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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Projecting rasters, shift to the north

I would like to project one raster onto another and while doing so I think the values are changing their position "to the north". Is this an expected behavior? I was hoping to create a ...
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Transform shapefile in UTM-Zone32N to UTM-Zone33N in QGIS

I'm using corine data, which I have downloaded for Germany with the following KBS: EPSG:32633 - WGS 84 / UTM zone 32N - Projiziert https://land.copernicus.eu/pan-european/corine-land-cover Now I want ...
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Transformation of coordinate systems [closed]

I need to transform the layer coordinate system from 2180 (ETRS_1989_Poland_CS92) to 5514 (S-JTSK_Krovak_East_North). I tried to do it using Qgis 3.2.3 (save as with new coordinate system 5514), and ...
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Exporting data from points to a polygon

I'm new on GIS. We were migrating from an old map program to QGIS. My problem is that I need to have Polygons with data. And I have the information that I need in the polygons in "entities" ...
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Projection systems mismatched

I was planning on importing a temperature file (in NetCDF format) as a raster layer. Here is the link of the temperature data (https://psl.noaa.gov/data/gridded/data.cpc.globaltemp.html). The data ...
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How can I get QGIS Difference tool to operate on different CRS? Or can I project a polygon to go "off the side" of the map to the other side?

I am attempting to map arctic regions. I have a predetermined area off the coast of Alaska that has longitudes both negative and positive. In a north pole azimuthal equidistant projection, it looks as ...
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Reproject Google Earth Engine Nearest Neighbour

I’m trying to resample all the bands of the image. However, I have read that if you want to resample an image by the use of NEAREST NEIGBOUR, you have to used .reproject method. https://developers....
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Get element in raster array based on BNG coordinates

I have some BNG coordinates which are converted from lat and long using proj4. I also have a raster file based on BNG. I want to get the relevant element from the raster array based on the coordinates ...
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Reprojecting (warp) raster changed the values of the reprojected raster QGIS

The reprojection of a raster containing slope data from CRS:4326 to CRS:25830 resulted in a change in raster values. When I add the reprojected raster over the original one and use the identify ...
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Understanding TIFF file georeferencing

I am new to maps and ArcGIS field, and having some issues understanding the used georeferencing systems, I have a dem.tif file, when extracting information I get X and Y in very large number, I used ...
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CRS not working as it should when exporting

My QGIS is displaying as being in British National Grid, however whenever I export data and open it up elsewhere the projection displays as longitude/latitude. Does anyone know why this happens and ...
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QGIS : EPSG4326 : arc of circle with X radius centred in Z (aviation)

I am trying to make a polygon from the aviation LPPO FIR (Santa Maria Oceanic Flight Information Region), that some portion is described as "arc of circle with 100NM radius centred at PST NDB (...
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Wrong CRS being displayed

In my version of QGIS the British National Grid is currently set as OSGB36 however it needs to be OSGB1936. Does anyone know how I can change this? I have searched for it in the filter bar but it ...
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Order of latitude and longitude in EPSG:4326

I recently started working with GPS data in PostGIS and am very confused about the order of latitude and longitude. I'm from Europe, and here everyone I know uses latitude first, longitude second, e.g....
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Why referenced or derived mosaic datasets do not project rasters of different coordinate system correctly on-the-fly?

I am using ArcMap. I have many mosaic datasets in a projected coordinate system and I would like to project them into another projected coordinate system (different datum), but without locating and ...
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Parameters of the coordinate system for calculating the rotation of labels along latitude lines

I'm making a map of a rather large region and I need to set the angle of rotation for the labels so that they are parallel to the lines of latitude. I do it in three steps: I take the central ...
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Hobbs, New Mexico United states [closed]

How do I set all the measurements to imperial? Everything is in metric I need imperial Ft, miles etc Every single thing is metric this includes all distance mesasurement, accuracies, everything is ...
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Incomplete .prj file created when .mxd is opened

