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Results tagged with coordinate-system
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user 25521
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.
1
vote
Azimuthal equidistant projection for small distances (<10km)
If you are going to use the projection within a radius of 10 km, the error from Earth's curvature is going to be negligible.
The scaling of distances measured along circles of equal distance from the …
- 1,314
2
votes
Accepted
Lat/Long converter to local coordinate
What you are looking for is a cartographic projection, the choice of which is a study area on its own; the accuracy of the projection depends on the area you are mapping and the type of distortion you …
- 1,314
3
votes
Project a set of coordinates - points from Excel to a shapefile with unknown coordinate syst...
It seems the first dataset (vista_nicosia_links.shp) is using a different projection, most likely UTM (the zone depending on your data's location - for Nicosia, it is most likely UTM Zone 36 North).
…
- 1,314
3
votes
Accepted
Using mathematical hack (EPSG 4326 to EPSG 3395)?
(First, to clarify: you do not need to care about UTM zones because World Mercator is a global coordinate system - just far less accurate than UTM.)
You are essentially performing a linear approximat …
- 1,314
1
vote
Accepted
Displace Lat/Long by meters
I don't see a (big) problem in your approach. UTM projections are well defined even outside their intended zones, only the projection distortion is a bit higher - but still small enough not to manifes …
- 1,314
1
vote
Accepted
User defined Coordinate Reference System (CRS) in QGIS is not located where expected?
I'm not really sure the data you got is correct. IMHO, the projection provided is Krovak S-JTSK, which was designed to be used in central Europe's Czechia and Slovakia, which is all but Australia.
I …
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2
votes
Appropriate equal-area cylindrical projection for Southeast Asia?
The wizard suggests the Lambert equal-area cylindrical projection whose distortion does not change with the choice of central meridian. The projection is a cartographically sound choice for your area, …
- 1,314
5
votes
Difference between converting a projection into WGS84 first before converting it to a intend...
To add to the answers of @GeoMonkey and @Babel and sum them up, there might be the following sources of additional error when using the two step transformation:
Two rounds of transformation always in …
- 1,314
0
votes
Indoor map with relative coordinates
You need to play with false northing/easting, leaving the UTM parameters otherwise intact. If the bottom left corner is (5000,10000) in the corresponding UTM (in meters), just subtract 5000 from false …
- 1,314