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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how to deal with .LAZ files that have wrong coordinate system in header? [closed]

I have been given a bunch of .LAZ files that had the wrong coordinate system applied in their header, so the coverage grid shows up skewed and I am trying to correct the issue to work with the files ...
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How to convert lat/lon to x/y in Lambert conformal conic projection using Python

I am trying to convert some lat and lon to x and y with projection Lambert conformal conic. I am trying the Python package pyproj for that but getting the wrong values. The issue is that the ...
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Map distortion and the difference between the Orthographic and Stereographic Azimuthal projection

I am new to the topic of maps and distortions and am a bit confused about the effects of conform and no-conform maps. Taking as an example the Azimuthal projection: I have read that with the ...
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How to compute weighted centroid of lat+lon points taking into account spheroid

I have a bunch of points (lat+lon coordinates). Each one has a weight. I would like to get a weighted centroid of the points, taking into account the spheroid (as my points are scattered across the ...
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GDAL coordinate transformation not aligning with QGIS coordinate transformation

I have a raster being changed from EPSG:27700 to EPSG:3857 coordinate reference system. Within the QGIS application, I have found this coordinate transformation to fit the best I've tried to ...
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Creating custom initial projection in GMT/GDAL

I have a number of images which I need to project into the standard IAU 2000 lunar coordinate system. Each is defined in terms of an oblique cylindrical projection, and I am given the rotation pole/...
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Curved labels along parallels in different CRS / map projection (QGIS 3.4)

I'm trying to make curved labels based on map projection. As in these examples, I would like labels for point layers to follow parallels. Is that possible in QGIS 3? Or a labeling style like this: ...
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Line has been split, total line is different from unsplit line using ArcGIS Pro

In ArcGIS Pro, I've done a intersect on a line based on an area boundary. When I compare the length of the intersected lines, it should equal the length of the original line. However there is a slight ...
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R SQL importing Polygon errors System.FormatException: 24119

Any advice here from you all. I am converting a .kml file in R and uploading the data to SQL. I am pulling data from here: https://www2.census.gov/geo/tiger/GENZ2021/kml/cb_2021_08_tract_500k.zip ...
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Error: Projection: The CRS of a map projection could not be parsed. (Error code: 3)

I transferred the image I exported from Google Earth Engine to QGIS. I am getting projection error in my work. Anyone have an idea about this? When I want to export in WGS 84 EPSG:7030 I get the error ...
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Sentinel L2 WV - Envisat WVS product are defocused?

I would like to apply the methodology from this paper : Measurement of 2-D Sea Surface Elevation Fields Using Complex Synthetic Aperture Radar Data. However, looks like one important step is that the ...
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NetCDF file and shapefile in wildly different locations and of disproportionate sizes when projected with the same CRS on QGIS?

I am trying to map global greenhouse gas emissions data from the European Commission's Emissions Database for Global Atmospheric Research (EDGAR) and Northern Arizona University's Fossil Fuel Data ...
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Maps not overlapping

I need to Georeference a map which is given in .jpg format. I reference the map using QGIS Georeferencer. The Georeference was successful and coordinate system was saved to WGS 84/UTM Zone 56s EPSG:...
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Application of A* using openrouteservice

I'm new to using GIS and would like to know is it possible to implement an A* algorithm using openrouteservice? I need to find a route between the source and destination that encounters a large number ...
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Converting projection in lat lon to pixel x y

I'm looking at a map at https://stephanwagner.me/create-world-map-charts-with-svgmap#svgMapDemoGDP I think it is a Robinson projection but am not sure given that Antarctica is missing. Is there a ...
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ETOPO1 ice sheet GeoTIFF not reprojecting (or appearing for that matter) in Albers conic equal area north Asia [closed]

I am new to and using QGIS for my own amusement. I downloaded the grid ice sheet GeoTIFF from ETOPO1 and want to reproject the file to Albers north Asia conic. But every time I do that the image ...
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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 ...
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Eliminate mismatch between building images and their shape file annotations

