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visits member for 2 years, 7 months
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Oct
14
awarded  Revival
Oct
10
comment How do I preserve measurement between QGIS and Google Earth?
None of those systems are very good to measure distances, one because it's in degrees, the other because it has big distortions. I would create the points using a a local EPGS (most countries have official Coordinate systems that minimize the distortions for a particular area), and then project them for display in Google Earth and Open Layers. This way the distance between points in the reality will be for sure more close to 1km.
Oct
9
comment Adding attribute columns together QGIS 2.4
ah... that I didn't know. Nice!
Oct
9
comment Adding attribute columns together QGIS 2.4
What is the type of your columns? To concatenate two string you should use || instead of the plus sign.
Oct
8
revised Loading same layers every time
added 59 characters in body
Oct
8
reviewed Looks OK Read DGN file in java or c#
Oct
8
reviewed Leave Open How to load Geowebcache tiles into OpenLayers 3 ?
Oct
8
reviewed Leave Open Similarity between two or more trajectories
Oct
7
comment Identify points in a shapefile that have no other point within x km with QGIS
Just click the gray tick mark below the voting of the question (to-left corner of the question). Thanks
Oct
5
revised Identify points in a shapefile that have no other point within x km with QGIS
added 97 characters in body
Oct
5
revised Identify points in a shapefile that have no other point within x km with QGIS
edited title
Oct
5
answered Identify points in a shapefile that have no other point within x km with QGIS
Oct
4
comment Cutting out depth information in raster. Calculating volume in Qgis
Can you explain what is @z#actual_range? I'm not getting it?
Sep
30
awarded  Explainer
Sep
29
reviewed Approve suggested edit on Bounding box of a set of MULTILINESTRINGs PostGIS
Sep
29
answered Bounding box of a set of MULTILINESTRINGs PostGIS
Sep
29
comment Cutting out depth information in raster. Calculating volume in Qgis
regarding NO DATA. That is something that only you can tell. a Does a value of -10998 make sense to you? are the positive values in the sea or in land?
Sep
29
comment Cutting out depth information in raster. Calculating volume in Qgis
If I'm correct, the r.volume will multiply each cell's value by it's size (area) to produce each cell volume, and them sum all the results. Using the expressions I propose this will re calculate the "useful" volume for your species.
Sep
29
comment Cutting out depth information in raster. Calculating volume in Qgis
@anina, notice that map algebra is a cell by cell calculation. The cases I presented are for each one of your bathimetry raster cells. In the final expression each cell is tested for each case and a new value is set.
Sep
28
comment Cutting out depth information in raster. Calculating volume in Qgis
No. When I'm referring to cell depth, I mean the sea depth (how many meters below the sea level). Also make sure that the -10898 value does not represent NO DATA instead of a really big sea depth.