I created a map using OSM map data and official of my region, working with raster and vector. I use Qgis 2.14.3 and I'm using QTiles to realize tiles for a publication on the web. My problem is that the labels do not fit between the various tiles. Simulating the collage of adjacent tiles, the labels are all fragmented. How can I fix? Can you give me some guidance? firstly, could you create a new email thread if you want to discuss a new topic? merely changing the "subject" line after hitting "reply" breaks the threading for those of us that use it. maybe yahoo and certainly google mail will break it even more to make an attempt to describe it correctly, so you may not see this problem. secondly, there are a few bugs in qtiles, take a look at https://github.com/nextgis/QTiles/issues . this is because it is relatively new, experimental software. i also have the bug you described, probably others have too. -- robin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] "live" openstreetmap data in qgis
On 2016-09-01 22:00, Paolo Cavallini wrote: If your data is not that big, you could use QuickOsm processing scripts to automate this a bit ( and use a macro at project opening to launch the processing model you have build combining QuickOsm algs and others more generic algs to do the job.) If QuickOsm lacks some features, you should improve this plugin instead of creating a new one, IMHO. Agreed, the "live update" could be a very nice addition to QuickOSM plugin IMHO. All the best. i agree with both of you in principle. it depends upon the state of the plugin i guess and the response of the maintainers to pull requests. can you go into detail or point me to info about "QuickOsm processing scripts"? i know of quickosm, but not the script side of it. i looked at that plugin before writing the first email; i must have missed some key functionality. cheers for the pointers, -- robin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] "live" openstreetmap data in qgis
On 2016-09-01 10:04, Robin Paulson wrote: On 2016-08-29 04:24, Etienne Trimaille wrote: You have to set up a database with the OSM diff to get an up to date OSM database. Then you can add your PostGIS layers in QGIS. You can have a look to this docker project : https://github.com/kartoza/docker-osm [2] These OSM layers are updated every two minutes by default, and you can see these layers in QGIS. that's excellent, i'll take a look at that, cheers. in answer to the original question of use case: i and others are continually adding data to osm in a particular area which interests us, and using that data in our qgis project. we wish to keep track of that data and how it relates to other (non-osm) data in our qgis project. we have found it is easiest to visualise this within the qgis project. -- robin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] "live" openstreetmap data in qgis
On 2016-08-29 02:56, Greg Troxel wrote: Robin Paulson <ro...@bumblepuppy.org> writes: at the moment there are various ways to add openstreetmap data to qgis. as far as i can tell, they all rely upon downloading a .osm/obf/pbf file in some semi-automated way and importing it. none of the existing tools allow for any existing data to be deleted and replaced with the new. what i would like to do is add a "live" layer to my qgis projects, such that any data is periodically and transparently re-downloaded and updated. for those of you who are familiar with JOSM, this would be similar to the "continuos download" [sic] plugin for that software. Two thoughts (and note that I don't use qgis yet, but do map for OSM): OSM resources can be somewhat easily overwhelmed, so some care in understanding the load put on servers is in order, unless you are talking about downloading from someplace outside of OSM that you're paying for access, etc. the data we are getting is currently around 1MB of .osm files. we may get more in future, but nowhere near enough to cause any problems. People sometimes import OSM into postgis, and then apply daily/hourly/minutely diff files to keep their database up to date. Doing this and having qgis operate from the live database seems like a plausible way to do what you want. A local database could also support other uses such as tile generation. yep, the workflow at the moment is to periodically use osm2pgsql to import new overpass-sourced data into postgis, but it's fiddly and requires me to maintain sql (i hate sql...) statements to process the data correctly, set up primary keys, maintain .style files, etc. i was hoping for something in existence already. maybe i build a thing myself out of my kludgy scripts and publish it. -- robin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] "live" openstreetmap data in qgis
at the moment there are various ways to add openstreetmap data to qgis. as far as i can tell, they all rely upon downloading a .osm/obf/pbf file in some semi-automated way and importing it. none of the existing tools allow for any existing data to be deleted and replaced with the new. what i would like to do is add a "live" layer to my qgis projects, such that any data is periodically and transparently re-downloaded and updated. for those of you who are familiar with JOSM, this would be similar to the "continuos download" [sic] plugin for that software. so, any suggestions? at present, the only solution i have is a script which runs every n minutes/hours to download the requisite area (based upon the boundary of the qgis project), deletes the contents of the existing .osm layer and then imports the new data. i'd like to know if anyone has other ideas or can point me to existing functionality/plugins. cheers -- robin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] defining a variable width vector style
On 2016-08-15 08:16, Tom Lennon wrote: It appears that you can make arrows with tapered shafts. The shafts hasve start and end width settings and the heads could be set small. The shafts can also follow curved lines. Haven't tried it yet yep, that worked. cheers Tom. unfortunately i realised there's a further problem: my style is more complicated than a simple line, so it doesn't quite work as i need. i may have to dive into python. can anyone recommend any good tutorials for getting started with qgis styles and python? -- robin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] defining a variable width vector style
hi folks, i'm trying to define a style which varies along the length of the line it's applied to, according to the position along that line. at the moment, as far as i can see, all styles are continuous along the line so, for example let's say i want the line to be drawn as a cone, i would define the width of the style as proportional to the position on the line. something like: line_width = line_pos x 0.1 at the start of the line, the width of the style should be 0m 1m along the line, the width should be 0.1m 1.5m along the line, the width should be 0.15m 10m along the line, the width should be 1m and so on any ideas about the best way to do this? i considered adding a *lot* of nodes and varying the width in small steps at each node, but that would be clumsy and fiddly. cheers, -- robin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to sort integer value in attributes table
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On 2016-08-12 20:24, Amedeo Fadini wrote: Hi everybody, don't know if it's been in this way from the beginning, but today I've noticed that I'm not able to sort the attribute table by a numeric value: it's always managed as a text. ... I'm using Qgis 2.16.0-Nødebo rev 2f9ed29 GDAl 1.10 on Debian 8 Is it normal or is a issue? Anybody can confirm? yep, i got this too. all attributes do this on my system, real, integer, etc. - -- robin -BEGIN PGP SIGNATURE- Version: Mailvelope v1.5.1 Comment: https://www.mailvelope.com wsBcBAEBCAAQBQJXrYljCRDpJZZoBiZO6QAAS6gH/37ZcASI7CXG5c5L5tuc Dwm2nYOnMQ0vfFbB/7fkX9Vx2mF9AmF/9irf1hnDI4/dJn71uz9tozYa+XNM nL04FrFFUlq0Lny6qOpa0Xk+/saTn3BMciKiaGqFgKUxYpg3mDWWVKcTysvD 0Abixf4yLVIKkwHCfDB27s59kPOD2mDYszpzYRSyKnbILKJFeflKZkushfgQ IAw8+NkdCiTtJ01YZPjjLX4LVxD0eO1jZ3eO2PwxKoepJT6Eeav2I06ylx8O TJ6eUscngeBYYxbIT0lAgbrVbdrFTo6Z1WmA1TtlWSj8XnOzfWPik4UaWsnK mivBLHX8HJzEtEGihRrHoqs= =P9pO -END PGP SIGNATURE- ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
