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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Create custom coordinate system from Microstation data

I have the custom coordinate system data below from Microstation, but I don't know how to transform this data into parameters in QGIS customer coordinate system dialog box. Is there a tutorial or ...
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Map projection from latitude/longitude to cylindrical system [closed]

I have some questions about projections. First of all, I would like to plot some positions on a x-y grid, graduated in km from latitude/longitudes coordinates. Is this conversion relevant: https://en....
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Raster DEM projection rendering problem

I am new to QGIS and am using it primarily for the DEMto3D plugin. My use case is creating STL meshes so I can CNC carve scale models of the landscape features as art pieces. I purchased one meter ...
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Incorrect coordinate translation using GDAL.NET compared to gdaltransform and epsg.io

I am working on a project to convert between one coordinate system, provided by an EPSG code, and EPSG:4326 or EPSG:4979 (WGS84 CS to include heights above ellipsoid). Testing the following ...
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Calculate TMS tile coordinates (XYZ) for a given LatLng pair in ESPG:27700 projection?

I am new to GIS in general and struggling with the correct approach to achieve my goal. I have a list of 100,000 or so Lat/Lng taken from a GPS and I need to retrieve the singular tile for each of ...
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Getting TomTom Traffic API XYZ data to display on map

I am using TomTom API to retrieve Traffic Data https://api.tomtom.com/traffic/map/4/tile/flow/relative0/12/1207/1539.png?tileSize=256&key=***** However, there is no coordinate reference system ...
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QGIS visualization of Pleiades image is gray and fixed only when copying style

I have airbus Pleiades images which has 4 bands - B , G , R and NIR. The image was reprojected (4326) and resampled (50cm) using GEE as following: task = ee.batch.Export.image.toCloudStorage( ...
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From UTM to long/lat [duplicate]

I have a set of points expressed in the UTM zone 32N EPGS:32632 WGS84 and I would like to obtain long/lat expressed in -90/90 180/-180 degree. Is there a way to obtain it with Qgis? For instance:
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Pixels not matching with GDAL projection of Modis LST hdf data [duplicate]

I have used the following the commands to project MODIS LST .hdf data through GDAL in cygwin: gdalwarp -r bilinear -of GTIFF -tps -t_srs '+proj=utm +zone=29 +datum=WGS84' HDF4_EOS:EOS_SWATH:"...
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Extract NDVI value for polygons using Sentinel-3 OLCI collection

I'm using GEE to calculate NDVI index from Sentinel-3 OLCI collection and then I would like to extract mean values of NDVI for polygons. In first step I create the mask out water and cloud pixels. In ...
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QGIS Transformations with respect to desired epoch

This query is concerning transformations in QGIS. I have done some checks to find out how transformations are applied in QGIS, but the results indicate that the EPOCH is not applied. ie. GDA2020 is ...
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Transformation from Lambert azimuthal equal-area to WGS84 uncovers polar region

I'm having an issue where a transformation from a projected coordinate system (Lambert azimuthal equal-area) to WGS84 changes the shape of my polygon near the polar region. The real data creates a ...
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Combine a polygon map on top of a raster map in R

I would like to combine a shapefile map of some US states on top of a raster map obtained from using library ggmap. This is the code I have library(USAboundaries) library(ggmap) library(ggplot2) ...
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How to convert this video into 360 VR panorama?

This video shows Huygens probe descent to Titan moon from two different points of view: https://sci.esa.int/web/cassini-huygens/-/39218-huygens-descent-to-titan-surface The white dots on the upper ...
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Checking if a raster is unprojected

My script should stop if the file I read is unprojected. What is the easiest way to do it with gdal Python binding ? PS: I know (I will post it as an answer) how to do it using rasterio but it's an ...
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Convert a body vector relative to an aircraft, to a vector in ECEF space

I am trying to solve for a problem where an observer is on an aircraft with a given pitch, roll, and yaw. The observer is looking at an object which produces a line of sight vector that is measured ...
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Why do my GPS coordinates show up on the wrong side of the location (Boa Vista) in QGIS 3.28? [closed]

I am doing my QGIS map but for some reason my GPS coordinates are on the "right" side of Boa Vista Island (Cape Verde) instead of the "left". Checked the coordinates many times, ...
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How to convert shapefile geo-cordinates to a specific location with 3 reference geo-cordinates?

