1,356 reputation
517
bio website snorf.net
location Oxford, United Kingdom
age 26
visits member for 2 years, 1 month
seen 18 hours ago

Environmental scientist working for an engineering consultancy, with interests in GIS and programming.


18h
answered spatial analysis by attribute value
Dec
1
comment ARCGIS 10 definition query to select the max value from a group
Note that to use the MAX function the layer needs to be in a Personal Geodatabase (not a File Geodatabase!) resources.arcgis.com/en/help/main/10.1/index.html#//…
Nov
18
asked Automatically creating index features for a strip map in QGIS
Nov
7
asked Partial loss of projection data converting to MapInfo File with OGR
Nov
3
asked Loading virtual vector layer in QGIS
Nov
1
awarded  Yearling
Oct
29
comment Importing kml google earth polygons to QGIS
The specification for the KML format is that the projection should always be WGS84 (EPSG:4326). What projection is the base data you're comparing it to saved in?
Oct
23
comment PyQGIS reload a QGIS plguin
Rather than reloading the whole plugin, why don't you write a function that resets the UI? You don't reboot your computer every time you want to close a program.
Oct
12
answered Is TileMill opensource?
Oct
5
answered Least cost path with one-off cost for highest elevation
Oct
5
comment Least cost path with one-off cost for highest elevation
I don't follow what you mean. I understand how to find the highest elevation intersecting the line, and the elevation of the source and target points, but not how to include this in a least-cost path algorithm.
Oct
5
accepted Error reading large virtual raster with rasterio: “Cannot invert degenerate transform”
Oct
3
asked Least cost path with one-off cost for highest elevation
Sep
26
awarded  Popular Question
Sep
7
comment How do I prevent Qgis from being detected as “not responding” when running a heavy plugin?
@HåvardTveite You are correct. I've fixed the code in the answer.
Sep
7
revised How do I prevent Qgis from being detected as “not responding” when running a heavy plugin?
Minor syntax fix.
Aug
18
awarded  Constituent
Aug
18
awarded  Caucus
Aug
15
comment Creating one DEM from multiple ASC files
I've had success merging raster files using gdalbuildvrt to create a .vrt virtual raster, then gdal_translate or gdalwarp to convert the virtual raster to a single image. If you convert your ASC files to compressed GeoTIFF files first you'll have less headaches with memory - you can do this with gdal_translate.
Aug
15
comment Pyproj: converting WGS84 to Robinson
Answer edited to include an example of using pyproj directly to convert the coordinates. You'll have to take a small step further to convert that to pixel coordinates.