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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.

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Coordinates are a bit off

I have a puzzle that I have a hard time solving. I have downloaded administrative data from DIVA-GIS of Guatemala (which is in wgs 84) and I have coordinates (in excel) of some towns that I know are ...
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NAD83 to NAD83(CSRS) transformation for Northwest Territories, Canada

I am looking to determine the correct Grid Shift Binary (gsb) file for transforming data from the NAD83 original to NAD83(CSRS) geodetic datum for the NWT in Canada. I was able to find reference for a ...
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ITRF96-ED50 tansformation?

I need to transform ITRF96 coordinates to ED50.(for Turkey). ITRF 96 TM 27 3 to ED50 27 3. Is there anyone have these parameters?
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How to match CRS between two datasets?

I'm working with gSSURGO soil data I downloaded from the NRCS data gateway as a compressed file. I extracted the .gdb and drag/dropped it into QGIS. The MUPOLYGON layer is what is of interest to me. ...
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Finding 3D data with two 2D data

Assume that I'm working over the earth and I have 2 known LLA position and 1 unknown target position. Lets call them sensor1,sensor2,target. I have the azimuth(due to true north) and elevation angles ...
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LLA to ECEF, azimuth correction

When I'm working with latitude,longitude,altitude(LLA) the azimuth angle between two LLA points is due to true north. I have noticed that this azimuth angle is not the same azimuth angle when I ...
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Windowed read of a raster producing wrong projection?

I'm using rasterio to read in a .tif file and converting it to vectors using the rasterio.features module. For a particularly large .tif file, I thought I'd use the windowed read option, but for some ...
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Failure to re-project SpatialPolygonsDataFrame to Equidistant Cylindrical in R (units problem?)

I am trying to re-project a shapefile to match the projection and units o Black Marble nightlights data (link below) which comes in a raster with Equidistant Cylindrical projection, units in meters. ...
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Viewshed Analysis Raster layer turns black? [on hold]

Whenever I try and create a viewshed analysis the new raster layer is just one black square. Trying to create using a raster terrain layer and targets of 9m. What am I doing wrong?
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Converting lat,lon to x,y coordinates with pyproj

I am trying to convert lat,lon to x,y coordinates in France, using the pyproj library and what I am doing is obviously wrong. Here is some of my code: import pyproj import math PROJ='+proj=utm +...
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For what ist the epsg-file in the “share/proj” subfolder of the QGIS - installation used for?

In the "share/proj" subfolder of the QGIS-installation there is an epsg-file with definitions of the epsg-codes like this: # DHDN / 3-degree Gauss-Kruger zone 3 <31467> +proj=tmerc +lat_0=0 +...
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What do version numbers in CRS IRIs mean?

By following the links on http://www.opengis.net/def/crs/ one can download identifiers/IRIs for various CRSes minted by the OGC. For many CRSes, there seem to be multiple identifiers, differing in ...
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Coordinates to Lat/Long Conversion

I'm trying to convert a GeoJSON Coordinates Point to latitude and longitude format, but I don't know exactly which is the format they have or which is the coordinate system they are expressed in. I ...
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How to work with projections - shape files indicate all shape file are located south of North Africa [duplicate]

I am trying to follow the standard QGIS tutorial for Swellendam based on QGIS version 2. Specifically the chapter which address coordinate systems If I go to a layer and try to re-project it from WGS ...
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42 views

Using transformation parameters in ArcMap? [on hold]

I have transformation parameters for location which name is MILAS. So, how I can use this parameters for transformation? Which folder should I put? Link to a copy of the file: https://files.fm/u/...
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Calculate angle between nodes or point in line in QGIS

I want to check the digitization of line in correct direction, so for that I need to know the angle of each node in line. Is that possible in QGIS?
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Can someone explain this GeoServer data step by step?

I've been playing around a bit with GeoServer and QGIS, following some basic tutorials on the Geoserver website. I managed to get a map to display buildings in Manhattan. But when I look at the data ...
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Setup shadedrelief background in basemap using a cropped orthographic projection

I'm trying to plot a sector of the world in basemap using an orthographic projection and I would like to have a shadedrelief background. If I don't use shadedrelief everything works fine: import ...
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Reconciling elevation difference between SRTM and old US Army map in Laos?

