Geographic Information Systems

Questions tagged [coordinate-system]

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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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Global projection suitable for raster preserving equal area?

I have a global tif file in epsg:4326 and a shapefile of points distributed around the global. I want to retrieve the sum of the value of pixels around 10km of each point. One obvious thing to do is ...
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3D projected map: put locator from GPS coordinates

Hello I'm a newbie in maps and not so good (as I wish to be...) in math and geometrics stuffs. So: I have a 2d google map. I have to put a 2d projection of this map (not exactly this one but a ...
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24 views

Path to add NTv2 transformation to QGIS

Every time I start a new QGIS project, I have to add the BETA2007.gsb NTv2 Transformation. I would like to modify my QGIS settings in a way, that the NTv2 is automatically added to the project. When ...
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System.ApplicationException: 'EPSG PCS/GCS code 4326 not found in EPSG support files. Is this a valid EPSG coordinate system?'

I have setup a consol app in C# that uses the GDAL.CORE NuGet, it seems to work fine when converting most of the .shp files I have, however with one .shp file I am getting the error below: System....
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Conversion of height systems

If I have a vector dataset with XYZ data and convert it with QGIS from EPSG:31468 to EPSG:4979, for example, and the heights (z) are based on EPSG:31468. Will these values also be converted to the ...
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47 views

Altering layer's CRS to correct Layer Misalignment in QGIS

I've got a vector layer in my project which isn't aligned with the rest of the project (see attached JPEG). These are work files so I'm not sure when they were created or how they might have been ...
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39 views

Path to add often used CRS to “recently used crs”

When I start a completly new QGIS I need to manually add my often CRS to have them in the list of "recently used crs". I would like to add all of them in a folder somehow and than add the path to the ...
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PROJECTIONS USED [closed]

I have a data saved by a projection with following parameters: Ellipsoid Clarke 1880 Projection Lambert Conical Orthomorphic Latitude of Origin 31º ...
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1answer
55 views

Setting CRS to ESRI:102001 using GeoPandas

I've been passed some GeoJSON shape data that I've been told is in the CRS ESRI:102001, although that property has not been written into the GeoJSON file. I've been able to confirm that is the correct ...
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23 views

Create Fishnet issues with measurement distance

I am trying to create a regular soil sampling grid based upon digitised field extents. I had posted a previous question today relating to issues with coordinate systems and displaying the sample ...
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38 views

ArcGIS XY Coordinates [closed]

I am working with ArcMap to generate regular soil sampling points. These need to be displayed in TM75 Irish Grid. I have the projected coordinate system of the data frame set to TM75, appropriate ...
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1answer
31 views

Trying ST_Slope with SRTM rasters and a shapefile but the output raster has different SRID

I have two SRTM rasters https://dds.cr.usgs.gov/srtm/version2_1/SRTM1/Region_06/ (N40W074 and N40W075) with Datum "WGS_1984" I've united them to be able to work with one raster: CREATE TABLE rasters....
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Published Map Services in SRID 4326

I've been tasked with creating webservices of individual layers in Portal for ArcGIS. The data itself is stored in SQL Server in SRID 4326 (WGS84 unprojected). I'm wondering if it's a better idea to ...
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Manipulating Transformation parameters with PyQGIS

Is it possible to add a layer with a local coordinate system, transformed on the fly by a custom transformation entry from this local CRS -towgs84 and furthermore to manipulate the -towgs84 Parameters?...
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43 views

Mathematic Formula to convert GGM-32N to WGS-84 [closed]

I am looking for a formula to convert GGM-32N to WGS-84. I have a large list of coordinates in Excel which I would like to convert to this other format - therefore I would really like to know where to ...
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ERROR 000210: Cannot create output from gdb [duplicate]

I am trying to project features from a geodatabase and write into an enterprise geodatabase connection. I have permissions to create data and the name I am using also works. but I keep getting this ...
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1answer
56 views

What Projected or Geographic Coordinate System should I use to calculate km distances between various points on a large scale map? [closed]

I want to measure distances using the distance matrix tool on QGIS between the yellow dots and their closest blue dot. I want my output to be in KM and to be as accurate as possible. I don't want to ...
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61 views

Projecting features to Enterprise Geodatabase in Oracle gives ERROR 000210: Cannot create output

I am trying to project features from a geodatabase and write into an enterprise geodatabase connection. I have permissions to create data and the name I am using also works, but I keep getting error: ...
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41 views

After shapefile to GeoJSON conversion coordinates look wrong?

