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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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Trying to find zenith and azimuth angles to satellite

I am working with satellite data. Each scene is approximately 30km squared with 1024 * 1000 pixels. I have the zenith and azimuth angle for each of the four corners, plus the center. I have latitude ...
sil's user avatar
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12 views

QGIS specify map units for a document that does not have a projection defined

I have a QGIS project that does not have a coordinate reference system defined. This is deliberate, as I am working in a simple cartesian x,y model. The units of layer files are meters, and I want to ...
SJC's user avatar
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Finding the right Projection/CRS for a 2000's era shapefile of Bosnia Herzegovina

I have been looking for a historic soil map shapefile of Bosnia & Herzegovina for a while and finally found one - a UN FAO project archive had the files available, albeit designed for ArcView. The ...
Needs_Caffeine's user avatar
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30 views

Georeferencing HiRISE images (Martian North) in QGIS 3.36 for geometric calculations

I want to run various geometric measurements on Martian structures in QGIS. Therefore I downloaded a JP2 Black and white map-projected HiRISE image (https://www.uahirise.org/PSP_007372_2475). As I am ...
marla's user avatar
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Trouble preprocessing data in EE for machine learning,

I'm quite new to Earth Engine/QGIS (don't have an ArcGIS license), and I want to use a simple ML model to estimate ground-level O3 using satellite VCD, NDVI, and meteorological data. I am very lost in ...
pmarfatia's user avatar
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29 views

Reproject tool and Python commands not working in QGIS project [closed]

I am working with a layer that is in EPSG 26911 and I need to reproject it to EPSG 3857. When I open the reproject tool I am not able to select or add an input layer. I tried using Python to ...
Heather Shaw's user avatar
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Reading MSG Native(.nat) file with satpy

I am trying to read an MSG (Meteosat Second Generation) file given in the native(.nat) format using satpy. I tried using: import numpy as np import os from satpy import Scene import matplotlib.pyplot ...
The Emerging Star's user avatar
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Is azimuth preserved in EPSG:3857?

I am trying to draw the outlines of drone images using OpenLayers. The drone has recorded a "yaw degree", which should be the azimuth. However, when I place the rectangles on the map, their ...
Džuris's user avatar
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33 views

Convert from local to absolute coordinate having four georeferenced points

I am attempting to determine the absolute positions of several points acquired via a total station survey. I had also obtained local coordinates for four points (the vertices of the red polyline) that ...
Marco Cangemi's user avatar
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Aligning raster with shapefile

I have a raster file which I need to align with a shapefile. I tried gdal warp to reproject it to EPSG 4326. When I tried doing it, I get an error message ERROR 1: The transformation is already "...
proy's user avatar
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How can I define an Area of Interest a certain distance from a set of coordinates on the Web Soil Survey website?

I'm trying to help automate a sequence of actions that involves downloading soil data for a specific area of interest at https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx. The tool allows ...
Starnes Student's user avatar
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Problem displaying GeoJSON data EPSG 4326 in Mapbox

I'm converting data from an S57 file that has an EPSG:4326 projection to GeoJSON, and then adding the data to a Mapbox. const ogr2ogrArgs = [ '-f', 'GeoJSON', '-s_srs', 'EPSG:4326', ...
trmd's user avatar
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1 answer
43 views

Importing layer data to QGIS from UMAP and converting it into correct Coordinate Reference System

I have drawn some polylines in the UMAP and saved them as a layer. Later, I figured out that QGIS is more suitable for my project. Then, I am trying to export the data from UMAP to QGIS. The data can ...
Light's user avatar
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Python - How to spread out a set of coordinates so that they're not within 10 miles of each other?

I'm plotting a scatter map with plotly, and I have a lot of markers that are overlapping and very close to each other. This may be convoluted, but I'm trying to spread them apart by tweaking each ...
user247900's user avatar
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40 views

Python - Given a lat/long coordinate, how do I get the coordinates of that address just a few miles north/south? [closed]

I'm trying to plot a set of coordinates onto a USA map using Plotly. Unfortunately some of the markers are very close to each other and they're overlapping. I'm trying to programmatically spread the ...
user247900's user avatar
1 vote
1 answer
17 views

Segmentation label/ masks for GIS data

I'm trying to create segmentation labels/masks using a terrain GIS dataset to locate some objects (like trees). For the labels of trees, do I need to convert the geographical coordinates to pixel ...
jerome's user avatar
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25 views

How to set projection for Pacific-centered raster

I have a project in QGIS that I need to add a raster file to (.nc). The projection is EPSG:4326, but its boundaries are 0 to 360. How can I center the raster over the Atlantic ocean (180). Or, change ...
tony_c_graphics's user avatar
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35 views

