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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12 views

Cost Path tool fails saying “No Spatial Reference Exists”? All inputs are set to UTM 19N

I've already run the least cost path tool several times successfully. But, now that I changed the destination input to a different shapefile (PCS: UTM 19N just like all the others) it keeps failing ...
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Disparity of Earth cordinate projection Pseudo Mercator: EPSG 3857 in softwares ERDAS Imagine, ArcGIS, Geomedia and QGIS

The Pseudo-Mercator projection is a cylindrical projection system, useful for small-scale mapping representation. It was also represented by projection Web Mercator (Auxiliary Sphere) in different GIS ...
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37 views

How convert lat lon to another format? [closed]

Input data 47,4792010000765 42,989255000241 Output data 5285360.478599999 5310336.491400003 But i receive 3643985.9453798616 5539030.168736918 Whats incorrect in my code? import pyproj Lat = 47....
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22 views

How add correct coordinates to map in WGS 1984

My map format is WGS 1984. How insert data in wgs1984? At now its inserted incorrect coordinates xy = (47.550976, 42.963041) array = arcpy.Array() with arcpy.da.InsertCursor(schetchiki_path,['SHAPE@...
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19 views

Reprojecting script runs without errors in Spyder and ArcGIS Pro script tool but desired outcome is not reached

I am new to Python and am attempting to write a script where the desired spatial reference is found on my Counties.shp and the other feature classes are in other projected coordinate systems. The code ...
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26 views

GeoDjango geometry transform method is swapping x with y

I need to convert a geometry from srid 4326 to srid 3857: myPoint4326 = Point(x=-73,y=40, srid=4326) myPoint3857 = myPoint4326.transform(3857,clone=True) print(myPoint4326.wkt) print(myPoint3857.wkt) ...
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18 views

PyQGIS Create Point Layer From Table Coordinate System reference

I am trying to run "Create Point Layer From Table" processing tool. processing.run("native:createpointslayerfromtable", {'INPUT':'C:\\Users\\ABC\\pointfile.xlsx|...
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How to define the CRS of r.watershed and other GRASS functions when used in QGis?

Am delineating some catchments from a DEM terrain file using the GRASS functions r.watershed and r.water.outlet, however, i prefer to do it in QGis as it saves me time by not having to create a GRASS ...
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32 views

“Unknown datum” opening GRS80 Transverse Mercator in R

I am working with a shapefile (available here as a 15MB ZIP) with a projection defined as follows: GEOGCS["GCS_GRS_1980",DATUM["D_GRS_1980",SPHEROID["GRS_1980",6378137,...
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16 views

Creation of a polynomial function from old and new coordinate system pairs

I have data points in the old Roussilhe Stereographic coordinate system of Suriname (u,v), I have the same data points also in WGS84 UTM21N coordinates (x,y). I want to create a polynomial ...
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57 views

Trying to write a script that re-projects vector datasets in a folder

I am new to Python and am struggling with my code specifically with my loops.The project is supposed to abide by these rules: Must re-project shapefile vector datasets in the folder to match the ...
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25 views

How to georeference a BC Land Survey in ArcGIS Pro

I am relatively new to ArcGIS Pro. I have a map with land parcels (from ParcelMap BC; let's call it the PMBC layer). I have added a DWG file from a BC land surveyor (let call it the BCLS layer). The ...
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37 views

Calculating height above ground from ellipsoidal height and GDEMs

I'm very much a novice on GIS/geospatial related work. Recently I've been trying to find the height of a 3D coordinate (latitude, longitude, altitude) above the surface of the earth. I have measured a ...
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26 views

Finding the UTM coordinates for the start point and the end point of features in a line feature class with ArcPy, 2.7.8, ArcMap 10.8

I have been trying to create a script to find the start and end UTM coordinates for a line feature class in ArcMap 10.8. The server we are using has Python 2 so my script is in Python 2. I have been ...
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Can Trimble Business Center export projection information in any useable GIS format?

