Questions tagged [coordinate-system]

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.

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Different UTM limits

Why is there a difference of 4 degrees between the UTM North / South cut-offs? One might expect the North and South UPS grids to be symmetrical in coverage but they followed the UTM decision to stop ...
Roland's user avatar
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Which method to calculate distance from coordinates

I have a project to know the distance between two points (Long, Lat). The web app uses openlayers (CRS from 4326 to 900913). I have written a jupyter notebook to check the distance in python. https://...
michel webismagic's user avatar
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QGIS hexagonal grid size specifications

I am trying to understand how grid size/cell size is calculated while using "Create Grid" function in QGIS. According to https://docs.qgis.org/3.34/en/docs/user_manual/processing_algs/qgis/...
Jirka Panek's user avatar
1 vote
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Reproject large raster using Python

I have some large rasters that I want to reproject in a memory-safe way, using a second raster as a template . This code works nicely for smaller ones, but when they are large the Python kernel ...
TheRealJimShady's user avatar
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Coordinate conversion from Cape Datum to WGS 84

I am working with old borehole coordinates in the Mpumalanga region in South Africa. I suspect the coordinates are referenced to Cape Datum (Clarke 1880) before the Hartebeesthoek 94 datum was ...
Jordaan Fouche's user avatar
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1 answer
37 views

Problem with axis order in WFS with QGIS

I'm attempting to make use of some data from the Scottish Government's WFS server. But there is an axis order issue, I just want to check that it isn't something I've done before I raise an issue with ...
Ian Turton's user avatar
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Set projection with GDAL and Python of a raster file

I have the following script that allows masking pixels below a certain threshold for all TIFF files in a directory; the user should specify the path, the threshold, and the bund number. The output ...
Isa's user avatar
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QGIS - Unknown projection of Excel-based data

I have a database of coordinates of which the projection is unknown and I have to find out what it is. The coordinates are metric (so for example lat 388749, long 5014908); and they should refer to ...
robbie_maxwell's user avatar
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Projection failing for NetCDF file using NetCDF4 in python

I am trying to create a netCDF file from an excel sheet that contains precipitation data. The excel file is organized with latitude and longitude in columns: a column with latitudes, a column with ...
Idalh's user avatar
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Gott Goldberg Vanderbei projection using R

I want to know if it is possible to use R to generate a double sided disk projection discussed in https://arxiv.org/abs/2102.08176v1 . I am not familiar with GIS softwares but comfortable with R. ...
ajith's user avatar
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Selecting the right CRS for a KML file in Jupyter

I'm working with Ipyleaflet to display a KML file in a Jupyter Notebook I have the following in a cell: import fiona import geopandas as gpd from ipyleaflet import GeoData, Map, basemaps fiona....
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Google Earth Engine modify resample resolution units

My initial goal is to process the global GEDI 10m resolution canopy height data for 2020. I used a loop to cut the original image into 20° x 20° tiles and used convolution kernels to average and ...
THY111's user avatar
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Choosing projected coordinate system for Pennsylvania

I need to run some spatial analysis on a map of PA counties but I noticed there are two different State Plane systems (North and South). Which one should I use? In PA state/local GIS, which one do you ...
janza32's user avatar
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4 votes
2 answers
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OSGeo / PROJ - TransformerGroup Ordinality

My question is within the context of working with pyproj, the popular python package wrapping OSGeo's PROJ library, but it probably spills over into coordinate transformations as a whole and ...
Michael Di Felice's user avatar
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Misaligned coordinates

I am new to QGIS, and have just uploaded my first raster layer, plotting ecological data in Africa. However, I noticed that points above and below the equator appear shifted (see image). My CRS is ...
Dansmabentz's user avatar
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Converting latLng to screen point

I have a map in RN app on iOS and I have and overlay outside of the map Inside overlay I need to draw a View with some absolute position that will match some LatLng coords on the map I know screen ...
Sedoyjan's user avatar
2 votes
1 answer
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Is this KML file measured in degrees?