I have downloaded a shapefile of Iceland. Here is the source: http://www.arcgis.com/home/item.html?id=7a21f6f05b8d45848ed16298cbf96d59. I then converted the shapefile to geojson, using this tool: ...
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Moving geometry at same distance in different coordinate systems

I haven't been making tools in ArcPy for a while and stuck in one case. My goal is to create a serie of geometries in a center of current extent by running a script. I.e when I move ArcMap's extent ...
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42 views

Create prj4 file for NAD27 Mexico from prj file for import to QGIS

I would like to be able to add the NAD27 MEXICO projection to QGIS, MapInfo, etc. Global Mapper has this projection, and the prj file is: PROJCS["NAD_1927_UTM_Zone_13N",GEOGCS["...
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ETRS89 proyections in R and ArcGIS

I have a shape file in ETRS89 CRS created with ArcGIS 10.6, prj file says: GEOGCS["GCS_ETRS_1989",DATUM["D_ETRS_1989",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["...
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37 views

How to fit xyz file into map?

I am new to GIS and I want to fit a DEM given as an xyz file into an existing map. My problem is that when I open the xyz in qgis the tile is not at the correct position. Changing the CRS to the ...
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1answer
29 views

Set image SRC using GDAL [closed]

I have a TIFF image with no coordinate reference system and I need that image to be in EPSG 32631. Is there a way to do this using GDAL? Note: I am very new to Python
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Obtaining same resolution of pre and post UAV-Imagery In COSI-Corr?

I am currently trying to perform a correlation between a pre UAV derived image of a landslide with a post image to analyse displacement and direction. The images were processed through SfM ...
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Why the projection system and units are showing differ in ArcGIS and Autodesk AutoCAD Civil3D?

I have converted a bunch of shapefiles to .dwg through Model Builder in ArcGIS. The units and projection system is showing correctly in ArcGIS properties but in Autodesk Civil3D units are showing in ...
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What kind of coord-sys is this? - 955999.8911220022, 26397850.011872

How can I identify this coordinate system? When I load the .shp with QGIS I get the correct linear mapping. However when I try to convert to GeoJSON and plot with something like Leaflet.js I get ...
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OSM Map quality deteriorates when changing CRS - QGIS

I have a problem with basemaps for my drawings in QGIS. By basemaps I mean OpenStreetView, Google Maps etc. I'm aware that most of them (if not all) are natively set in EPSG:3857, and they look just ...
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1answer
37 views

Clipping a raster dataset with different projections

I have downloaded the Corine Land Cover map 2018 (raster 100m) from Copernicus Services, which covers the European Continent. As I only need to work within a certain area, I need to clip the original ...
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NodeJs library to convert ESRI point(x, y, wkid) to lat/lng

I use ArcGIS and get an array of ESRI points which I need to convert to lat/lng. I don't want to use the ArcGIS API, because it requires too many calls. Is there any library that can do the work for ...
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Gaussian Lat-Lon Grid to WGS84

I have some grib files from ECMWF ERA-Interim Reanalysis in which all the data are projected onto the N128 Gaussian grid (256 points of latitude x 512 points of longitude, https://www.ecmwf.int/en/...
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Convert heights from DHDN Gauß Krüger Zone 4 to UTM 32 ETRS 89 in pyproj

I am using pyproj. X/Y conversion is pretty straightforward through transformer = Transformer.from_crs(31468, 25832,always_xy=True) However, this does not transform the heights. From Vertical ...
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How to slice a reduced gaussian gridded grib with xarray?

I want: to get list of coordinates of points within the specified area (ideal would be geopandas from shapefile or something like this) I don't want to interpolate the grib, just extract points by ...
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1answer
59 views

WGS84 expressed in meters - default projection in ArcMap

I am trying to identify the correct coordinate system for some data, with x and y expressed as (for example, data located roughly in the UAE): 6,220,199; 2,742,099 I haven't come across these 7-...
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Finding distances associated with change in latitude and longitude at given location [duplicate]

I am writing a program that uses GPS lat and long coordinates and a time change to determine speed with the output in units of m/s (precise to 0.1 m if feasible, but 1 m is sufficient). When ...
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1answer
37 views

GeoServer PostGIS layer with mixed SRS possible?

