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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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[ "...
1 vote
0 answers
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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 --> &...
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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 ...
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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 ...
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ArcGIS Arcade return x coordinate of web map feature from EPSG: 3857 to EPSG: 2227

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 ...
-1 votes
1 answer
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Projection of CMIP data

How to get the spatial projection from NetCDF file in Python? I am working with CMIP6 data.
1 vote
1 answer
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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?

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 ...
0 votes
1 answer
601 views

ArcMap - Define Projection on raster with "Unknown Spatial Reference" results in empty geometry

I typically don't use ArcMap (and so my skill level in using it is low) but use R instead, but for a validation process I need to compare outputs between ArcMap and R. As part of a small step in this ...
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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 ...
3 votes
3 answers
5k views

Stripping spatial reference from raster using ArcGIS Desktop?

I am creating an exercise for remote sensing students and would like to take an existing raster and remove the spatial reference from the file so that the students can practice using another image to ...
3 votes
1 answer
103 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 ...
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1 answer
653 views

ArcGIS Pro: Raster Layer in Incorrect Location

I have a very large raster layer (67g uncompressed) that was merged from multiple tif files in ArcGIS Pro. However, I have not been able to get it in the correct location (USA) and it is displaying ...
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1 answer
163 views

Choosing projection system to use when georeferencing PDF maps

I need to georeference a PDF map and digitize the features on the map into a shapefile using WGS84. Is it best to georeference the PDF map and digitize the associated features in a local projection ...
2 votes
1 answer
525 views

ProjNet error in converted coordinates

today I discovered this library, but after trying to convert coordinates from one to other system find out that there is some calculation error. I googled possible solutions for this problem, but ...
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1 answer
164 views

Reverse Geocode to zip+4 or Zip+2

There are various methods to reverse geocode from coordinates(latitudes, longitudes) to 5 digit zips or census tracts/blocks. For example geopy.geocoders.Nominatim and FCC census API. However it is ...
2 votes
1 answer
248 views

Using spTransform CRS in Leaflet

I am producing Kernel density estimates for animals from tracking data. Location is input at x y data, I produce a spatial polygons dataframe from these coordinates. xy<-id[c("X", "Y&...
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1 answer
366 views

GeoDjango geometry transform method is swapping x with y

I need to convert a geometry from srid 4326 to srid 3857: myPoint4326 = Point(x=-73,y=40, srid=4326) myPoint3857 = myPoint4326.transform(3857,clone=True) print(myPoint4326.wkt) print(myPoint3857.wkt) ...
3 votes
3 answers
3k views

EPSG codes for projections to use when computing the area of global polygon sets in python env

The general answer to this question is "Use any equal area projection in units of meters that covers the world". Python code needed to make use of this is short and sweet: import geopandas as gpd ...
2 votes
1 answer
168 views

Parsing Compound Coordinate Systems from file

I'm trying to programmatically extract the coordinate system, preferably in EPSG code(s), from a series of files some of which have a compound coordinate reference system. I've noticed that when I ...
0 votes
1 answer
545 views

SQL Server: Coordinate conversion from NZTM to WGS84

I got a table that has shape value in one of the columns. I am converting shape value into geo_json formate and calculating centroid value and saving in two columns. The coordinate system of shape ...
0 votes
1 answer
223 views

GeoTools: Geo Transform incorrect

I am transforming a coordinate between Lambert Conformal and WGS84. The values returned by GeoTools do not seem correct. From: PROJCS["unnamed", GEOGCS["Coordinate System imported ...
1 vote
2 answers
211 views

Loading and reprojecting .nc file without projection

I am trying to extract some bands from a .nc file. I don't know the file projection (if there is one), thus I created in GRASS GIS a newLocation with no projection (just a XY Cartesian plane) and ...
0 votes
0 answers
43 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 ...
0 votes
1 answer
466 views

Getting proj string from cartopy CRS

I'm trying to get proj strings from cartopy crs', such as cartopy.crs.PlateCarree(). I can manually infer the proj string from the init() function in the source code but I need to query it, so I can ...
1 vote
1 answer
227 views

Export image: Error: Internal error. (Error code: 13), I used my code many times and suddendly it stoped working

I want to export Sentinal 1 images to my drive. My shapefiles are in ESPG:4326, the images are in different systems, and I want to project the images to ESPG:3995 while exporting. The code was working ...
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28 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 ...
-2 votes
1 answer
2k views

Projection parameters from WGS84 UTM37 to Ain El Abd UTM37 and the reverse

I am developing application using JavaScript apis, I want the correct projection parameters to convert from WGS84 UTM37 to Ain El Abd UTM37 and the reverse. When I click in the map I get Ain El Abd ...
1 vote
1 answer
360 views

rasterio reproject space value

I am using rasterio to reproject data from UTM to lat/lon. The reprojection work, but it creates projection space, with values of 0, which becomes a problem when I display the data, because some of ...
1 vote
1 answer
202 views

