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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Synchronize Coordinate System in ArcGIS Pro
I have a map created in ArcGIS Pro ver 2, on the map the area of interest has coordinate system of GDA94 MGA Zone 56. On the Content Pane, the Map Grid is in MGA Zone 55 and the map content or map ...
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How to transform location data from Lamber (EPSG:31370) to GPS (EPSG:4326)?
Sorry if my way of writing is wrong, I'm a data scientist and I have little to none experience in GIS.
I would like to use an open dataset (from http://opendatastore.brussels/fr/ to be precise). It ...
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2answers
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Display coordinates for a specific projection in ArcMap?
Below are the available options I can find in the settings:
How can I pick a specific projection such as Web-Mercator (EPSG:3857)?
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Overlaying Landsat 8 (raster) and shapefile using ArcMap
I would like to know what I can do correct such problem, those images are not overlaying while they have the same projection system.
I used even the extent of the shapefile to change the one for the ...
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Geoserver does not wrap GRIB raster points to coordinates where x < 0
I am new to the GeoServer and want to use it for plotting wind barbs based on a GRIB file over land data.
The wind barbs are properly created but nothing is shown on coordinates x < 0.
The map ...
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1answer
37 views
Dealing with wrong projection [closed]
I am working with some rasters that have been produced with a wrong projection.
The Spatial Reference is saved as WGS84 (EPSG:4326) but the unit are clearly in meters and not degrees. I have tried ...
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1answer
24 views
Using Project Raster tool in ArcGIS Desktop
I'm using ArcGIS Desktop 10.7.
I have downloaded a raster file from this link.(the data is from ALOS PSAR)
when I opened the file all heights are ellipsoid, I have to convert the raster file to ...
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How to do a Lee’s Tetrahedral Conformal Projection of Antarctic/South pole on QGIS?
I want to do map of Antarctic using the Lee's Tetrahedral conformal map projection as the image below using QGIS version 3.4. Is it possible to make a custom CRS to do it? If yes, what's the ...
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1answer
58 views
Is the ESRI ArcGIS definition of California Albers projection using units of feet correct?
There is a map projection promulgated by the government of the state of California and recommended for use in certain state and municipal regulations. It is an Albers Equal Area projection with ...
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Google Earth Engine: Maintain area calculation accuracy while reducing resolution and exporting from
I am struggling to find a best practice for exporting data from Google Earth Engine at a reduced resolution for further analysis outside of GEE, while maintaining similar results analysis in the code ...
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Deciding when to use projected coordinate system (PCS) or geographic coordinate system (GCS)? [duplicate]
While I understand the technical differences between them both, I'd like an expert's breakdown of criteria to look out for that would determine when I should use a PCS or GCS.
I understand that a PCS ...
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Identifying of Vertical Datum from Metadata
I have been working with the DEM of South Carolina and I am not able to see from the metadata what is the vertical of the DEM.
How do I identify the vertical datum from the attached screenshot of ...
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1answer
17 views
Shapefile reprojection with “sf” R package doesn't work
I am using the sf R package to work with a shapefile (with a species distribution).
> sp #this is the shapefile
returns:
Simple feature collection with 1 feature and 1 field
geometry type: ...
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2answers
44 views
Projection problem
I have downloaded NCAR Community Climate System Model (CCSM) projections in shapefile format and want to look up maximum temperature. When I open it in QGIS having OSM as base map, it is shown as one ...
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24 views
Weird XY-resolution for map in ArcObjects
I have an MXD file with 240 feature-layers, all having the exact same spatial-reference and spatial resolution. I checked this using the following code:
var sortedLayers = allLayers.OfType<...
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How to convert ITRF to ITRF
ITRF 96 1998.0 epoch
X Y Z Vx(m/y) Vy(m/y) Vz(m/y)
4059623.25 2764405.93 4056720.43 -0.0079 -0.0007 0.0132
Transformation parameters from ITRF1996 to ...
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Distance Point x,i from nearest Point x,j report Point x,j ID in r
I have a sample of points villages x,i, and I want to know the distance between each village x,i and the nearest village x,j. The i, and j depicts two different samples. I am able to find the distance ...