In Trimble Business Center, a surveyor can create a local ground system for a given location easily. For example, when building a bridge, the surveyor can create a ground system based on State Plane ...
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35 views

KMZ file in wrong coordinate system and won't transfer into correct one

I'm using a pyroclastic flow simulation model (Titan2D Mass Flow Simulation GUI) that uses UTM WGS 1984 and from what I can tell, the coordinates that I'm inputting are all correct. When I view the ...
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56 views

Cannot find the correct projection

I'm working with some raster data I downloaded. The problem is I can't manage to find the correct projection for this file. It should work with WGS84 (as shown in the image below) but it's displaced ...
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input projection is NA error

I'm trying to reproject a .tiff file from a wgs84 projection to a south america albers equal area conic projection. To do this I have created the following script (it will later be modified for a high ...
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(Auto)Convertion from point-coordinates (postgres) [duplicate]

When loading data from my postgres-db (where I can only read from, so not my own db) the field with the point-coordinates like .. 'POINT(390002.1610814564 6001433.406049595)' .. are getting (auto)...
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84 views

Convert x,y coordinates into CRS:84 for GeoJSON

I have several .tif (GeoTIFF) images each with different CRS and spatial resolutions. For each image (.tif file), I have the CRS, 4 extents, data type and pixel size. I then use these images in an ...
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76 views

Shift country polygons to other world-regions in QGIS, adapting it's size corresponding to the true area

On the website The true size of ..., you can shift the shape of countries to other world regions to see the true size (area) on a distorted map (mercator projection). Dragging Greenland over Africa ...
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10 views

How to georeference HDF5 file with missing or wrong metadata

I'm trying to access data in a HDF5 file. I can access the data itself but the metadata, in particular the information to georeference the information, is still a problem. I had partial success in ...
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28 views

How to get latitude and longitude coordinates from district names in India?

I have created a CSV file with the census data for India. One of the columns is District name in the CSV. However, since I do not have lat and long in the CSV file, QGIS is unable to accept and add it ...
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Should I use NAD83 datum for surveys in North America if features are traced over Google Earth (WGS84)

I know NAD83 is more accurate in North America, but the features we inspect are just traced over google earth imagery which from my understanding is referenced using WGS84. Would it be better to keep ...
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55 views

Georeferencing a historic map to a local custom coordinate system

I want to georeference a map (TIFF) from 1965 using the grid crosses as ground control points. The map is in the local coordinate system which I calculated and wrote a custom coordinate system for. ...
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Getting proj string from cartopy CRS

I'm trying to get proj strings from cartopy crs', such as cartopy.crs.PlateCarree(). I can manually infer the proj string from the init() function in the source code but I need to query it, so I can ...
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37 views

Reprojecting Mars image from SimpleCylindrical to Equirectangular projection

The task is to re-project the image of Mars from one projection to another. In particular I want to re-project an image from SimpleCylindrical Mars projection - Projected to Equirectangular MARS ...
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106 views

Converting table UTM coordinates to decimal lat-long in Attribute table using expression

I would like to formulate an equation in the attribute table calculator tool to calculate the decimal latitude and longitude values from the existing UTM NAD3 coordinates in the table. The UTM NAD83 ...
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24 views

Use OTB on different celestial body (Mars)

For a project I am trying to use machine learning on maps of Mars using OTB, but I get critical errors and I'm quite sure they have nothing to do with OTB (but you never know). Objective: Being able ...
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Using polar projections QGIS issue

I am wanting to project a basemap focusing on the Arctic. Currently I am using QuickMap Services / XYZ tiles as the basemap and projecting the map to EPSG:3995 WGS 84 / Arctic Polar Stereographic. ...
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Convert MODIS_Sinusoidal into WGS84 in ArcGIS Pro

This is how the. tiff looks when I add it into ArcGIS Pro I'm new to ArcGIS pro and coordinate system. I export the MODIS land cover data from Google Earth Engine, but when I import this into ArcGIS ...
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35 views

Georeferencer negative impact on image resolution

I added CRS to my .tif image(it weights 120gb and doesnt have CRS) using QGIS gdal method (Georeferencer). And the result .tif image with CRS (EPSG:4326) weights 70gb and image resolution is much ...
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20 views

How to project WGS84 coordinates to calculate the distance in meters [duplicate]

I have geo coordinates from Google Maps which are WGS84 in decimal degrees for India. I want to calculate the distance between them in meters. Which projection should I use? I use ArcMap 10.4.1.
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28 views

How can I set the peprojection of tif file to a certain map extent and pixel size from a different file?