In QGIS I georeferenced a 1970 US Army contour map for part of southern Laos (20 m intervals) with the following indicated properties: Horizontal datum Indian datum 1960 Spheroid=Everest Verical ...
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1answer
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Circle turns into ellipse after converting it into raster in ArcGIS Pro?

I have a polygon layer that contains a circle and an irregular polygon and I want to convert it into a raster in ArcGIS Pro. When I do that, the result is a raster containing the irregular polygon and ...
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How to convert from EUREF-FIN to WGS84 in geopandas

Trying to convert ETRS-TM35FIN coordinates in the EUREF-FIN projection to WGS84 in geopandas with this: x = 429300 y = 7084490 df = pd.DataFrame([[x,y]],columns=['x','y']) df['Coordinates'] = list(...
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Converting x, y, srid to latitude / longitude

I have positions in JSON as x, y and srid ({"x":740370,"y":1045712,"srid":5514}). What would be the way to convert them to simple Latitude / Longitude ones (srid is different on other positions)? (...
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How to recenter extents of my coordinate system in QGIS?

How do I change the extents of a projection of the world so that longitude 90W is centered? I'm working in WGS84. Perhaps I need to add some clarification of my objective. I have a dataset of the ...
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2answers
32 views

Define projection on raster problem

I have a raster map that needs to be defined in 2 different coordinate systems. I added control points to my unprojected map and rectified it. It's OK for the first coordinate system. (European datum ...
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1answer
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Projection problem when opening a .netcdf file on qgis

I am working with GPM(Global Precipitation Measurement) satellite data which are in .netcdf format. When I open the data in qgis it is in a different projection and I can not overlap the shape for the ...
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Integrating NTv2-transformation in QGIS?

I am wondering what's the correct way to integrate a NTv2-transformation in QGIS. I have successfully integrated a NTv2-transformation in QGIS but I am not sure if it's done the way it's meant to be. ...
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Pulkovo Transformation parameters in QGIS 2.18

I'd like to use a 7-Parameter transformation between Pulkovo Geodetic CRS (EPSG 4178) and ETRS89 Geodetic CRS (EPSG 4258) in QGIS. There are different sets of transformation parameters for this task. ...
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From GPS coordinates to MODIS sinusoidal projection

In my development code, I am currently using GPS coordinates to locate the MODIS map tile that used Sinusoidal Tile Grid coordinates. From the GPS coordinates (Latitude, Longtitude): 1.441403, 103....
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1answer
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QGIS heatmap issue

I'm trying to create a heatmap on QGIS 3 from a layer based on a 20,000-entry CSV file with longitude and latitude values, using EPSG:4326 as the CRS. The layer itself looks fine, the markers are ...
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Reprojecting a SHP in QGIS to used it in ERDAS

I´m trying to created a AOI in ERDAS with a shapefile, but this shapefile had a projected system different to system that my image has, because of that I changed the projected system of the shp in ...
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Bad projection from 4326 to 3857 Android

I have a point in Lat/Lon. I have checked in https://epsg.io/ thet the coords are ok, and are in the point I need it to be. My coords are 39.936421413580305,-0.11867087841782467. If you go to the ...
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Why 2 layers in the same projection do not overlap in QGIS? [duplicate]

Can someone please explain why my project CRS which is in PRS92 (EPSG:3124), and the layers are in the same projection but do not overlap. But when I change one of my layers in WGS84, the values are ...
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Changing Units of a prj file in ArcGIS

I have a multipatch feature class which comes from a conversion of a IFC model. Its coordinate system is very strange ("IFC_COORD_SYS_0") and I'd like to change it to EPSG:32632. I am using ArcGIS ...
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rt_raster_from_two_rasters: The two rasters provided do not have the same alignment

I have a set of geometries in my database which I used to create a set of rasters (each raster has a unique color). Now I would like to merge all of these rasters into one but get an error such as : ...
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Using new Australian Datum GDA2020 in SQL Server 2016?