I'm working with a KML layer in QGIS. Here is the file: The KML file: <?xml version="1.0" encoding="utf-8" ?> <kml xmlns="http://www.opengis.net/kml/2.2"> <...
user1592380's user avatar
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Calculating area percentages of another vector file based on vector grid using ArcGIS Pro

I have a grid (vector file) in ArcGIS Pro, and I want to calculate the percentages of the area of different anthrome types in the other vector file (Anthromes 12K DGG Dataverse) for each grid cell. I ...
cloudberry's user avatar
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User defined transformation in QGIS

Is it possible to define custom transformations within QGIS, such as for user-defined CRSs? If this cannot be accomplished directly through the graphical user interface, might there be an alternate ...
phaarnes's user avatar
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1 answer
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r.out.gdal exports raster with projection but without extents

Exporting raster with r.out.gdal with PCRaster driver gives two files - .map itself and .xml with projection and colormap. But... I can't find the information about extent. Projection is EPSG:4623 (...
Nikolay Yasinskiy's user avatar
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QGIS Coordinate System in Layout manager does not work [duplicate]

When i am trying to set coordinate system to my project it does not show the proper coordinates of the area. I never had this problem before, can anybody tell me how I can change this? I always used ...
Max's user avatar
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3 votes
3 answers
281 views

How to define (not reproject) a CRS of a shapefile in QGIS?

I have a shapefile which comes with a wrong CRS and I would like to redefine the projection, so WITHOUT applying some transformation on the coordinates. In ArcMap you can do this with the 'Define ...
i.i.k.'s user avatar
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Deriving geocoordinates from objects on side-view drone image

I have the following metadata of drone images, that were captured at an angle: yaw, tilt, roll, absolute height, relative height, focal length, and the coordinates of the drone every view seconds. Is ...
simonericmoon's user avatar
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To project CRS or not (Is Karney geodesic distance as good as projecting and then using Euclidean)

I'm used to using GeoPandas where I open a file which is usually in EPSG:4326 and then projecting it using to_crs so that when I do any area or distance related calculations, they won't be distorted (...
Dean MacGregor's user avatar
3 votes
1 answer
80 views

Leaflet offset of tiled layer WMTS layer

Adding in Leaflet a WMTS layer with the 'L.tileLayer' to a COG Tiff results in an offset. Both services are in the same EPSG:2056 system This code <html> <head> !-- Version 2.0 --> &...
scriptDaddy's user avatar
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21 views

Reprojecting ASTER data (09XT) in ArcGIS

I have downloaded ASTER 09XT dataset which, when opened in ArcGIS, shows the datum as 'not specified based on GRS 1980 spheroid'. I tried to reproject the data in ARC 1960 and WGS84 datum. However, it ...
Sumit Dey's user avatar
1 vote
0 answers
30 views

Leaflet maplibre gl use custom CRS

I need to use CRS 2056 with leaflet and maplibre leaflet-maplibre-gl.js to display vector tiles. Using this code <html> <head> !-- Version 3.0 --> <!-- full stretch --> &...
scriptDaddy's user avatar
1 vote
0 answers
80 views

QGIS ellipsoidal area values changing very slightly between calculations while planimetric values stay the same

I have a number of vector shapefiles that I need to calculate the geodesic/ellipsoidal area for. These shapefiles are accessed and updated regularly, with the area recalculated each time they are ...
ecoQs's user avatar
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1 vote
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QGIS Australia GDA94 to 2020 Transformation File (NTv2_3>

I'm looking to convert some Australian GIS data from GDA 94 to 2020. The reprojection exists, but I need to use a particular transformation - specially NT v2_3 Conformal (this exists in ESRI). I ...
Amit's user avatar
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1 answer
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ArcGIS Arcade return x coordinate of web map feature from EPSG: 3857 to EPSG: 2227 [closed]

I'm using smart forms in ArcGIS Field Maps and I need to calculate the x coordinate in the feature layer's original coordinate system (California state plane III, EPSG:2227) when a new feature is ...
geoJshaun's user avatar
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1 answer
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Develop ECEF rotational matrix from NED aircraft yaw, pitch, roll

My goal is given an aircraft's latitude, longitude, altitude, yaw, pitch, and roll all in a NED coordinate system, produce a EFEC X,Y,Z location of the aircraft along with a 3x3 rotational matrix ...
Andrew King's user avatar
1 vote
1 answer
55 views

Is it possible to make a map projection where one area is comically large and in the center, and the north/south has rotated a bit? [closed]

I am looking to create a humorous world map projection where one location that is about 13 miles long and 3 miles wide is huge and takes up the entire middle of the map, with the rest of the world ...
CakesCakesCakes's user avatar
4 votes
1 answer
116 views

"Could not load source layer for INPUT" error when reprojecting flt-file with PyQGIS

The data I have are ESRI Floating Point Data (so they are a raster type). The path I provided is a fake path, so that I don't show my real system paths. I know that my code works with vector data, as ...
i.i.k.'s user avatar
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36 views

Plotting XY coordinates obtained from Google Maps

I know how to plot XY coords in ArcMap—right click the table, plot XY, select geographic coordinate system (coords are in degrees), etc. My question is rather when selecting the GCS I always go with ...
Geo_Brittany's user avatar
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48 views

