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comment Create “mean” line from multiple lines using QGIS
Take a look at Average tracks on the OpenStreetMap wiki, which describes a method using R.
Nov
24
answered Load buffer by percentage plugin python error
Nov
20
comment QGIS 2.6.0 Minidump crash EVERY TIME I SAVE
We had similar problems after updating to 2.6. One thing you can try is to open the project in 2.6 and save it under a new file name, instead of saving to the same file. Also, we've since switched to the development version (2.7), which seems more stable in this regard.
Nov
17
comment With QGIS, why use QT Designer tools for creating Slots/Signals/ etc, if plugin coding can do it alone
@John: Some find it easier to create the slot/signal connections using a graphical tool, rather than "hand-coding". You could ask the same question about Qt Designers facilities for creating GUIs: You could also just write the .ui file by hand, but the Qt Designer provides an interface to help you.
Nov
16
awarded  Organizer
Nov
16
revised Generating a Mesh from DTM
Edited tags
Nov
16
comment Generating a Mesh from DTM
@pksorensen: I've edited the answer again: You can also use the open source SAGA GIS to create TINs or TRNs, and export them to STL meshes.
Nov
16
revised Generating a Mesh from DTM
Added SAGA GIS, restructured
Nov
13
comment Generating a Mesh from DTM
@pksorensen: I edited my answer: You can also use the VTBuilder software to convert your grid to a mesh.
Nov
13
revised Generating a Mesh from DTM
Added section on VTBuilder
Nov
12
comment Where can I find a shapefile of hexagons that covers the world?
Could you specify how small "decently small" is? Also, what projection will you be using?
Nov
12
answered Generating a Mesh from DTM
Nov
11
comment Generating a Mesh from DTM
@pksorensen: Fair enough. I think you might not get away with completely avoiding decisions, however. Even though they're used for similar things, raster and mesh formats have some very fundamental differences (similar to raster and vector images), so there's no "default" way for converting between the two. What are you going to do with the mesh (3D printing, visualisation, finite element simulation, ...)?
Nov
10
comment Generating a Mesh from DTM
Do you need the resulting mesh to consist of triangles or quadrilaterals? In the case of triangles, you're looking for a way to convert a raster to a TIN (triangular irregular network). Do you want a naive triangulation (two triangles per raster cell), or do you want to approximate the terrain by using fewer triangles?
Nov
10
comment Producing GIS data from large amount of ASCII DEM files?
What's the format of your ASCII DEM files? Is it one line per point, one column each for X, Y and Z? Are the points evenly sampled on a grid, or are they scattered?
Oct
27
awarded  Nice Answer
Oct
25
awarded  Altruist
Oct
25
comment Zigzag Line Symbol in QGIS
@GaborFarkas: The example uses a polyline. Do you perhaps mean a layer containing several disjoint polylines (a multi-polyline)? That works as well.
Oct
20
answered Zigzag Line Symbol in QGIS
Oct
18
comment Zigzag Line Symbol in QGIS
Thanks for the answer! However, I don't think this will work except for very specific cases like a circular arc with equidistant vertices, otherwise you'll end up with an uneven zigzag line (due to the scaling and due to the densification).