6
votes
If my geometry is stored in 4326 / WGS 1984 what should I transform to for the most accurate area in sq m?
Cast to geography and use use ST_Area to calculate area with units m².
SELECT ST_Area('MULTIPOLYGON (((-98.12317899283 26.29444331481,
-98.12355263136 26.29220720658, -98.1274736313 26.29279476234, ...
- 41.6k
4
votes
Accepted
Trying to determine which CRS this GML uses
Use projfinder.com. Stick your coordinates in the box, zoom the map to where you think the point should roughly be, click "Find My Projection" and it scans thousands of projections and sees ...
- 61.6k
3
votes
Accepted
Mathematical formula to convert lat-lon to Lambert Conformal Conic
So I've figured it out.
I had the right formula. To validate that, the projection wkt gives:
METHOD["Lambert Conic Conformal (2SP)",
ID["EPSG",9802]],
Which fits with ...
- 617
2
votes
Get adequate projected coordinate system from geographic coordinate system across globe with GeoPandas in Python
With recent (>= 0.9) versions of geopandas, GeoDataFrame has an estimate_utm method that should do just that, automatically.
- 143
2
votes
If my geometry is stored in 4326 / WGS 1984 what should I transform to for the most accurate area in sq m?
For highest accuracy, you would want to transform to a local coordinate system. For Texas it seems to be broken down into 5 state plane zones(EPSGs:32137,32138,32139,32140,32141).
But the easiest (...
- 745
2
votes
Coordinate system used in QGIS's Advanced Digitizing tools and how can it be changed
It will follow your Project CRS which is shown at the bottom right of QGIS window:
Just click on the CRS (the globe) and change it to whatever you need it to be changed, let's say WGS84:
The values ...
- 2,473
1
vote
Identify feature issue
In QGIS, one of the layers is always the active layer even if you do not select it and the selection is performed in the active layer. When you select any layer, you make it the active layer.
I used ...
- 74.7k
1
vote
Accepted
Drawing lat, lon grid over UTM project not working in QGIS 3.32
EPSG:5652 is not the best CRS to choose.
It has a False Easting of 32500000 (UTM is normally 500000), and has the co-ordinates reversed. That's why when you overlay the OpenTopoMap tiles, your tile is ...
- 2,485
1
vote
Accepted
Unknown Tobler W. Snow’s cholera map coordinate system (1992)
The coordinates are probably not in any commonly-defined coordinate system, but something specific to that data set.
Its possible the (0,0) point is at the bottom corner of the original map, or the ...
- 61.6k
1
vote
Difference in coordinates of a location in Google Earth and QGIS Canvas
Go to Project - Properties - General and change the display coordinates option to WGS 84 - degree. For more details, check the official doumentation.
- 15.5k
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