I have a single .mxd file that, when opened, creates a projection file (.prj) in the same folder as the .mxd file. This does not happen with other .mxd files. This projection file is called ".prj&...
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How to convert osmium.osm.location cordinates to normal format coordinates in python(Pyosmium)

I have extracted the coordinates data from nodes using pyosmium. Though I was successful in extracting the data but the coordinates which osmium is giving is not in normal format, I tried to convert ...
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Zero-width buffer trick makes the Caspian Sea disappear (using R)

I am new to plotting with coordinate systems. I am trying to generate a Pacific-centered map, and am using this wonderful code as a starting point. I have a bunch of data points from databases I'm ...
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SVG projection with mapshaper from OSM GeoJSON

I am converting boundaries queried with overpass-turbo (GeoJSON) into SVG with mapshaper. The resulting SVG has a with of 800 (mapshaper default, pixels) and a height of 520 - the resulting map seems &...
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Area elements in standard geographic coordinates [closed]

I have a need to do some integration/summation over gridded weather data (rainfall), in standard geographic coordinates. I therefore need to calculate area elements associated with each of my grid ...
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How is datum used in assigning lat and long to point on Earth's surface?

It's accepted wisdom that geographic coordinate systems require a datum in order to assign lat/long to a point on Earth's surface. However, every point in 3d space already has 3d polar coordinates ...
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Is there any known incompatibilites between projections in QGIS 2.18 and QGIS 3.16?

I have a project on QGIS 3.16 with a shapefile of forest remnants from a given Environmental Protection Area in Rio de Janeiro, Brazil. The shapefle seems fine when used over a basemap and it appears ...
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Projected coordinate system for Sierra Leone

I am using geographic datasets of households (clusters) and mines in Ghana,Sierra Leone, and Liberia (I am analyzing each country separately). I am trying to calculate the distance between each ...
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Changing projection of QLR file in QGIS

I have converted a ESRI .lyr file to a .qlr file in QGIS using the SLYR plugin. However, it does not give me the option to redefine the projection. If I change it in the traditional format by ...
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Geotools Transform to new coordinate system not working

I'm trying to convert from EPSG 26191 to WGS, here is the code im using to transform but it still prints for me when I get the SRID as 26191. CoordinateReferenceSystem sourceCRS = CRS.decode(&...
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Choosing correct CRS to calculate distance and create buffers for datapoints in Ghana [closed]

I am using geographic datasets of households and mines in Ghana,Sierra Leone, and Liberia (I am analyzing each country separately). I am trying to calculate the distance between the clusters and the ...
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Converting from esoteric coordinate systems to EPSG:4326 WGS 84

I have a shapefile with coordinates in the "EPSG:3081 NAD83 / Texas State Mapping System" coordinate system. I'd like to be able to convert these to EPSG:4326 WGS 84 and it's not clear how. ...
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QGIS EPSG 3412 stereographic project doesn't work

I've downloaded ozone maps from NASA Earth Observation site (https://neo.gsfc.nasa.gov/view.php?datasetId=AURA_OZONE_M&year=2019), it's in EPSG 4326 - WGS 84, and I would like to project it ...
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Unable to execute spatial join after CRS transformation in GeoPandas

I'm trying to join a points GeoPandas GeoDataFrame with a polygon GeoDataFrame, but I'm getting an empty results (inner join). The points GeoDataFrame I'm loading it by using latitude and longitude. ...
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Drawing lines above map in projection

I am showing sun direction on the map, knowing sun's azimuth and elevation. Using this function final num _RADIUS = 6371e3; // meters LatLng destinationPointByDistanceAndBearing( LatLng l, ...
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Find a new geo coord moving a given distance and angle from a previous point

I'm not interested in plotting or converting to Cartesian, just following a traverse from one lat/lon to a new one. Given two ends of a runway in decimal latitude & longitude Calculate the angle ...
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How can I change the pixel-size from degrees to meters? [duplicate]

I have a Martian DEM whose pixel size is specified in degrees instead of meters. I was trying to convert in Global Mapper but it didn't work. Now I am trying convert in QGIS with projections but it ...
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Converting UTM Dataset using QGIS

I have a dataset with coordinates in UTM. I want to covert these coordinates using QGIS to lat long. I've tried doing it multiple times now, and the end result converted coordinates are not coming out ...
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Does GDAL 3.x/PROJ 7.x do some kind of bounds checking when doing a gdalwarp operation?