Difference between coordinate systems

I am wondering about the difference in coordinate systems. What is the difference between between EPSG:4326 and EPSG:6326?
noob_noob's user avatar
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38 views

Vector layer still misaligned after reprojecting

I'm new to QGIS, and trying to figure out why my vector layers are still misaligned after reprojecting. I am using ESRI topographic basemap EPSG:3857 WGS 84 Two datasets I have overlayed display ...
Grace's user avatar
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Displaying two different layers in the same coordinate systems in QGIS

This looks like an easy solution but, for the life of me, I cannot manage to solve this. I have browsed this website where solutions were provided but unfortunately, none have produced the desired ...
Olivier Hubert's user avatar
2 votes
1 answer
109 views

Detecting actual CRS when coordinate in WGS84 is known

My geodataframe includes some points of unknown coordinate reference system, each point has address as well, so I am able to find coordinates for them in WGS84. An example point is: POINT (472593....
szaki's user avatar
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Incorrect distances when measuring on QGIS, leading to buffers and density maps being much larger

I have created a boat traffic map on QGIS 3.36.2. Here, I have a vector layer containing different points connected to show the boat routes in the Andaman and Nicobar Islands in India. To ensure that ...
Amisha Nakhwa's user avatar
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Not finding EPSG:2964 while setting CRS to work on Albers Equal Area for Alaska dataset

I want to work on Alaska dataset as guided by the QGIS manual that is provided in the portal for which I am providing the link - https://docs.qgis.org/testing/en/docs/user_manual/introduction/...
Amulya's user avatar
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1 answer
34 views

projectRaster() very slow [closed]

I am a R learner and I am trying to do some linear regression using RStudio. I have a few rasters but they have different CRS so I need to reproject them. Here is one example. The raster I used is ...
jyy0610's user avatar
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1 answer
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QGIS custom CRS changes negative eastings to positive westings

I have a situation where I would like to make a custom CRS in QGIS that changes negative eastings to positive westings. Does anyone know how to do this?
Taona Shumba's user avatar
1 vote
1 answer
87 views

Reprojecting vector layer does not reproject in QGIS 3.36.0

Using QGIS 3.36.0 Maidenhead on Win10, I have a strange behaviour: Reprojecting vector layers (with Reproject layer) does reproject, but invariably to EPSG:4326, and with the wrong CRS definition ...
Babel's user avatar
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QGIS UK 1940s military Cassini grid projection

Does anyone have a quick and easy way of converting UK Cassini military grid coordinates in QGIS? I'm currently transcribing military grid references from War Dairies for units in the UK. I have to ...
Klonko's user avatar
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3 votes
1 answer
133 views

How to make annotations follow the latitude lines in QGIS?

If my map is in EPSG:4326, the text annotation is normal. However, if the projection is transformed, such as EPSG:102017, the text label does not change. I want the text label information to be ...
smilecc's user avatar
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2 votes
2 answers
66 views

Obtaining list of all EPSG code for a single location on map

There are APIs like https://epsg.org/info-api.html, maptiler which takes text input like "San francisco" and returns EPSG codes, but the problem, is I am not able to find a library or a tool ...
uk2797's user avatar
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0 answers
30 views

QGIS export as GeoPackage not maintaining the input CRS

I have a template QGIS project in which I run certain basic analyses, buffers and clippings (EPSG 3857 to allow for meter and kilometer buffer distances). These buffers and clips are then exported ...
user245398's user avatar
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48 views

Fix for incorrect pixel size post transformation

I have a .tif in WGS 84 and one in EPSG 32632. EPSG has a resolution of 10m (so the pixel sizes are 10). When I convert WGS 84 into the EPSG 32632 CRS, even after specifying that the new resolution ...
tds's user avatar
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2 votes
1 answer
42 views

Projection with transformation returns unexpected results using GeoPandas compared to ArcPy

I am using GeoPandas to project a geodataframe of polylines representing water crossing locations across the USA from ESRI:102039 (NAD 1983 USGS Contiguous USA Albers) to ESPG:3857 (WGS 84 / Pseudo-...
mafbarth's user avatar
1 vote
1 answer
34 views

Getting the right projection and resolution when importing from ArcGIS REST on QGIS

I imported this layer on QGIS from ArcGIS REST Services, but it has no defined CRS. In my previous question I was suggested to provide the correct dimensions in order to export this raster with ...
Ana Clara's user avatar
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0 answers
21 views

How do I show the right grid projection on my EPSG:4289 map/print layout?

