All Questions
Tagged with transformation or coordinate-system
8,591 questions
0
votes
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36
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Point outside of projection domain (Error 2050)
I downloaded the World UTM grid from ESRI and placed it into a PostGIS database. I can see the CRS of the service is EPSG:4326 and that's also what I used for the PostGIS table.
I am getting input in ...
- 1,217
-1
votes
0
answers
60
views
Using QGIS without SCR
I'm looking for a way to use QGIS without SCR (I'm using QGIS for analysing drawings and I would like to have less deformation as possible.
Is there a way to have no SCR in the process or is there any ...
- 1
0
votes
0
answers
19
views
QGIS MS SQL Server Points plotting incorrectly
I have set up a MS SQL server link to a database and the data is coming in great but it looks to be plotting just a few metres off in the northing and the easting. I have brought the same data in as ...
- 1
2
votes
1
answer
47
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Problem with gdal.warp reproject image while reducing resolution
I aim to reproject MODIS burned area (MCD64A1) data (Sinusoidal projection) to WGS84. In addition to reprojecting, I need to resample the origin bool image (burned or unburned) using mean algorithms ...
- 63
1
vote
0
answers
23
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What Projection String could be used for creating something similar to the Chinese Vertical Map?
I recently saw this Vertical Map made by a Chinese Cartographer.
I want to create a similar map in QGIS, and for that, I need the CRS string or the Projection String.
The only detailed information I ...
- 41.6k
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0
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59
views
TurfJs intersection issue
I am trying to implement map objects (Street Zones) which will if intersect with other street zones, bend them around. I've implemented next logic: when the drawing of zone is finished, I am trying to ...
- 1
0
votes
1
answer
31
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Discrepancies in EPSG:3857 Spherical/Web Mercator World bounds
This Question Spherical Mercator - World bounds
is answered by this Answer,
which cites https://epsg.io/3857 with the following bounds:
xmin: -20037508.3427892,
ymin: -20037508.3427892,
xmax: 20037508....
1
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0
answers
41
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Why WMS and vector layers are not visible in EPSG:3879?
I have added WMS layers and vector layers in the Finnish coordinate system ETRS-GK25 EPSG-3879, which is the coordinate system used by the source of data. However, QGIS doesn't want to show these.
...
- 11
1
vote
1
answer
29
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JGD2011 and X Y Z coordinate problems with QGIS
I'm having some likely CRS/projection issues using QGIS.
I have coordinates provided in an XYZ format that's saved as a csv.
I import the CSV as a delimited text layer with a CRS of ESPG6676 JGD2011 ...
- 207
0
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0
answers
39
views
QGIS - GPKG appears in wrong hemisphere
I am attempting to make use of a GPKG produced by a US federal agency (that does a lot of mapping) that is misbehaving. I have another similar GPKG from the same agency that works as expected.
The ...
- 21
1
vote
1
answer
45
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Figuring out coordinates written as long numbers, no decimals
The label of these specimen tags says "NAD27 ConUS" which I know is the coordinate system, but this doesn't explain the coordinates which are written as "716935, 3474948".
The site ...
- 13
0
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0
answers
40
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Portable way to set PROJ_DATA path when installing proj/gdal with vcpkg
Edit:
It appears that my issue had to do with installing gdal (and later versions of PROJ) with vcpkg. PROJ was looking in the wrong place for the PROJ_DATA dir where the required proj.db is located. ...
- 131
0
votes
1
answer
64
views
How can I completely solve all issues related to antimeridian?
Assume I want to work with raster and vector data for regions near antimeridian (180 degrees).
Known problems are:
Incorrect visualisation of polygons (and probably features of different types) ...
1
vote
0
answers
41
views
"Cannot import http://spatialreference.org/ref/epsg/3812/ due to ALLOW_NETWORK_ACCESS=NO" error in PyQGIS
I am building a headless PyQGIS application that will need to be integrated into a bigger system.
Everything works, but when reading a layer from a GML file, the output keeps printing:
Cannot import ...
- 1,367
0
votes
1
answer
21
views
QGIS The grid line did not show in the layout
I'm currently working on a project using QGIS 3.38.2-Grenoble on windows 11. The data come from a DTM raster file that I exported to QGIS CRS: EPSG:3824 TWD97. The CRS for the grid I'm also using the ...
0
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0
answers
11
views
Adding line and polygon feature into the panoramas in Pano2VR
Is it possible to get the line and polygon feature into the panoramas by using GIS, Pano2VR, and any additional software or apps? I mean adding the line and polygon features to the panoramas inside ...
0
votes
1
answer
37
views
How to transfer the GeoTIFF coordinates to pixel values
I have a function to convert the pixel values to the coordinates using the ground control points from the GeoTIFF file, which is given as below:
import rasterio.control
import rasterio.transform
def ...
- 101
2
votes
1
answer
46
views
Set max bounds for tiled layers with different resolutions in Leaflet
I'm trying to create a map with raster images using Leaflet's TileLayer and CRS.Simple projection. I want to be able to switch between two images with different resolutions:
Image one: 5120 x 3840
...