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1answer
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Buffer (for 8 points) is set at 1 kilometer but is bigger than village polygons
Other details
This is in the Philippines and I'm using WGS_1984_UTM_Zone_51N
The buffer is 1km long so it must be the map layer that is wrong
I tried the Geodesic method instead of Planar but still ...
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1answer
40 views
Spatial reference data from all layers in MXD
I have a MXD with many group which has many layers. I have tried to get coordinate system data from all layers with the code from Iterating through layers in mxd and describing coordinate system. So ...
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0answers
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Mapping equirectangular square slice inside cubemap
I'm trying to map a square slice of an equirectangular image inside a cubemap with 6 faces, without distortion.
The point is that I'm dealing with huge array sizes if I try to project the whole ...
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1answer
23 views
Identify projection and set Bursa wolf params
i have a shapefile with .prj :
PROJCS["NAD_1927_UTM_Zone_17N",
GEOGCS["GCS_North_American_1927",
DATUM["D_North_American_1927",SPHEROID["Clarke_1866",6378206.4,294.9786982]],PRIMEM["Greenwich",0.0],
...
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Getting EPSG codes from Dotspatial.Projections
I have installed Dotspatial.Projections in my Visual Studio C# project. I have not found a way to get the EPSG codes.
Is there a way to do this using the Dotspatial.Projections library?
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Projecting the raster and vector to the same place [duplicate]
I have 3 groups of raster layers all in the same place, but my group with my vector layer are located above... I am working in QGIS.
They all have the same CRS WGS 84 / EPSG Greenland Polar ...
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Wrong location in ArcGIS Pro compared to calculation [closed]
I conducted map transformation between 2D geographic system, Mercator and Lambert Conformal Conic (LCC) projection by using basic transformation equation in Wiki.
In calculation, I put the earth ...
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41 views
Wrong CRS in map with QGIS [duplicate]
I have made a raster elevation map of Greenland, and have information of the region, cities and more as vectors. The information is not in the same place as my elevation map.
I have selected EPSG:...
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26 views
Projection of Ramthal, India
I'm working on a project in India and have problem with match shapefile to Google base map. I have tried different projections but couldn't find the right one.
What is the coordinate system to use in ...
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1answer
44 views
ArcGIS projected area greater than geodesic area
Question
Shouldn't the geodesic area always be greater than the planar area of a polygon?
Background
Tested in ArcMap and ArcGIS Pro, but several my polygons in a shapefile are having projected ...
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1answer
58 views
Longitude, latitude to polygon in ArcPy
I'm working in ArcGIS 10.4.1 and trying to write a script (in Python) for making a polygon shapefile from latitude/longitude.
txtFile=arcpy.GetParameterAsText(1)
shpOUTpolygon=arcpy....
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1answer
171 views
QGIS and Mapinfo reporting different projections for some files
When I open a tab file that's been generated in QGIS using EPSG 28355 (MGA 94, z55s) using QGIS 3.10 the projection is transformed to 5551
But when I open it in Mapinfo v17 it's correctly reported as ...
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24 views
Distorted H3 hexagons - even though projection is matching
Using H3-py's h3_to_geo_boundary a WKT linestring (via shapley polygons) can be generated.
When later visualizing the hexagons, why are they distorted? How can this be fixed?
To my best knowledge, ...
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30 views
Overlap of two images is switched
I try to find a way to create DEM model for two overlapping images from different sources. The upper image has transparency of 50% and as you can see they don't quite overlap correctly. The ...
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1answer
30 views
CAD file not overlay with ArcGIS?
CAD drawing has coordinates given but when this CAD file add to ArcGIS the coordinate showing is different. Why?
Actually the coordinates there shown is "Nahrawan 1967 utm 39". I use define ...
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1answer
82 views
Issues with units for Geometry by Expression in QGIS 3.10 - Super-sized buffers! [closed]
I am having issues performing a geometry by expression operation on a layer I have imported into QGIS. The issue is that the wedge buffers created by the expression I am using are far larger than they ...