What I have is multi-layer drawing file for a locality in India; with help of a conversion utility got a working Shape-files of it. Issue is original drawing file is not Geo-coordinated hence Shape ...
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Coordinate scale different (much smaller) than map

I've set up a new project with the CRS set to WGS84 (EPSG:4326). Then I added a google map and a CVS with my Lat/Lon coordinates in degrees. there is nothing else in the CSV other than the header. At ...
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Convert NAD_1983_ALBERS to WGS 84

Recently I am working with US wetlands data, https://www.fws.gov/wetlands/Data/State-Downloads/NJ_shapefile_wetlands.zip Data is in NAD_1983_ALBERS projection, and I want to transform it to lat/long ...
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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 ...
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How to set SRID of the geometry attribute of GeoServer layer (automatically or through code), instead of -1 default value

Because of my problem with spatial queries (INTERSECTS) not working properly on a layer with SRID = -1 created with ogr2ogr - I need to force SRID of the geometry attribute of the layer to be ...
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Reprojecting from EPSG:6931 to EPSG:3857

I am working with weekly Arctic Sea Ice Thickness Maps derived from CryoSat-2/SMOS Data Fusion (https://data.seaiceportal.de/gallery/index_new.php?lang=en_US&ice-type=extent&active-tab1=...
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Converting bounding box with relative coordinates into absolute ones

I have run the yolov5 model to predict trees in imagery with a geocoordinate. I got the bounding box objects with relative coordinates after running the model. I would like to have these bounding ...
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Graticules on Mollweide projection in QGIS layout

I am trying to prepare a layout in QGIS of a world map, projected in the Mollweide World projection ("ESRI:54009"). When I add a grid, and set the grid CRS to "Default CRS EPSG:4326&...
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Assign coordinate information from a georeferenced TIFF to a CSV file of exactly the same area

Say I have a GeoTIFF that covers an area of 2000mx1000m. The GeoTIFF is 2000x1000 pixels. It has been exported from QGIS. In another software package (with no georeferencing) I import this GeoTIFF as ...
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How to draw point on map with R? Wind Rose onto Map

I need transpose Wind Rose onto Map by image addition. I attempt to implement this code: particolato <- read.csv('Acri_PM.csv') Rose <- subset(particolato, wd != "") #remove blank ...
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Warp Natural Earth raster without losing resolution

I'm trying to make a world map using Pseudo-Mercator projection (3857) and Natural Earth's 1:10m raster in QGIS. However, Natural Earth apparently doesn't like Mercator, so it cuts the extent of the ...
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How to fix 'BOOM! Could not generate outside point' error when using ST_Distance_Spheroid with different SRS in PostGIS

I am trying to calculate the nearest feature distance from a point using PostGIS ST_Distance_Spheroid function. Case 1: The point and the feature collection are in the same SRS and I am expecting the ...
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Plotting data on a Fuller-like projection

I really like the "one island" approach of the Fuller and AuthaGraph projections, seen below. My goal is to plot points (e.g. cities), shapes (e.g. modern and historical countries) and data (...
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Buffer is not yielding the appropriate size in QGIS

I am trying to create a buffer of 10 kilometers around each dot already uploaded. The problem is that these buffers seem to be unreasobly larger than 10km. (Portugal). I have tried to use multiple ...
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Compute the area of differents buildings for differents regions in GeoPandas

I'm really new to GeoPandas so this question may have already been answered (I hope not). I have a GeoPandas dataset with points that represent the coordinates of buildings and I would like to ...
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EPSG code has stopped working with pyproj.Transformer.from_crs, but still works with pyproj.transform and pyproj.Proj

My code: from pyproj import Proj, Transformer EASE_Proj = 'EPGS:3409' WGS_Proj = 'EPSG:4326' transformer = Transformer.from_crs(WGS_Proj, EASE_Proj) Suddenly produces the following error after ...
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Couldn't find coordinate system NRW Netz zone 2 in Metashape

I have photogrammetry data from Germany, I got information of the coordinate system used in this project for Ground Control Point (GCP) is NRW Netz77 zone 2. I couldn't find anything on epsg.io or ...
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Exporting to TAB in QGIS results in misalignment

I've got a reoccurring problem when exporting a layer from QGIS as a TAB file. In the attached image, the red polygons are the original layer and the purple is the result of exporting to TAB. The ...
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Why does the UK look different in some maps?

