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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GEE: reduce image resolution to sum

What's the best way to accurately reduce the resolution of an image with a global extent by summing values in GEE and then export to drive? I am trying to export this global forest carbon potential ...
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GeoJSON from GIS Steiermark not convertible to Feature in ArcMap

I want to convert a GeoJSON (downloaded from GIS Steiermark) to a feature in ArcMap (the JSON I want to import is a polygon of the Riegersburg in Austria). This does not work. After checking the JSON ...
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Projecting LAS to local coordinates using lastools

Is it possible to project LAS files using Open source tools eg. lastools if using a less common coordinatesystem like local swedish espg: 3008 as destination and espg: 3006 as source? I see 3008 is ...
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Area calculation in PostGIS

I'm using PostgreSQL 14.1 with PostGIS 3.1. I've got a UTM 10x10 km grid malla, set in EPSG 25830, that covers all Spanish territories: I have run the following code (just to check that everything is ...
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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 ...
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Export image fails across the antimeridian in Google Earth Engine

I am trying to extract a multiband image that crosses the international date line. Earth Engine will export the image with the correct regional footprint, but any pixels that cross the antimeridian ...
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Choosing projection for mapping urban sprawl in Dubai

I am doing an urban sprawl classification on Dubai with imagery from Landsat 8 and Landsat 5, in 2015 and 2000 respectively. I was wondering if anyone had a suggestion on the best projection for this ...
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Transferring TIFF-File (EPSG:3035) located in Irael to Germany (EPSG:25832) using QGIS

I've loaded 4 TIFF-Raster-Files (EPSG:3035) in QGIS. Unfortunately those are located in other countries than they need to be. (Need to be in Germany..) The last time using TIFF-Files it worked out to ...
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Looking for exact geocoordinates and/or zip code of location of nearest hub identified with "Distance to nearest hub"

I used the "Distance to nearest hub (line to hub)" tool from the QGIS processing toolbox to determine the distance between over 8.000 polygon centroids and a line layer. That worked ...
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Creating rectangles from global point data of approximately consistent size in EPSG:3857 using QGIS

I have a point layer of global city locations taken from the Esri data here: https://www.arcgis.com/home/item.html?id=6996f03a1b364dbab4008d99380370ed I'm trying to create a rectangular bounding box ...
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Point data appears in middle of ocean but CRS is same across layers using QGIS

I have seen similar questions, have followed the advice, and still can't get it to work. I am trying to add point data to a map. I have set my map and data layer to the same CRS (WGS 84), but still my ...
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Reprojecting of raster using QGIS

The raster I am trying to reproject is found here https://psl.noaa.gov/data/gridded/data.gpcp.html, and it's the first one "Monthly Mean" (so you might try to do it yourselves). Problem is ...
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Converting ETRS89 coordinates to WGS84 in ArcMap [closed]

I do have a set of coordinates in ETRS89 which I did import in ArcMap. I then tried to convert the layer in a KMZ file without success. I think I should first convert the coordinates from ETRS89 to ...
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Converting coordinate from WRF to QGIS

I have a WRF domain called geo_em.d01.nc. I import this domain in QGIS and I see it in blue/red as you can see in the picture. How can I overlap this domain on my Esri background map? I understand ...
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Inaccurate results when converting coordinates from shapefile(dynamic projection system file) to EPSG:3857 using geotools

I have created a functionality where I get the geometry data from the shapefile and display it on the map and table structure. Here there is no restriction like that only some specific files can ...
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Why Google Maps no longer disable Mercator's projection on zoom out

Back in 2018, Google Maps start to get rid of mercator's projection in maximum zoom-out So we can see the size of island (moreover those in poles) in it's original sizes But today I try both in PC and ...
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Can't Project Lat/Long data to UTM

I have a set of points displayed at their latitude & longitude (derived from a CSV) in my active ArcMap document alongside a layer in a PCS (NAD '83 UTM Zone 17N). The lat/long points and the ...
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Is an SRID unique?