I have little experience with geospatial data processing. I have a satellite image of an area (a geotiff file) and building footprints (building annotations) for this area (a shape file). When I open ...
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Warning inconsistency extent - extent is incorrect

I have a file I got from someone made digitized in QGIS it shows the coordinate system as GCS WGS84 but the extent values are bizarre. When I open in ArcMap it says warning wrong or inconsistency ...
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Project Mercator coordinates at a specified zoom level in Mapbox GL JS

I am struggling a bit moving from Leaflet to Mapbox. I have geojson with coordinates like [68100095, 100779149], which I am told are Mercator x/y coordinates at a zoom level of 20. This is how the ...
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What is a source of Proj projections definitions?

I'm trying to create my own implementation of most popular projections (for reasons unrelated with GIS). But I want my implementation to be as compatible with Proj as possible (because it is an ...
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QGIS - Does the Coordinate reference systems of two vectors/shapefiles matter if they are the same or not? [closed]

I have two polygon shapefiles. It says in the information properties that the CRS IS EPSG 4326 and the other one says the CRS is a custom one (I put this custom one). Since these are shapefiles, ...
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Upon ArcMap data layer Reprojection, data is not lining up [duplicate]

My data will not line up after reprojecting into the coordinate system I am trying to match with another. I have an existing layer called AA_Cities and a newly downloaded shapefile called ...
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Output raster of rasterio.mask doesn't match CRS of input [closed]

I'm trying to mask a raster with population data with my area of interest. I reprojected the original population raster according to the AOI's crs, but after masking and writing the new file, the crs ...
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Extent of a proj4 string

I have a custom proj4 string in which my data is represented in Cartesian local coordinates. The example proj4 is below. +proj=tmerc +lat_0=44.155877943 +lon_0=141.655514872997 +k_0=1.000004976 +a=...
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Using a grid reference to convert to lat/lng

I have a set of coordinates of the form 35KNLXXXXXX where the Xs are numbers e.g. 35KNL192274 and are in relation to Binga SE-35-7 Edition 3 and of the scale 1: 250 000. I found the relevant map here ...
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CRS to use for computing distances between points on global scale with GeoPandas

I have a global coastline grid made up of polygons (hexagons) and I am trying to aggregate global data onto these hexagons. For example, I am trying to compute the distance of each hexagon to the ...
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gdal2tiles.py Differs from Original Raster

When comparing in QGIS the output of gdal2tiles.py to the raster from which the tiles were generated there is a clear difference. In this image Pink is the gdal2tiles.py output, green is the original ...
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3 votes
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ipyleaflet area of drawn polygon

I am trying to get the area of a drawn polygon in ipyleaflet with geopandas...but kind of cant get a propper result. from ipyleaflet import Map, basemaps, DrawControl, SearchControl m = Map(basemap=...
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EPSG:3857 to UTM?

I am trying to convert coordinates from EPSG:3857 Spherical Mercator to UTM local projection. The problem is that for my use case I cannot use any web interface or library, I should implement the ...
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QGIS: Set CRS for vector tile

All vector tile sources that are supplied in EPSG:3857 WGS/84 are projected fitting to other layers, even when converted to other CRS using on the fly projection. There is a vector tile source that is ...
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Setting the right projection for a georeferenced PNG image

I have been trying to georeference an image I downloaded from Google API. Here is how I approached it after many unsuccessful attempts: I calculated the coordinates of the corners using this code. I ...
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Move layers from a qgis project to an other

I was working on a non georeferenced qgis project and when I tried to drag and drop the layers from this project to a new georeferenced raster layer the other layers didn't show up. Some notes: The ...
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Ordering/arrangeing shape polygons by size, without a CRS