We have several hundred datasets/spatial layers within SQL Server 2016 which has the geometry datum/projection of GDA1994 Zone 54 (EPSG:28354) and we wish to reproject/shift the spatial locations to ...
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1answer
16 views

State Plane Scale Factor in WKT

I need to convert an old-style projection file (created with Global Mapper) to a WKT format for use in my GIS program (ArcMap or GDAL or whatever). The problem is that my old-style projection file ...
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1answer
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What is the history behind WKT and proj.4? [closed]

What is the history behind WKT and proj.4 formats for defining coordinate systems? Does one have advantages over the other? Why do both exist? I'm guessing they were developed independently for ...
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1answer
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Seeking appropriate CRS for Philippines while learning QGIS?

What is the appropriate CRS for Philippines? I'm trying to figure out what is the best CRS for Philippines while learning QGIS.
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1answer
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Dynamically changing spatial reference using ArcGIS API for JavaScript?

We have a web application that has tiled layers published in GCS. We want to publish a replica of the layers in a different projection system such that : When a user is at a specific zoom level, ...
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1answer
52 views

How to use gridfiles (*.gsb) in QGIS

When opening a data source in EPSG:25832 in a project with crs set to EPSG:31468 I'm prompted to select a datum transformation (e.g. +nadgrids=BETA2007.gsb) The nationwide standardized gridfile for ...
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Converting Legacy Dataset With Self-Defined Grid to UTM

I'm striking out in converting a legacy dataset to a UTM reference. The only information in the paper regarding the grid is that it defines the "project grid" relative to a UTM grid (UTM 5N; NAD27): ...
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Unexpected values when projecting a shapefile from WGS84(DD) to UTM, and when using polygon to raster tool?

I am working with a shapefile of all the building footprints in Chicago, downloaded from Building footprints in Chicago. The goal with this dataset is to change the coordinate system to UTM Zone 16N ...
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1answer
20 views

R error reprojecting from EASE 2.0 to WGS84

I have a data file which is in the EASE 2.0 grid (EPSG:6933) which read in with raster looks like so: class : RasterLayer dimensions : 3000, 3000, 9e+06 (nrow, ncol, ncell) resolution : ...
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2answers
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Unable to use GPS coordinates for GEOTiff map

I have been using a map to calculate some distances at sea. The map had a bit low resolution so I got another one with better resolution (both GEOTiff), but with the amounts of distances I need to ...
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1answer
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British National Grid and WGS84 conversion doesn't match in reverse in GeoPandas/PyProj

When I try to convert Google Map's lat/long into EPSG:27700 and then add a 50-meter buffer, I'm getting unexpected results. I noticed that conversions in pyproj between WGS84 and BNG are not ...
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1answer
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Separating list with coordinates in two different coordinate systems using ArcMap?

I have an excel list with approximately 10.000 poles which I want to export to a Point layer to view in ArcMap. However, the coordinates are a mix between SWEREF99 and RT90 and I am not sure how to ...
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2answers
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Oracle DB tables extract with python

I have an Oracle database that I have been extracting the certain geometry tables into QGIS and then creating shapefile files for those tables. Does anyone have any tips or tricks to automatic the ...
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County borders/boundaries, OpenStreetMap, basemap

I have a shapefile that is in coordinate system Balkan MGI 6. When I put a base map, which I need, the borders of county do not match the borders I have. Not only spatially but by shape as well. How ...
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Nomenclature grid for GK42 Pulkovo ArcGIS for Desktop

I'm stuck with this problem - I need to write a scripts preferably on ArcPy, that create grids with different scales using Pulkovo 1942 projection with nomenclature labels e.g. for 1:1kk - N-37 and ...
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1answer
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Displaying WMTS-Layer in custom projection (EPSG:25832) using OpenLayers?

I have the URL of a WMTS server which provides map tiles in EPSG:25832 (ETRS89 / UTM zone 32N; I'm sorry I cannot post it as it contains user credentials). If I connect to this server with QGIS I can ...