I wonder why the Authority and the SRID are often both used together to refer to a CRS, like in EPSG:4326. Isn't the SRID unique? Wikipedia says it is a "unique value", but also that spatial ...
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Projection of aerial image using QGIS

I am having a very hard time with a USGS Declass3 image (D3C1210-200272A025). I have already tried different projections, unfortunately without success. For sure, the problem is me, but I don't know ...
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In my project layers that were originally created by a Garmin 62s are projected 300 degrees/100m differently to the background mapping can you help?

In my project layers that were originally created by a Garmin 62s are projected 300 degrees offset and 100m distant to the background mapping can you help? When I had these display problems in 'A ...
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Is there a way to search for the viewport [(x,y)(x,y)] bounding a region in QGIS?

I am looking for a way where I can draw a bounding box for an entity through the screen coordinates that I have for that entity zoomed-in My objective is to: Draw a rectangular box using the zoomed-...
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Fixing distortion of a polygon layer probably caused by geoid undulation

I have the following problem: I would like to use a polygon layer marking trees with the Bing Maps aerial background imagery in QGIS (3.20.1-Odense). But it the positions of the polygons are slightly ...
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Connect corners of two rectangles via SVG line in Leaflet

Assuming I have two rectangles on a leaflet map with CRS.Simple, how can I use svgOverlay to draw a <line> that connect top left corner of the two rectangles? I'm having issue with spatial to ...
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33 views

Re-georeference an image that already has a spatial information

I have an aerial image that already has geo-spatial information (already georeferenced), but the original georeferenced location is very rough (not accurate). I wanted to create ground control points ...
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"GSS_International_1924" to "GCS_ETRS_1989"

I need to make a Geographic Coordinate System Transformation from "GSS_International_1924" to "GCS_ETRS_1989" but my ArcMap (Version 10.4) doesn't have any method for that. Can ...
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What CRS should I use to get the correct results for building a bussel boundary anywhere in the world?

I use a compass and a bussel to set the boundaries of a logging site. I have the coordinates of the starting point (WGS 84), the directional angles (in degrees) and the distances (in meters). What CRS ...
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26 views

"Scaling Down" a map

I'm doing some 3D modeling (non-analytical) using DEMs exported from QGIS by clipping by a mask layer then modeling in blender. The issue is that when I bring the rasters into blender using the "...
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Choosing map projection type for flight plan

There are two projection of maps that I saw online. UK CAA is a transverse projection map, while ICAO maps are conical. It seems that transverse map is easier for flight planing as straight lines are ...
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Map disappears after using Natural Earth projection in QGIS

I have a world map using the WGS 84 projection. I can reproject it as Miller, Robinson, or other projections, but when I use Natural Earth I or II, the map disappears. I'm applying this through ...
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Matching a raster projection to simple features spatial layer using R

I have two dataframes in R. One, df_points, has spatial information saved as points. The other, df_raster, is a raster file. I want to extract information from the raster to the points using: rasValue ...
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Printable Globe in QGIS

I'm trying to figure out how to use QGIS to print a map so that it can be wrapped around a sphere. I haven't found a projection that will display the map in a way similar to these. It sounds like ...
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How to use affine matrix to calculate row-column pair on a raster corresponding to a lat-long pair using NumPy?

I have a pair of latitude-longitude coordinates: lat, lon = 59.87115844471202, 10.656472637769236 I have a URL for a TIFF (this - it's public). I open it with rasterio (install: pip install rasterio),...
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GeoPandas does not write CRS in MapInfo Tab

I'm trying to convert a GeoTIFF file into a MapInfo format with Python and GeoPandas. To do that, I'm using the following code: mask = None with rasterio.Env(): with rasterio.open('geoTiff.tif') ...
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Accessing built in coordinate systems from ArcGIS Pro Python Toolbox tool