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1answer
45 views
X/Y Coordinates to Longitude/Latitude, package for .net core app [closed]
I have a task to convert some incoming geo data to Longitude/Latitude. The data elements in the json are identified as xCoordinate and yCoordinate.
However, the data in my sample does not look like ...
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ERROR 000151:The operation was attempted on empty geometry
I have raster in Unknown_datum_based_upon_the_custom_spheroid_Sinusoidal projection system and I want to define the projection in Mercator (world) in ArcMap.
While using Define projection to WGS 1984 ...
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1answer
65 views
QGIS 3.10 projection error using BNG27700
When opening a workspace with CRS BNG 27700 I am now getting an error that the following transformation is missing - OSTN15_NTv2_OSGBtoETRS
If I use the next transformation in the list it puts my WMS ...
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1answer
36 views
Projecting and Measurements
I am looking to project all my data into EPSG::2959 (NAD83 CSRS UTM 18N) as I am working out of Ontario, Canada. Every time I start a project I set the project CRS to EPSG:2959, and then begin to add ...
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1answer
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GeoServer WMS Layers not overlaying on OSM base-Leaflet
I would like to understand why I cannot view or see the WMS layers loaded. Based on the investigation I did so far, I am assuming this has to do with base layers projections. My overlays are WGS84, ...
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Correctly mapping CSV with x y coordinates when converting to correct CRS doesn't work
I have a CSV file that I'd like to map using lat long coordinates. The file has a field containing four coordinate points (see image below), but the first two and second two are nearly identical, so I ...
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1answer
35 views
Setting projection parameters in Geopandas
I have a shapefile which I want to reproject to lambert conformal conic and set the projection parameters such as the following:
False_Easting, False_Northing, Central_Meridian, Standard_Parallel_1, ...
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1answer
50 views
QGIS: Creating custom CRS without using the GUI
What would be the appropriate way to create a custom CRS without using the GUI of QGIS on Windows?
I am trying to create a custom CRS but my GUI seems to be broken. I cannot use the normal way ("...
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Unknown proj4: how to create custom proj4 from wkt?
I have a shapefile with a .prj file I've never seen before. In fact, it seems that GDAL doesn't even know what it is (see below).
Therefore, when I read it into R with raster::shapefile() the CRS isn'...
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1answer
29 views
What are ui.Chart.image.doySeriesByRegion Arguments?
The function ui.Chart.image.doySeriesByRegion has been used on Google Earth Engine document, but it is not clear what are the arguments.
e.g. from the page:
var series3 = ui.Chart.image....
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1answer
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Use field calculator to calculate geometries with a different SRS than the dataset itself
I have a polygon dataset containing hundreds of rectangle map 'frames' that represent map extents across the CONUS. The dataset containing the frames is in EPSG:3857, but the frames themselves ...
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Wrong coordinate
I'm working on Sudan
I opened a Google map layer from the quick map services
I don't know how to set the project coordinate system to get to correct longitude and latitude
Should the project have a ...
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1answer
34 views
Online map source to check the geographic coordinates
I am looking for a map source to check the location of the coordinates I was given in latitude/longitude degrees. The coordinates and their corresponding locations are about 20 meters off with respect ...
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50 views
How to use gridfiles (*.gsb) in QGIS 3.10.0-2
It seems that the solution previously given does not work anymore:
How to use gridfiles (*.gsb) in QGIS
Does someone know how to add new transformations in using gridfiles *.gsb in QGIS 3.10?
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Recreate a Local Custom Coordinate System from Survey Data in GIS?
I have a .DWG file of a series of survey points that has no associated projection file with it. The surveying group I received the data from states that the system they use is a local coordinate ...
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Calculating elevation angles from RPCs in NITF files using GDAL
Given a NITF, the RPCs in the NITF, and the center pixel coordinates of the image, I am trying to determine the elevation angle (center ground point to satellite). From what I understand, this can be ...
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1answer
37 views
Why the “shape tools” won't work with a different CRS?
I just used a tool from the "Shape Tools" plugin but the results were nonsense. The CRS of the point layer and my project CRS were EPSG:4326 - WGS 84.
Here is an image of the result: The correct ...
