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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35 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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33 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
96 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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78 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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35 views

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
130 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
41 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
53 views

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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42 views

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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44 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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59 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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75 views

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
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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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55 views

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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44 views

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
45 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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70 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
39 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 ...
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2answers
234 views

Creating custom CRS in QGIS

I am trying to define a custom CRS in QGIS 3.4 to work on some data in Central Asia. I want to use the Albers Equal Area Conic but change the parameters so that the transformation works best for my ...
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43 views

Extract value of a latitude/longitude for a NETCDF4 file containing vertex_longitude and vertex_latitude values for OCO-2 product [closed]

I had downloaded a file from https://co2.jpl.nasa.gov/build/?dataset=OCO2L2Stdv8&product=FULL#download The data is freely available and you can download it without registering It is a Netcdf4 ...
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24 views

QGIS Graticule at Print Layout starting at from 0

I would like to add a graticule with coordinates to my map. However, when I add a new grid and modify it the graticule appears but it always starts at 0 and not from its real value. How could I fix ...
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1answer
35 views

QGIS crashes when changing projection to South Pole Lambert Azimuthal Equal Area

I can change the projection to every projection I have tried successfully except for South Pole Lambert Azimuthal Equal Area. When I click apply the loading bar appears in the bottom of QGIS and says '...
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63 views

Create a grid in R, change in cell size displaces position of grid

I'm writing R script which will allow users to overlay a grid on their data in a new projection with the option of defining the size of the grid cell. This seems to work fine, however, when I plot two ...
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43 views

Transposing coordinates from PDF map onto satellite image

I have a map in a PDF file with boundaries that I want to plot onto a satellite image. I have made a screenshot, saved it as tiff and imported it as a Rraster object. Using click I have outlined the ...
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1answer
90 views

How to create an hexagonal grid of regular hexagons of definite area anywhere on the globe, using shapely?

I have a geojson file describing a polygon. I want to create an hexagonal grid on top of this polygon, with regular hexagons of area 90000 square meters. Right now, I can either guarantee the area, ...
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46 views

What projection to use to create aligned GB and Ireland OS Grid map

I would like to create a map like the following: It displays the 100km grid square systems used by both UK and Ireland. I have created the 100km grid squares using the TomBio tools plug in, however,...
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13 views

Deciphering bounding box of private API

I'm using an undocumented private API to grab some tiles. But it's using a strange coordinate system. The area covered is -77.318467, 44.148949, -77.297040, 44.133303 however the APIs bounding box ...
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29 views

Reprojection problem with Rasterio

I have already processed so far NDSI map by using Rrasterio, NumPy, os and matplotlib.pyplot for plotting the data. Now, I would like to eliminate permanent ice from NDSI map. I am facing one major ...
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2answers
29 views

Re-projection issues with Azimuthal Equidistant

When reprojecting country-border polygons from longlat: +proj=longlat +datum=WGS84 +no_defs to Azimuthal Equidistant: +proj=aeqd +lat_0=26 +lon_0=126 +x_0=0 +y_0=0 +a=6371000 +b=6371000 +units=m +...
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Basemap misalignment between Digitalglobe Maps API to Maxar EarthWatch basemap products

The resulting of features created for Project2018 using DigitalGlobe Maps API (now decomissioned) and Project2019 using Maxar EarthWatch basemap (replacement product) are not aligned. Is anyone ...
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1answer
41 views

TRMM 3B42RT product has no Coordinate Reference System?

When I download TRMM precipitation product 3B42RT.2016010100.7.7day and when opening it in QGIS the raster has no CRS and is seen in another place with a smaller resolution, I already tried ...
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2answers
52 views

Switch between ArcGIS and R changes my shapefile projection?

Not the best practice, but somethimes I need to change between ArcGIS 10.6 and R (version 3.6.1) to process my shapefiles. For example, I want to read my shapefile in R -> process it -> export it back ...
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50 views

Attempted to load an infinite number of tiles while using proj4leaflet and EPSG:32614 [closed]

I get error "Attempted to load an infinite number of tiles" while using proj4leaflet and EPSG:32614. crs = new L.Proj.CRS('EPSG:32614', '+proj=utm +zone=14N +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +...
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18 views

Overlap .nc file layer and shapefile layer

Hello all. I have an .nc file with grid data of dimensions 90,111. I want to overlap this dataset layer with a shapefile I have. I've converted the .nc file to a raster dataset and saved it as a tiff ...
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37 views

Can't get two shapefiles to plot together

I have two shapefiles that I am trying to plot in R together with no luck. I believe both shapefiles have the same projection based on the following information: Shapefile 1 - sams proj4string(sams)...
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37 views

Changing bad coordinates of GeoJSON shape to coordinates of another GeoJSON shape?

I have two GeoJSON file one with true coordinates, one with wrong coordinates with labels. They both refer to the same geographical object: districts in Georgia. I would like to convert the ...
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47 views

Making a buffer - degrees instead of meters [duplicate]

I just started working with GIS very recently. I'm trying to create a buffer of 200m around the points of the layer "vlaamse venen naamloze laag". But in the distance box, the program will only allow ...
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25 views

TIFF file missing spatial reference

I am using ArcGIS 10.6. I have a .tif file and I created a mosaic dataset and added this .tif file to it. Then I published it to Portal and everything was working fine. Then suddenly I started ...
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1answer
40 views

Why will arcpy.Project_management not create output?

I have 2 feature datasets in a .gdb (CNMS_Inventory and CNMS_Inventory_Albers). I set the dataset for CNMS_Inventory to 4269(NAD83) when I created it and it contains a feature class called ...
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1answer
48 views

Formula to calculate the next coordinate given a coordinate, distance,direction and probably speed

I have this coordinates 52.3545362,4.7638767 which I got from a Google Maps search of Amsterdam. URL https://www.google.com/maps/place/Amsterdam,+Netherlands/@52.3545362,4.7638767,11z/data=!3m1!4b1!...
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Shift central point of world map

Update: I managed to find a way to add a custom projection. However, the next problem has presented itself. I end up with a line being drawn across my map. Any advice on how to fix this?
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1answer
55 views

Aligning two maps with different projections in QGIS

I am trying to add historic borders to a modern blank world map. The files I have are all bitmap format and the historic borders are in separate regional maps (Africa, India, North America, Western ...
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36 views

Strange buffer shape when using planar buffer method

I'm doing a very simple operation involving clipping some streams from the National Hydrography Dataset in ArcGIS Desktop 10.3.1, reprojecting them from "GCS North American 1983" into "USA Contiguous ...
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In WMS service Geographic Coordinate System changed from NAD 1983 to WGS 1984

In our project MXD it's Geographic Coordinate System is "NAD1983" and Projected Coordinate system is "NAD_1983_BLM_Zone_11N", and I published Map and WMS service from this MXD, while publishing in ...
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1answer
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Pyproj projection 0.5 meter differnce from official results (IGD05/12,IG05/12) Israel Grid

I'm trying to use those parameters and I receive a difference of ~0.5m ALON and BSHM APN Points: coords = [ (dms2rad([31,42,28.5694]), dms2rad([34,36,23.92196]), 55.671), (dms2rad([32,46,44....
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How to find the coordinates (longitude, latitude) of a point in an aerial image? [closed]

I will be receiving drone images from an associate. It'll have longitudes/latitudes values from the corners of the image. I don't have access to his image processing S/W. It'll be in a relatively ...
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1answer
37 views

*.h5 Projection Parameters

I have a file named 'VNP13A1...h5' and I'm trying to georeference it in Python 3. I know how to read and extract data from this file and what I'm trying to do is automating this process for other ...