I'd like to use QGIS to order/arrange polygons (or ideally, clipped rasters) from a map by area, to create an infographic diagram like this one I found online (sourced from https://www....
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Using layers with different CRS in Intersection tool of QGIS

I've always thought that to intersect two layers, they needed to have the same CRS. Today, I tested the Intersection tool to intersect layers with different CRSs, and I was surprised to see that it ...
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1 answer
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"ERROR: Unable to initialize coordinate transformation" when reprojecting from one CRS to another CRS in a different mapset

I am trying to reproject a global raster (this: https://sedac.ciesin.columbia.edu/data/set/wildareas-v3-2009-human-footprint/data-download, I named it HFI) from Mollweide (its projection) to LAEA3035 ...
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Calculate length using GeoPandas

I have a shape file "Line1.shp". It has only one feature. When I calculate the length in ArcGIS Pro using "Calculate Geometry" and selecting units as "Meters" and ...
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Change map projection in Leaflet

I'm using leaflet in my current project. As a map sourse Leaflet consumes json-file with coordinates in WGS84 EPSG 4326. <l-map ref="myMap" :zoom="zoom" :...
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Making Rasterio read CRS directly from PRJ file when CRS missing from metadata but present in PRJ file

I'm trying to read a Raster file (GeoTiff) using Rasterio/Python. The file has fully populated metadata, but no CRS projection. This is present in a separate PRJ file (other files included are .aux ...
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Display raster from geoserver through openlayers using "xyz"

I'm trying to display some raster images hosted from geoserver using Openlayers. Following this example from openlayers website, it seems I could achieve it by consume the data through "xyz" ...
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Define raster resolution in UTM or Lambert Azimuth Equal Area projection

I want to create a raster grid in Lambert Azimuth Equal Area projection. I need to work within the raster and sp packages, and I need to work in LAEA projection. However, when creating my raster, my ...
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1 vote
1 answer
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Converting X/Y coordinates using pyproj giving incorrect results

I have two CSV files which I have to merge and the only thing common I found was one of them has coordinates of six points for polygon. and the second file has x, y coordinates which is the only ...
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Assigning local CRS to space telescope imagery? [closed]

Since the new images became available from the James Webb space telescope (https://webbtelescope.org/resource-gallery/images), I want to test some of my favorite classification, segmentation, and ...
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Shapefile with different NAD83 zones

I have a shapefile with zone 17 and 18 as content, and zone 18 as coordinate system. When using coordinates of zone 17 there is an error. What to do?
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Google My Maps - adding a layer that contains coordinates

I'm using Google My Maps for a project that requires users to find a particular site and then send me the coordinates of that site. However, a "published" Google My Maps doesn't provide the ...
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Orthographic Projection of Mars (MOLA) in QGIS - Visually correct results, wrong coordinates

I am trying to reproject the coloured shaded relief map of Mars (MOLA). After many tries, I got an orthographic projection of the scene centred on the pole, however, the coordinates are wrong. I ...
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Is there any way to get the information in XML, or GeoJSON or in any text format for this ArcGIS from URL?

I have a URL like this https://arcgisserver.lund.se/arcgis/rest/directories/arcgisoutput/extern/Extern_Stadsplanering_MapServer/_ags_mapd3b02fb986704186a28a270abd0baff1.png Source Page https://...
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Blank tiles near borders of shapefile

I've generated a tileindex (.shp file) of some COG files using gdaltindex. However, when loading the shapefile through MapServer in Leaflet, some of the tiles seem to go blank partially when zooming ...
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Qgis2threejs Overlay/Canvas Misalignment Error

I am using Qgis2threejs to create 3D models using a DEM with vector data and raster imagery overlain. However, my raster imagery data does not project correctly onto the 3D model. I have tried putting ...
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Reproject GLS data to match with satellite derived data?

I am having problems importing GLS data into QGIS. When importing the data it is shifted to the right and has cut the data at the wrong line of latitude as per the photo. What can I do to remedy this?
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