Synchronize Coordinate System in ArcGIS Pro

I have a map created in ArcGIS Pro ver 2, on the map the area of interest on the Layout Frame has a coordinate system of GDA94 MGA Zone 56. On the Content Pane, the Map Grid is in MGA Zone 55 and the ...
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1 answer
1k views

Downloading WikiMapia in Google Earth

Previously I was able to download the WikiMapia KML and install it in Google Earth perfectly, but right now it is not working with me. Is there any new update or new link that I'm not aware of?
1 vote
1 answer
342 views

Converting elevation between NAD27 and NAD83

I am working with a large dataset which has datum in NAD27 and NAD83. I needed to convert the northing and easting coordinates with the NAD27 datum to NAD83 datum using Geopandas, which I was able to ...
1 vote
1 answer
128 views

Incomplete set of least cost paths in R

In R, generate a conductance raster with "square" cells, derive the centroid of each cell, and compute the least cost paths (LCPs) between each pair of centroids through any of the possible ...
2 votes
1 answer
88 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) ...
0 votes
1 answer
288 views

Defining Geographic Transformation in Project Raster using ArcGIS Pro

I am using ArcGIS Pro 2.9. I have a raster in D_NAD_1983_2011_Transverse_Mercator and wish to project it to WGS_1984_UTM_Zone_12N so I may export this projected raster as a .tif file. I have tried ...
3 votes
2 answers
87 views

Wrong parameters when georeferencing single drone images

I am using a DJI Mavic 3M drone to capture images from the ground view. DJI provides a guide on how to correct the images for the lens distortion. Each captured image contains XMP metadata about the ...
0 votes
1 answer
3k views

ArcMap "datum transformation is expected, but the parameter is empty" projection error

I have a feature class in GCS North American 1983 that I need to convert to US National Atlas Equal Area. When I try to use the Project feature in ArcToolbox, after selecting ...
23 votes
12 answers
7k views

Discontinuous or Interrupted map projections

Do any of the current open source GIS softwares support discontinous projection systems e.g. sinusoidal, dymaxion, butterfly, etc? If not, are there any affordable commercial ones that do (affordable ...
1 vote
1 answer
517 views

Viewing 3D shapefile in QGIS

I have 3D shapefile which displays fine in QGIS 2D (and 3D in ArcScene), but I am having trouble changing to 3D view in QGIS. Shapefile is an imported polygon set (in a local CRS) > I get the ...
1 vote
1 answer
3k views

Reprojecting unequal number of latitude and longitude: pyproj.exceptions.ProjError: x, y, z, and time must be same size

I have a rectangular matrix of geographic climate data with a 1d row of latitude coordinates (size=834) and a 1d column with longitude coordinates (size=1115). They are both in unit of m (EPSG:32630) ...
1 vote
1 answer
51 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 (...
2 votes
1 answer
452 views

Creating an oblique Mercator projection using proj and QGIS

I am trying to create a coordinate system within QGIS that's aligned with a great circle between two points. The points defining the great circle are (-44.0597,168.7192) and (-42.7365,171.4428) and, ...
1 vote
3 answers
612 views

Why does DotSpatial return NaN for point reprojection?

From the master branch and examples @ https://github.com/DotSpatial/DotSpatial the following fills the xy array with NaN but we expect 1755668,5922511 Dim x As Double() = {2666109} Dim y As Double() =...
1 vote
1 answer
266 views

List supported WKT spatial references in GDAL, c++

I would like to ask if I can retrieve a list of supported projections from GDAL API. I am trying to use GDAL to coordinate transformation for my internal data in the following way. struct MyConverter {...
0 votes
0 answers
50 views

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 ...
3 votes
1 answer
300 views

Web maps using Oblique Mercator or other alternative projections?

I'm working toward creating a series of web maps involving relations between Canada and the Asia Pacific. The standard Spherical Mercator projection supported (exclusively it seems) by all major web-...
1 vote
0 answers
96 views

Oblique Mercator Distorts Edges of Map

I'm learning how to use Oblique Mercator projection in QGIS 3.4.7. I created a custom projection with "omerc" and passed two points (New York City, USA and Tokyo, Japan) as the parameter. Extent: ...
3 votes
1 answer
722 views

Converting map to use space oblique mercator projection using ArcGIS for Desktop?

I have a map document in ArcMap which I want to convert to using Space oblique mercator projection, but I am not sure if ArcMap supports it. Any hints on how to achieve this?
1 vote
1 answer
25 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 ...
2 votes
1 answer
258 views

proj: Oblique Mercator specifying two points on central line

I'm trying to use Oblique Mercator in QGIS 3.4, which uses proj to calculate coordinates conversion. I specify two points in the central line, rather than specifying the center and alpha. Oblique ...
2 votes
1 answer
656 views

Produce Oblique Mercator Map

To avoid the possibility of opinions, let me rephrase the question. Which software packages are able to produce an Oblique Mercator map between any two arbitrary points, similar to what is offered in ...

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