I have a tif file with the projection USER: 100032. And I want to reproject it to EPSG: 4326. I have previously done it in a similar way for a similar projection and used gdal.Warp(). The physical ...
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37 views

Choosing coordinate system for reprojection of Nigerian data

I am dealing with Nigerian data and the data I have needs to be reprojected. There are 3 options for that: Nigeria middle, Nigeria west and Nigeria east. How do I determine the best option for my ...
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45 views

Showing lat long instead of numbered index on spatial data map

I am trying to project meteorological data from a netcdf4 file with its latitude and longitude information and I am not getting how to show lat-long information on the x and y-axis, in the image ...
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Oblique projection in QGIS

I wanted to make a map of the world that shows all continents at once, Antarctica included, with as little distortion as possible on the continents and for that purpose, I noticed 2 opposite points on ...
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20 views

How to improve precision of geographic coordinates using ogr2ogr to translate from shapefile to KML?

I made a shapefile in QGIS (ver 3.16) project with EPSG:4326. The shapefile is for a simple polygon and I want to display the polygon on Google Earth so I need to convert it to KML format. The default ...
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40 views

QGIS custom coordinate reference system of a local site

I am creating a geo database for an archaeological excavation. We want to put data from a local system and from UTM35 in the same QGIS-project. I have Ground Control Points in both systems. I setted ...
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29 views

How to create a shapefile of circles from geo coordinates and radius in meters and project it correctly?

I have latitude and longitude coordinates for India from Google Maps in degrees and radius in meters as displayed below: I want to create a shapefile of circles with given radius. I know about ...
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1answer
44 views

Drawing Arc on a map using multiple points: getting proper direction and intermediate point coordinates

I am using the following Swift code to create arcs using Apple's MKMap framework. This should give an idea how things are being calculated... import Foundation import UIKit import MapKit class ...
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17 views

set CRS for numpy array that has no geographical data using rasterio and bbox data [duplicate]

I have 1 dimension numpy array that has no geographical information. The numpy array was originally satellite image that I have manipulated in order to get this 1 dimension arrray. I have the crs and ...
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98 views

Set CRS to numpy array with no geographical data using rasterio

I have 1 dimension numpy array that has no geographical information. The numpy array was originally satellite image that I have manipulated in order to get this 1 dimension array. I have the crs and ...
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1answer
66 views

Transform a lat/lon coordinate to x/y pixel on a Google Earth screen

For a given Google Earth URL (for example https://earth.google.com/web/@33.83405747,-117.89835255,51.77456494a,140.84823168d,35y,0h,0t,0r) I want to find the lat/lng coordinates of the corners of the ...
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30 views

How to convert Australia related EPSG in pyproj?

I want to convert longitude (151.209900) and latitude (-33.865143) into Australia related EPSG (4283 and 7844) by using pyproj library. I have tried: from pyproj import CRS, Transformer transformer = ...
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2answers
58 views

Georeferenced map of Iceland Stretches

I am trying to georeference a large map of iceland, and with every setting I try, the image streches out on the x axis. I have a feeling it has to do with coordnate projection, but I have tried ...
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django.contrib.gis.gdal.CoordTransform does not work

I want to convert EPSG:7844 toEPSG:4326 by using django.contrib.gis.gdal. I define CoordTransform in this way: from django.contrib.gis.gdal import CoordTransform, SpatialReference ct = CoordTransform(...
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34 views

QGIS Adding the CSV points including Lat & on to the British National Grid Project CRS

I have a problem with adding the CSV data to my QGS project with CRS set on the British National Grid EPSG:27700. In turn, my points are at the beginning of the coordinate system like you see below: ...
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56 views

Adding height values to map in QGIS

I am facing a couple of issues - I think they are related. Firstly... I am attempting to add height values to my habitat survey map to produce a 3D map in QGIS 3.12.3. I have height values stored in ...
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218 views

Coordinate Reference System in QGIS: Project vs Layer

I do not understand why there can be in QGIS different CRS for project and for layers. I have worked previously with subsurface petroleum software and there CRS "stuff" was lot more strict ...

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