Questions tagged [precision]
The number of significant digits used to store numbers, particularly coordinate values.
97 questions
0 votes
0 answers
35 views
How to simpify a geodataframe geometries and preserve the contact between the polygons [duplicate]
I'm working with a map of the world from GADM dataset stored as JSON. The precision of the map is way too small for serving a web application so I would like to simplify it to 0.01° and thus reduce ...
- 3,460
0 votes
0 answers
124 views
Precise geodetic area calculation in hectares in EPSG:4326 using Python
I would like to calculate with Python the precise area (considering precision of 7 decimal places for coordinates) for area calculation for a MultPolygon layer using CRS EPSG:4326, without the need to ...
1 vote
1 answer
145 views
Converting ESRI FileGDB raster to vector without losing precision in QGIS [closed]
Using QGIS, I am looking to convert a raster to a vector so I can acquire the data at a polygon level to merge to another shapefile. The raster is an ESRI FileGDB format raster. The first problem I ...
- 11
3 votes
2 answers
444 views
How to reduce the precision of a shape without creating duplicated points?
I need to provide the description of a field to the EUDR reporting system. In the description of the regulation the rules specify "6 digits precision" on geospatial coordinates. As we are ...
- 3,460
2 votes
2 answers
548 views
Rounding vertices of polygon to fixed number of decimal places in QGIS
When I digitize a polygon and snap to existing features, sometimes the coordinates end up very slightly away from where I want them to be for example 15.000000099, rather than 16. Is there a way to ...
- 1,522
3 votes
4 answers
668 views
Reducing decimal places of coordinates in vector data using QGIS
I have polygon vector data, some of the polygons are imported from another 3D program (Agisoft Metashape). The imported polygons have up to 12 decimal places in the displayed coordinates (attribute ...
- 111
0 votes
0 answers
76 views
Navigating to a point with cm accuracy
I am due to install some monitoring points for a field experiment. I have a GNSS receiver (Arrow 100) and so can record the location of my monitoring points with a high degree of accuracy. I am ...
- 11
0 votes
1 answer
113 views
DCELL cell type is set automatically for raster after r.resamp.interp
After interpolation with r.resamp.interp with bilinear method DCELL cell type is set for raster. When I export it with r.out.gdal I get a precision loss error, as I export it as Float32 (PCRaster ...
5 votes
4 answers
743 views
Dropping nearly-identical point locations with GeoPandas
I have a GeoDataFrame (gdf) of several thousand point locations. I want to drop duplicate records from the gdf - that is, records with the same attribute information and the same location. However, ...
- 176
3 votes
2 answers
507 views
ST_ReducePrecision function does not work properly
I am trying to use ST_ReducePrecision to reduce the number of characters, because of the character limit in power bi cells. ST_AsText(ST_ReducePrecision(ST_Transform(geom, 4326), 0.000001)) The result ...
1 vote
0 answers
84 views
Changing number to bigger than 999 in QGIS
In QGIS 3.28 on Windows, there is a shapefile originally created in QGIS that was imported and worked on in ArcGIS. Now, when I reopen the file in QGIS, the real numbers have a width of 18 instead of ...
- 1,933
2 votes
0 answers
83 views
Does ArcGIS Pro have a tool like PostGIS ST_ReducePrecision?
Is there a tool in ArcGIS Pro to reduce the precision of a geometry in a dataset, similar to https://postgis.net/docs/manual-dev/ST_ReducePrecision.html? I want to use it on a file geodatabase dataset ...
- 317
3 votes
1 answer
281 views
QGIS input coordinate precision
I imported a point geometry layer into QGIS using a delimited text file (CSV) that contained the latitude and longitude values projected in CRS WGS84-EPSG:4326 with 6 decimal places (e.g. 38.145695). ...
- 33
1 vote
2 answers
271 views
Tell GeoPandas the number of significant figures to use when writing GeoJSON geometries
I have a GeoDataFrame gdf. I write its contents to a GeoJSON: gdf.to_file("example.geojson") which works. However, each geometry is specified to 16 significant figures, which is an overkill ...
- 3,360
1 vote
1 answer
99 views
How to store a featureclass's Domain, Resolution and Tolerance when migrating to PostGIS?
I'd like to copy a featureclass from an Esri Geodatabase into PostGIS and have it retain the Domain, XY Resolution and XY Tolerance values associated with it. I don't see a table in PostGIS (or in the ...
- 25.8k