I am trying to show the coordinates of my map (print layout) via a grid. However, I can not get it to work. I have tried multiple things: changing CRS, changing interval units, trial and error with X/...
Sem20112001's user avatar
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0 answers
18 views

Suitable basemap for sharing Europe Lambert Conformal Conic projection layers to web map

I am trying to share layers with a projection system in Europe Lambert Conformal Conic as a web layer. However, my basemap (World Imagery) is projected in WGS 1984 Web Mercator (Auxiliary Sphere) and ...
Chananja's user avatar
-1 votes
1 answer
56 views

Leaflet map in projected coordinate system

Is there a way to show the leaflet map in a custom projected coordinated system, such as the North America Albers Equal Area Conic_1? We can do this in D3.js, but can we do it in Leaflet.js? Something ...
Abdullah's user avatar
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0 answers
42 views

QGIS: Changing map projection using satellite image

I have been working on a project for several weeks now, which shows the surface currents using OSCAR. I am using the following data set from NASA:https://search.earthdata.nasa.gov/search/granules?p=...
Toth's user avatar
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1 vote
0 answers
32 views

PostGIS: Custom projection matrix from known points

I have a PNG image of a map (mercator) and known points in a table like this: coord_map - geometry(Point, 0) coord_real - geometry(Point, 4326) 010100000000000000000000000000000000000000 (0,0) ...
JaFu0815's user avatar
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0 answers
34 views

Bounding box intersection when crossing date-line and meridian

First of all, I check for general intersections: public bool CheckOverlap(BoundingBox boundingBox) { if (this.UpperRight.Longitude < boundingBox.LowerLeft.Longitude) return ...
Martin Yakoslaw's user avatar
3 votes
0 answers
48 views

Adding custom CRSs and coordinate transformations QGIS (modifying the CRS/CT catalog)

I am trying to add custom CRS and transformation definitions to the CRS/CT catalog in QGIS. As far as I know, the qgis.db is meant to handle custom definitions. However, it does not contain a table ...
phaarnes's user avatar
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15 views

gdal ogr transform c++ swaps axis order x to y [duplicate]

This is example #include "gdal/gdal.h" #include "gdal/ogr_spatialref.h" #include <iostream> void TransformBounds(double xmin, double ymin, double xmax, double ymax, ...
Vignesh M's user avatar
1 vote
0 answers
28 views

Scale bar in Azimuthal but not Robinson despite reprojected layer and matching project CRS - why?

I need a world map in World Robinson (ESRI:54030) projection (or Winkel Tripel, ESRI:54042), but the scale bar won't appear unless it's set to "Map Units". Since I need KM, this won't work. ...
J_C's user avatar
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0 answers
28 views

ArcGIS Pro - empty container when adding DWG or DXF file

I am struggling with adding the DWG file to my ArcGIS Pro project. By following this video: https://www.youtube.com/watch?v=I8sbUMDbYVI https://www.youtube.com/watch?v=dZE9USM6FH8 I am struggling with ...
Geographos's user avatar
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17 views

Selecting correct extent for cartopy image

I have an image with a defined size (say, 50km x 40km) and I want to be able to place it centered at any (lon, lat) point in my map. The extent in PlateCarre units will thus be very different if is ...
Pato's user avatar
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0 votes
1 answer
38 views

Changing project CRS using PyQGIS not working

I have a fairly long PyQGIS script running in the Python Console Editor in QGIS. The script creates 5 layers: 3 layers derived from DEM data, generally in CRS EPSG:28356 (GDA94 / MGA Zone 56), and 2 ...
Tom Brennan's user avatar
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36 views

Mercator CRS that covers the extent -90,-180 to 90,180

Is there a EPSG CRS for Mercator that isn't deprecated and covers -90.0,-180.0 to 90.0,180.0?
Paul Malm's user avatar
2 votes
1 answer
58 views

QGIS: Display in ECEF Coordinate Systems issues

When the QGIS project coordinate system is set to EPSG:4978 [1] and the OSM WMTS with EPSG:3857 is loaded, the WMTS is not rendered on the canvas. However, when the project coordinate system is set to ...
Giser's user avatar
  • 21
0 votes
1 answer
24 views

How does reprojecting a .tif file work after resampling the resolution of the pixels?

Background: I have two .tif files band_06 (20m resolution, i.e pixel size 20,20) lulc ("10"m resolution, pixel size 9.994 9.992) and a .shp file square All files have the same CRS (EPSG:...
tds's user avatar
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0 answers
31 views

Can not change map unit while trying to use unknown spatial reference

I am using ArcGIS Pro 3.0.2. Whenever I add a new map to my project, the spatial reference of the map is set to Web Mercator by default [which should be none]. I want to set the map coordinate system ...
nayan's user avatar
  • 9
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0 answers
39 views

geo coordinates to relative position on downloaded satellite image

I have a bounding box coordinates that I use to download the satellite image from Bing. I have polygon coordinates inside the previous bounding box. Is it possible to get the corresponding polygon ...
Ernest Dujo's user avatar

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