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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Using rounded/unique projections in QGIS
I'm working on creating visually interesting maps for practice. I'm currently attempting to map a world map in a Cassini, Gauss-Kruger, or sinusoidal projection, but I'm having a hard time convincing ...
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Add custom CRS in QGIS resources DB
I have a custom CRS that I want to use regardless of the profile I am currently working in.
I can add the CRS to resources/srs.db and to resources/qgis.db (and to profile/qgis.db).
A CRS added to ...
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Displaying a section of a map with polygons that cross the dateline [closed]
For my thesis I collected climate data from three defined polygons. Some of the polygons cross the dateline and when I plot this in R it therefore shows part of it on the left and the other on the ...
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Why did the British set both +x_0, +y_0 and +lat_0, +lon_0 to nonzero values in EPSG:27700?
I would like to understand better the historical reasoning behind some coordinate system definitions. I am working with EPSG:27700. The proj4 string of this CRS, according to gdalsrsinfo EPSG:27700 -o ...
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Which transformation option I chose after I was offered to make a choice in QGIS?
I have an src.gml file containing parcel data from the Isles of Scilly (gov.uk site). This is how I got src.gml:
wget https://use-land-property-data.service.gov.uk/datasets/inspire/download/...
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CRS coordinate correction to Google Earth
I would like to know if there is a specific correction that is applied when exporting coordinates from certain reference systems to KML/KMZ for shapefiles to be located to its actual position on the ...
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CRS of Base Maps in QGIS
I've been wondering if the CRS of base maps in QGIS (3.40.5) reprojects to the projects' CRS or the base map's CRS and the project's CRS are like two different layers where we can only work with the ...
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OGRCoordinateTransformation.Transform() gives wrong coordinates
I'm trying to do some local to global (EPSG:3042 to EPSG:4326) transformations in a ROS2 c++ script using GDAL.
OGRCoordinateTransformation *Transformation;
OGRSpatialReference poLocal, poGlobal;
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Modified/custom coordinate system in ArcGIS Pro for small scale map of Russia in polar projection
Our development team is currently in a conundrum of trying to accurately georeference a small scale map of Russia that is in a very specific Polar projection.
Would anyone have a recommended Custom or ...
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Can I use r.walk to measure distance in an equirectangular (Plate-Carree) projection?
In general, you can't use r.cost to measure distances on a Plate-Carree/equirectangular map because the cost of entering a square differs based on direction: 1 degree of latitude is constant, but 1 ...
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Did WGS84 change the world's Null Point from, (x,y,z)=(0⁰,0⁰,6378000m) to (x,y,z) = (0 m/m,0 m/m,0 m) in 1995?
WGS84 seems to have been established in 1984, yet the decision of BIPM to treat an angle as a derived unit of length happened in 1995.
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Hao vertical sinocentric projection [closed]
I’ve been trying to reproject the world shapefile to look like the attached picture (vertical sinocentric view) without distorting the shapefile but I’m having no luck. Anyone done this successfully?
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proj4 conversion from Trimble DC file to local system
I've got a trimble navigation definition file such as:
SC V10-70 Copyright © Trimble Navigation Ltd, 1996-2003
Angle Degrees Dist Meters Press mm Hg
Temp Celsius Coord N-E-Elv H.obs Right
JOB Job ID ...
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Create Grid working not as expected
I want a 5x4 grid to define an atlas for export.
The extent is -3903052.0356,4029046.6448,2035925.7043,8264176.2162 [ESRI:53078]. I confirmed the extent is accurate with the 'extract layer extent' ...
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ArcGIS Pro graticule shows repeated 180° longitude labels in Equal Earth projection
I am working in ArcGIS Pro and added a graticule to a world map. The map is using the Projected Coordinate System: Equal Earth (Sphere). On the layout, the longitude labels along both the left and ...