This is more of a question about how GDAL 3.x and PROJ 7.x work more than a question about how to do something. I have been experimenting with GDAL 3.4.2 and have noticed some things that are ...
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Pixel size convert from degrees to meters of Martian DEM

I have a Martian DEM whose pixel size is specified in degrees instead of meters. I was trying to convert in Global Mapper but it didn't work. Now I am trying convert in QGIS with projections but it ...
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Map not showing up when set to GDA2020

When I open the quickmapservices/OSM (or Google) map it opens up on a EPSG:4326 (default), but since I am in Australia I need to use the GDA2020 projection. When I try to change the CRS to GDA2020, ...
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Error in projecting to Lambert Conformal Conic with One Standard Parallel in ArcMap

I am trying to project a polygon from UTM 46 N to Lambert Conformal Conic (1SP) in ArcMap using the following .proj file. PROJCS["Lambert_Conformal_Conic_1SP", GEOGCS["...
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Receiving Infinity in LineString using shapely and pyproj

I am try get linestring so I can measure the distance and time. Here in this linestring I am getting nan distance and time. data: path = [[29.87819, 121.54944999999998], [24.23111845, 119....
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ERROR 1: Too many points (441 out of 441) failed to transform when using gdalwarp to convert raster with compound projection

If I use gdalwarp to convert a simple ArcInfo ASCII grid with a compound projection (Geographic horizontal/meters vertical) to a GeoTIFF, I get an error message. Here's the input raster (asc_h84deg_vm....
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Unable to define a local projection with no units in a GeoTIFF file using GDAL

I am unable to define a local projection with no units for a GeoTIFF file using GDAL. Here is a sample of what I'm trying to do in Python: python >>> from osgeo import gdal >>> gd = ...
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OpenLayers Raster Reprojection to Mollweide cropped to oval

I'm trying to setup a Mollweide map, and only see a single projection of the world. Without the doubly projected areas in the corners of the map (see included images for clarification). Is there a ...
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Transformation of negative ordinate values from a .itiff file

I have multiple iTIFF files which were georeferenced by another person (CRS EPSG 31468, 3 degree GK Zone 4). The problem is that the ordinate (northing) comes with a negative sign while it should be ...
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gdalwarp - ERROR 2: gdalwarpoperation.cpp, 2401: cannot allocate 839889004 bytes on QGIS 3.16

I have two Int16 DEMs of 129600x64800 cells that cover the entire globe. The projection is WGS84 [EPSG:4326]. One contains only the elevation above sea level (no data cells above oceans), and the ...
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Polygon boundary from shapefiles not in latitude/longitude format

I just downloaded the shapefiles for the County boundaries in Minnesota from here. Now I am expecting the boundaries of the Polygons/MultiPolygons to consist of latitude and longitudes (according to ...
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Can't zoom to current layer from reprojecting geometry

We have developed GIS software based on QGIS and PostGIS. The geometry has been stored in the projection 29702 and all functions work wonders zoomToCurrentLayer Now we have imported geometric data ...
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Converting GPS co-ordinates to relative trajectories

I wish to convert GPS co-ordinates of an object (say, a car) to a relative trajectory. So suppose I'm travelling from A to B, at A I need to know the precise x-y-z co-ordinate from my current point (...
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Get layer's unit of measurement as string in PyQGIS

I'm writing a plugin where once a layer is selected in a combo box, it shows the layer's linear unit of measurement (meters, feet, etc.) in a QLineEdit box. def Function(self): currLyr = self....
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Custom projection in Centimetre (based on EPSG:28350)

I am trying to create a custom projection in centimetre based on EPSG:28350 (which is in metre) What needs to be done ? (it is not displaying correctly on QGIS) Tried: changing the Unit to "...
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