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Results tagged with coordinate-system
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user 960
A reference framework consisting of a set of points, lines, and/or surfaces, and a set of rules, used to define the positions of points in space in either two or three dimensions. This tag also refers to cartographic projections and coordinate system transformations.
6
votes
What is the right solution (and map projection) to compute distances between points located ...
Why try to project the data?
As mentioned in other answers there is mathematics to calculate distances on the speriod (I guess there is in ArcGIS too).
In PostGIS you have two choices. Use the geo …
- 13.3k
3
votes
Real-world example of Affine Transform?
From PostGIS doc:
"ST_Affine — Applies a 3d affine transformation to the geometry to do things like translate, rotate, scale in one step."
Here comes a quite dirty example.
Two years ago I used it t …
- 13.3k
6
votes
Calculating lat/lons from PostGIS table which has projected coordinate system?
I think ST_Transform is your friend.
- 13.3k