Geographic Information Systems Weekly Newsletter
Geographic Information Systems Weekly Newsletter

Top new questions this week:

Why aren't there LiDAR records in some black and white parts of the scene?

This is the actual scene: This is the corresponding LiDAR scene: The LiDAR data is from xyz file. The questions are: Why are there no points for the dark squares on the checkerboard as well ...

point lidar xyz point-cloud  
asked by goh 5 votes
answered by Pål Herman Sund 7 votes

Visualizing road Intersections & connections in ArcGIS

I am working with polylines (roads) in ArcGIS and I was wondering if there is a possibility to somehow show intersections as well as connecting parts of all the different road-segments. Also, would ...

arcgis-desktop intersection network-analyst network connection  
asked by user57256 5 votes
answered by Alex Tereshenkov 3 votes

QGIS Filtering Multiple Values using Query Builder

I am a complete beginner in QGIS, so I'm sorry if I don't use the right terminology. In the "Query Builder" I can currently filter on value from the "Values List", but I'd like to be able to filter ...

qgis qgis-2.0 query  
asked by DCourt 5 votes
answered by Joseph 2 votes

How to exit QGIS after running a python script?

I would like to run a python script via qgis --code and then immediately exit. I'm using iface.actionExit().trigger(), which kills QGIS when I run it from the python console, but not when ...

qgis python pyqgis  
asked by Conley Owens 5 votes
answered by xunilk 4 votes

How to center a user-defined CRS on an area of interest?

My study extent in central Iran straddles two UTM zones (39 and 40): I would like to create a user-defined CRS in Transverse Mercator projection with central meridian inside this area. Through ...

qgis projection coordinate-system projection-conversions mercator  
asked by EhMM 4 votes
answered by AndreJ 2 votes

How can I remove the gap between two polygon boundaries in QGIS?

I have a couple of messy polygon boundaries (example data) that should share a boundary but don't: I've had a look at some suggested tools for a similar issue using ArcGIS in a separate question ...

qgis topology  
asked by Simbamangu 4 votes
answered by Miro 2 votes

Conditional Spatial Join?

I need to join two layers (a fishnet grid and land cover). I'd like the join to occur only if the the land cover occupies 50% or more of each fishnet grid (See image below). Can anybody provide an ...

arcgis-desktop arcgis-10.0 joins spatial-join conditional  
asked by SoilSciGuy 4 votes
answered by Evil Genius 3 votes

Greatest hits from previous weeks:

How to install GDAL with Python on windows?

Can anyone please explain to me in step by step instructions how to install GDAL/OGR with Python on Windows. I have Windows Vista and I have tried following the information on the website and it does ...

python gdal windows  
asked by GuidoS 48 votes
answered by scw 32 votes

How to Start Web Mapping?

I want to start working on a web map at work to map some of our statistics by city. I have an idea, but I'm not exactly sure where to start. Are there any definitive resources that provide step ...

web-mapping learning-resources  
asked by Brian L 78 votes
answered by underdark 48 votes

Can you answer these?

Using Spyder IDE to develop python for Grass GIS, get 'ImportError: No module named grass.script'

I am trying to use Spyder IDE to develop a python script using python library from grass-6.4.3. I run the script below, and get 'ImportError: No module named grass.script' I am using python 2.7, ...

python grass grass.script spyder  
asked by Poa Chui 2 votes

KML/KMZ: Make one placemark appear in two folders?

I'm not actually sure this is quite the right way to approach this problem, so if I'm just off in the wrong direction, please help me figure out where I should be heading. I have a collection of ...

kml google-earth kmz  
asked by DanM 3 votes

Exposing Active Directory Groups on ArcGIS Server 10.2.2

Is there a way to have ArcGIS Server 10.2.2 expose Active Directory Groups and users instead of just users? I have IIS and the Server set up for Windows Authentication (IIS) and Web Authentication ...

arcgis-10.2 arcgis-server authentication  
asked by gannman 2 votes
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