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8h
comment How to build a query/expression to select specific points within a buffer? (in QGIS)
@wiltomap found an hour :) model now returns a selection instead of a new layer!
8h
revised How to build a query/expression to select specific points within a buffer? (in QGIS)
fixed model to return a selection instead of a new layer
1d
comment How to build a query/expression to select specific points within a buffer? (in QGIS)
If you don't want the buffer layer then you can just remove it from the output in the model. I put it in there as an extra output to make sure the thing was doing what I expected. Good point about the selection though... There is a "Select by..." operator that can do intersections... If I had a free hour...
1d
comment Opposite of least cost path?
By "reverse" you mean "negate"? A cost of 10 becomes -10, a cost of -3 becomes +3 and so on?
1d
comment How to determine area from polygon?
I was going to dig a hole and fill it with the waste. People don't like big piles of waste. Its still not possible to compute the surface area without knowing the shape of the pile though. Can you edit the question to clarify? Do you want the formula for the area of a cone given its volume and pointy angle?
1d
revised How to build a query/expression to select specific points within a buffer? (in QGIS)
added 731 characters in body
1d
answered How to build a query/expression to select specific points within a buffer? (in QGIS)
1d
comment How to determine area from polygon?
So you want to create a hole that is 10M m^3 in volume? Well then it could have an area of 1m^2 and a depth of 10M m. Or you could have a polygon of 10M m^2 and a depth of 1m. Could you clarify?
1d
comment Georeference data for Africa
And what is in the spreadsheet, exactly? Place names? Postal codes? Local coordinates?
2d
comment Convert to lat-lon coordinates GDAL
Ooh. Possibly because the grid system reference has Y increasing southwards (on the Canadian side of the pole anyway). Sorry, but I can't download a 750Mb file to play with this.
2d
revised Convert to lat-lon coordinates GDAL
added 491 characters in body
2d
comment Convert to lat-lon coordinates GDAL
Do you have QGIS, ArcGIS, R, something else, or do you want to do all this with GDAL command-line tools?
2d
answered Convert to lat-lon coordinates GDAL
2d
comment Georeference data for Africa
What do you mean by "georeferencing data"? What are you trying to do?
2d
comment Convert to lat-lon coordinates GDAL
Any chance of something smaller than 750Mb to download? Maybe just a few coordinate points in the given coordinate system?
Feb
4
comment Isochrones for public transport
Do you have public transport data? Or is that part of the problem? If so, then this is a big problem and will depend on where on earth you are.
Feb
4
comment Does this DXF file contain geolocation data?
Its not so much undefined as unspecified. If someone tells you the coordinates are EPSG:3857 or UTM Zone 8N or whatever then its easy enough to convert them.
Feb
4
answered Does this DXF file contain geolocation data?
Feb
4
awarded  Nice Answer
Feb
3
comment Asbestos roofs - orthophotomap
Have you done a literature search for "remote sensing asbestos roof"? Your internet search engine will find lots of things...