I am attempting to create a custom ArcGIS Pro Python Toolbox tool and some of the geoprocessing tools I use run slowly or not at all if the input DEM or environment is not projected first. I would ...
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43 views

Drawing a Custom Map Projection in D3 using Observable

I am trying to create a custom map projections in D3 using Observable, following the approach given in the d3-geo Docs. Essentially, you pass a function that takes in (lambda, phi) and returns [x, y]. ...
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Map layers disappear when new projection is defined

I am using ArcGIS Pro to define projections of 2 different layers (1 unknown, 1 WGS84) from a 3rd layer's correct projection (MGI Austria GK M31). I have also transformed the map's projection from ...
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Fit/scale 2d line in a given square

I have the below python code sample using the s2sphere library to create a bounding box around a rectangle in latitude-longitude space: for line in self.polylines: for latlng in line: bbox ...
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Importing CSV to QGIS but doesn't work properly

I'm trying to import CSV to QGIS but have a problem with coordinates. I added CSV (with longitude and latitude) via add delimited text-layer. Then I added OpenStreetMap and arrange the CRS But it ...
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27 views

Determining if a GeoTIFF's projection is in spherical or cartesian coordinates

I have received GeoTIFF that may be projected into a UTM or cartesian coordinate system or may be in a spherical (lat/lon) coordinate system. Is there a reliable way to automatically determine which ...
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Could this be any other geographic coordinate system than DMS?

I got given these coordinates for a point at Erdington Rugby Club, Birmingham. However, when I type them into Google Maps I get an error message and when I convert them from DMS or DDM to DD I end up ...
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Working with multiple layers in different CRSs using QGIS

I am trying to delineate a river basin located in Turkey. Turkey has divided in different zones as CRS. Half of my river basin locates in one zone (EPSG:2206), and the other half locates in a ...
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35 views

Changing origin in QGIS projection

My issue is that the QGIS print composer cannot print images that have coordinates passing beyond 180 degree in WGS84 (since it's going from -180 to 180 degree). The area of 180 degree is in the ...
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1answer
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Running proj/cs2cs command in Powershell

I'm reading a book where it says to run the following in the commandline, I think he used Linux. Therefore the command doesn't run in Windows Powershell cs2cs +proj=latlong +datum=NAD83 +to +proj=utm +...
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Coordinate Formatting, trying to convert to GPS

I have a .shp file with a large number of coordinates and I'm not sure how to transform to GPS coordinates. Ideally I'd like to use Python to convert , but have not seen this formatting before: [(...
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Extracting a Particular Masked NetCD4 Datapoint in Python

Suppose in Python, I have read in a netCDF4 file, as follows: import netCDF4 ds = netCDF4.Dataset('fire_weather_index_2018.nc') The aspects of the netCDF4 is as follows: <class 'netCDF4._netCDF4....
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QGIS 3.16.x .gsb grid file transformation

Is there a way to add .gsb grid files for transformations in QGIS 3.16.x and above. The instruction in: QGIS transformation defined in srs.db tbl_datum_transform table not available in Select Datum ...
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Saving CRS information using GeoPandas

How does GeoPandas save CRS information? globe = ccrs.Globe(ellipse='sphere', semimajor_axis=6370000, semiminor_axis=6370000) crs = ccrs.LambertConformal(globe=globe,central_longitude=111, ...
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Raster aligned but distorted in ArcGIS Pro

I have mapped a raster image (.tif) from a MODIS image collection in ArcGIS Pro and would like it to align with a polygon (red). However, the image seems to be slanted, which I assume is a projection ...
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Appropriate CRS for land-use change within EU?

I'm currently studying coordinate reference systems and using ArcGIS Pro 2.8 to find appropriate CRSs for different circumstances. To conduct an analysis of land-use change in the EU, would the best ...
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Proj Error when trying to save data in PostGIS database from geodjango

I want to store my raster image(tiff) in my PostGIS database I have a Django model ndvitime and I want to store my tiff image from earth engine to my database. The error arises when I want to save the ...

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