Reprojecting layer from Gauss-Krueger to epsg:25832 (with example file to try)

I have a file which, when opened in QGIS, is shifted and has a lot of tarball-conversions suggested. However, none of them works correctly, meaning, when I load the data into qgis, then adding a ...
i.i.k.'s user avatar
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-1 votes
1 answer
38 views

Projection of CMIP data

How to get the spatial projection from NetCDF file in Python? I am working with CMIP6 data.
Jay's user avatar
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2 votes
1 answer
91 views

Selecting metres when using QGIS Points Along Geometry [closed]

I'm new to QGIS and have been trying to add points every 10m along a track using this older thread as a guide: Auto generating waypoints to a GPX file along track (hiking path - not as crow flies) ...
Tbizzle's user avatar
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Strange pixel column numbers in imported GeoTIFF file

I am loading a .d file (from SAR ceos file) with 11,000 pixels x 11,000 columns into QGIS 3.16.4. Perhaps this is a funny input format (not sure) but it appears that QGIS loads it well but reprojects ...
Marco's user avatar
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0 answers
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How can I export all the data from an image collection and add the coordinates as a band

I have a collection of data to which I apply several filters, when I try to export the coordinates of the remaining data after applying the filter, ALL THE COORDINATES appear, I only need the ...
MAURICIO ANDRS MERCADO IMITOLA's user avatar
1 vote
1 answer
26 views

Proj Oblique Mercator two-point method very useful?

I am happy with Proj oblique Mercator Azimuth (+alpha) method, but I am also itching to try the two points method. But just like @ralph-tee showed in https://gis.stackexchange.com/a/337169/77230 , the ...
Dan Jacobson's user avatar
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34 views

Why do bmp files plot in wrong spot in QField?

I'm relatively new to QField and have successfully packaged a project to QField. However when I opened it, most layers have displayed correctly except for some bmp layers - these have plotted in the ...
Christie's user avatar
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33 views

How to get crs_description from EPSG-Code?

I'm searching for an expression in QGIS to get the description of a CRS Assume I have following table: Area EPSG desc A1 EPSG:31258 A2 EPSG:31255 Now I want to fill in the "CRS-Description&...
Stefan's user avatar
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3 answers
71 views

After converting CSV file to polygon, polygons are not falling on correct location

I have a CSV file with records in below format. area confidence boundary 159.1512 0.8084 POLYGON((87.7185491791352 22.5667828312016, 87.7184590804737 22.5667864311825, 87.7184519272495 22....
gis's user avatar
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-1 votes
1 answer
69 views

PyQGIS: Transform Lat-Long CSV into a UTM project

I have a UTM project in QGIS and need to import some CSV files that are in Latitude Longitude format. When I import it using the GUI, it knows that it is in CRS: 4326 and does a ballpark reprojection ...
JeffF's user avatar
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0 answers
17 views

Soil moisture index from European drought observatory

For my current task, I am using the soil moisture index data from the European Drought Observatory. In the download section, the data is natively provided in the Lambert Azimuthal Equal Area ...
Shaz's user avatar
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-1 votes
1 answer
50 views

Shoot a point from another point

How do I shoot a point directly north 3,000 feet from the corner of a polygon in ArcGIS Pro in WGS 1984 Web Mercator (auxiliary sphere)? I start by going to Edit --> Create and choose Point at End ...
TheOmoSlide's user avatar
1 vote
1 answer
72 views

Defining “Unknown Coordinate Systems” for converting from ArcMap to ArcGIS Pro

I’m helping my organization convert from ArcGIS Desktop 10.8 to ArcGIS Pro 3.2. We have a local site-specific X, Y, Z coordinate system, in engineers feet (feet in tenths), based on a main datum (...
ArchaeoGIS7's user avatar
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45 views

Setting custom CRS using PyQGIS

I have a PyQGIS-script which reprojects to EPSG:25832. However, it needs some adjustments in the false_northing and false_easting parameters, therefor I tried to create a custom CRS with adjusted ...
i.i.k.'s user avatar
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0 votes
2 answers
91 views

Reprojecting to EPSG:25832 using PyQGIS shifts layer

I have a shapefile with the following CRS specified in the prj. file, and I think it is ESRI:31493 : PROJCS[ "Germany_Zone_3", GEOGCS[ "...
i.i.k.'s user avatar
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0 votes
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23 views

Translating (cropping) a GeoTIFF file to a specific extent but ending up with a different final extent

I'm trying to crop a larger GeoTIFF file to a smaller extent. The darker GeoTIFF file in the middle has the extent I want to reproject to. I've used the following command to do the translation: ...
Jamess11's user avatar

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