Sometimes when I create maps the UK seems to look like it's tilted back, other times it appears "flat". The projections are the same (OSGB 1936 / British National Grid). I am using QGIS. Any ...
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Reprojecting results in invalid geometries

I have a GeoJSON file that contains some buffers in WGS84 EPSG: 4326 and I am trying to reproject it to WGS84/UTM zone 32N EPSG: 32632. I am using GeoPandas to do it with the to_crs method, but the ...
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QGIS Profile Tool displaying inconsistent horizontal axis values

I am analyzing stream channel gradients on Mars. The workflow is essentially to grab a Mars DEM from the HiRISE website, reproject it into ASU's preferred Mars 2000 CRS, use the SAGA Basic Terrain ...
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How to infer a given (EPSG) projection property: is it area-, scale- or distance-preserving?

Imagine you are given a EPSG:abcd crs code, and would like to know the properties of that crs, i.e. you want to know whether it is area-, distance-, scale-preserving etc. Are there tools (ideally in R)...
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Decode SQL Server encoded locations with PostgreSQL

I imported the Adventureworks database to PostgreSQL and I can't find a description how to decode the spatial location data - 2 example entries look like this: ...
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Incorrect WGS84 to UTM conversion in GeoPandas to_crs and estimate_utm_crs

Does anyone ever encounter this weird inconsistency in GeoPandas to_crs and estimate_utm_crs: import utm import numpy as np import geopandas as gpd from shapely.geometry import Point for lon in range(...
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Setting Layer CRS sends layer to wrong location [duplicate]

I have a recurring problem where setting a layer's CRS sends the layer to the same incorrect location. WGS84 sends the layer to the ocean south of West Africa. British National Grid sends the layer to ...
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What coordinate system uses three places for decimal minutes for longitude values?

I have data from a navigation unit that is reporting coordinates where the latitude is in a familiar decimal minutes format (e.g., 26° 14.12345’) that never has the number of places (I,e., the 14 in ...
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EPSG.io API for PROJ definitions

I am trying to use the EPSG.io API to retrieve PROJ definitions for a CRS. I know that they provide them in their website but the API only seems to be able to retrieve in WKT or GML format. Is there a ...
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Transforming point from EPSG:3844 to EPSG:3857 with proj4js

I'm having an issue transforming a point from EPSG:3844 to EPSG:3857 using Proj4JS. The transformation it performs seems off compared to the result given by PostGIS, pyproj, rgeo-proj4 or even epsg.io....
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GeoServer WFS 2.0.0 Default CRS

I'm trying to retrieve DefaultCRS for one layers from WFS 2.0.0. For the moment, only way I find is to use GetCapabilities and reduce the xml file by setting the sections like that : https://wxs.ign....
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Using CQL filter with different CRS than layer WFS 2.0.0

I'm trying to implement spatial cql_filter such as 'intersects' for version 2.0.0 of WFS from GET or POST HTTP request. A working way of doing it, is by the URL below: "https://wxs.ign.fr/...
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Georeferencing using coordinates always corresponds to wrong location on reference map in QGIS

This is the map that I tried to georeference using its coordinates, e. g. -98.00 E and 16.00 N Both maps are on the same projection. However, no matter what coordinates I enter, they always ...
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Georeference historic/medieval map

I have a historic map similar to Sexta Europae tabula, with a seemingly degree-based coordinate system marked along the border. Wikipedia suggests that this could be the one Ptolemy used in his maps (...
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Coordinate system broadcast by TxDOT NTRIP provider

I am processing images in Agisoft Metashape. Images were collected in the Corpus Christi, TX area using TxDOT NTRIP Provider (RTN). In Agisoft Metashape, on the 'Reference Settings', I need to specify ...

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