I'd like to setup a layer in GeoServer based on a table in PostGIS DB. The geometry column in the table has no SRID set (Find_SRID for this table returns 0). Geometries inserted into the table don't ...
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63 views

Polygon poıints to simple GPS [closed]

I have nothing to do with codes and geography unfortunately and I need to find some places given in polygon points. It has been written something like POLYGON 1 To right Y 470333 to up X 4358838 How ...
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Preventing ogr2ogr from generating invalid geometries in transformation

I have the following GeoPackage: https://drive.google.com/open?id=1COcGcbZQIsW6NrzuD-K-Kijpvg4BYQ54 I have checked it with spatialite and it does not have invalid geometries. It has a ...
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ArcGIS Pro - map series - grid - dynamic coordinate system

I have a map series with different coordinate systems for each map. Map series spatial reference is based on EPSG Code which is an attribute in the index layer so the coordinate systems of the maps ...
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1answer
51 views

QGIS Grid Shift Files

QGIS is freezing on a transformation between EPSG:26912 and EPSG:3402. It appears to be looking for a grid shift file AB_CSRS.DAC which I can get from the federal government but I don't know how or ...
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83 views

What is the coordinate system?

I am basic user of GIS. I have a project in Rwanda and have received CAD information in a coordinate system I am unaware of. In addition this isn't the first time I have come across similar references ...
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30 views

Changing the Map Projection of a DEM File using gdalwarp?

I have downloaded the moons dem from: https://astrogeology.usgs.gov/search/details/Moon/LRO/LOLA/Lunar_LRO_LOLA_Global_LDEM_118m_Mar2014/cub I want to change the projection to create a new ...
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Shifting poles in QGIS

I'm looking for a method to shift the poles vertically in Mollweide projection using QGIS 3. I have come across this website and I want to do something similar. This is the default view of the ...
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39 views

Auto-generate Grid Reference for Point and Polygon features within existing Shapefile, QGIS

I have various point and polygon layers (shapefiles) which I use regularly in QGIS (3.6.3), and often need to work out their location as an 8 figure grid reference (British co-ordinates, EPSG-code ...
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1answer
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What is the meaning of “SI-D-48-Gauss_Kruger” projection used in an ESRI WKT string?

Recently I encountered the following WKT CRS definition from an ArcMap project: PROJCS["SI-D-48-Gauss_Kruger",GEOGCS["GCS_Bessel_1841",DATUM["D_Bessel_1841",SPHEROID["Bessel_1841",6377397.155,299....
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1answer
57 views

How to reproject raster image from WGS84/Pseudo-Mercator to ECEF to ENU in python? [closed]

I am new to GIS and I am writing a program that should work with a cartesian coordinate system, ENU. Therefore my plan is convert all point coordinates from WGS84/Pseudo-Mercator to ECEF and then to ...
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1answer
40 views

Draw a polygon from the mentioned data

I want to draw a polygon from the below JSON data from a GeoJSON file. However I am confused about the coordinates array since I believed they corresponded to a latitude and a longitude. But clearly ...
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1answer
29 views

List of available transformations between two coordinates system in epsg using geotools

How we can have the list of available transformation between two coordinate systems using geotools? e.g. the list provided of epsg.io between EPSG:32066 and EPSG:4326 https://epsg.io/32066 Java ...
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1answer
47 views

Keep raster data in original projection and just display it using a new transformation (at the poles) in R vs ArcMap

Desired output: Raster with original characteristics but in transformed projection using R (I.e. See second paragraph here.). NB, I need to do this for 100s of different rasters. You can achieve this ...
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1answer
44 views

Choosing CRS for Chicago, Illinois

I have data for Chicago, Illinois, that is in WGS84 CRS. I need to convert it to a metric projected CRS, and I've found several possible options: EPSG 3528 EPSG 6454 EPSG 2790 EPSG 26971 Among these,...

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