- 123
1
vote
1
answer
32
views
Export projected coordinate in ArcMap
I have some points with EPSG=4326. I saved it as EPSG=3824 and imported it into ArcMap again. Then I used Data Management Tool > Features > Add XY Coordinates to add x and y coordinates to the ...
- 31
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0
answers
15
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How to scale a view matrix to display a nautical chart in correct compilation scale?
Background
I'm developing a nautical chart viewer app.
The source data (Electronic Nautical Chart) used is a vector-based chart. The geometry is given in latitude and longitude coordinates. The app ...
- 111
-2
votes
1
answer
82
views
Converting between latitude/longitude and non-standard x/y projections [closed]
I am using R and I have two datasets of the following:
df=data.frame(longitude = c(-113.2692,
-113.1958,
-113.2072),
latitude = c(...
- 452
2
votes
1
answer
65
views
Orthographic projection extent in QGIS
I have a world-map-layer in QGIS, such as the one by typing "world" in the coordinate box.
I then set the project-crs to a custom orthographic projection. The world-layer gets reprojected on ...
- 1,379
2
votes
1
answer
114
views
Same CRS but different location in QGIS
In QGIS I have two files supposed to be located in the same area but they're not overlapping.
The first one is a shapefile of buildings downloaded with projection "CH1903 / LV03" and ...
- 21
2
votes
1
answer
67
views
Sorting Recently Used Coordinate Reference Systems list in QGIS
I want to sort alphabetically all CRSs in the Recently Used Coordinate Reference Systems list in QGIS. But I can't find a way to do this using the user interface.
How one can sort them using PyQGIS?
- 8,208
0
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0
answers
26
views
How to a pixel from one GeoTIFF onto another using proj
I have two GeoTIFF rasters, each with their own proj4 string. I need to take all of the pixels from one raster, and map it onto the other. Some of the pixels may not actually land on the other, but ...
- 131
0
votes
1
answer
58
views
Coordinate system of a screenshot from Google Earth
I have received a transport assessment for an intersection (swept paths created in CAD) and learnt the way it was created was by drawing an line in Google Earth - a known measurement (for example 20m) ...
- 71
0
votes
2
answers
52
views
DA2 Trimble Receiver and Field Maps Integration
I have a few questions.
I’m using a DA2 Trimble receiver with their correction service for accurate mapping (Trimble Catalyst, centimeter level). I want to send this data to Field Maps instead of ...
0
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1
answer
55
views
Does anyone know the ESPG code of this projection?
I'm looking for the ESPG code of this projection.
0
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0
answers
50
views
Concatenating Pandas dataframes into one GeoPandas dataframe
I am trying to concatenate three geodataframes with different CRSs. Before that I made sure I convert them to similar CRS (4326) as follows but still the concatenation is not working. What is wrong?
...
- 485
2
votes
1
answer
81
views
+50
Choosing projection for islands in South Pacific (specifically Tuvalu)
I'm working on a project for Tuvalu and most projections cut off pretty much exactly where Tuvalu is. They are ok for zoomed in maps but as the map cuts off directly to the east I can't show ...
- 81
1
vote
0
answers
19
views
Geographic transformation issue
I have a point feature class in GDA94 Zone 54. I want the coordinates for each point in GDA94 Zone 54, but also want them in GDA2020 Zone 54. My ArcGIS project is in GDA94 Zone 55. When using ...
3
votes
1
answer
152
views
Explanation of syntax and parameters of a sample UTM projection file [closed]
I am interested to have explanation of syntax and parameters of a sample UTM projection file, reproduced below;
PROJCS["[email protected]",GEOGCS["GCS_WGS_1984",DATUM[...
- 41
1
vote
1
answer
29
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Offset after georeferencing Comoros topo map to WGS 84
I have some scanned paper topographic maps of Comoros with the following projection information:
I believe that this corresponds to EPSG:2999. However, after getting good control points in the QGIS ...
0
votes
1
answer
65
views
gdalwarp error 1 : Too many points failed to transform, unable to compute output bounds
GDAL ver: GDAL 3.9.3, released 2024-10-14
OS: Linux (Pop!_OS 22.04)
Input Raster dimensions : 202500, 165000, 1 (nrow, ncol, nlyr)
Input Raster resolution : 30, 30 (x, y)
Input Raster extent :...
- 183
1
vote
0
answers
23
views
How to convert a BYN type file into either a EGM or GRD file to upload into my data collector
I'm trying to upload a geoid model onto my Leica CS14 data collector but the data collector only accepts EGM file and Grd/Gsf files but when downloading the geoid model from the Canadian government ...
- 11
1
vote
0
answers
33
views
Cartographic work in 4326 QGIS project
I am working on a project in QGIS whose CRS must be set to 4326. The problem is that when moving around the project map (without zoom in or out) the scale does not remain constant.
This is an ...
- 73
0
votes
1
answer
32
views
How to set the CRS correctly PyQGIS to display points on top of OSM basemap
I want to load OSM as a background map and plot some points on top of it. And I want to use PyQGIS to write to a QGIS project file because that's the easiest way to share the data with my particular ...
0
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0
answers
29
views
Custom datum transformation pyproj from unknown CRS to WGS84
I have a set of location points that represents real points on earth in Easting and Northing, but these records have lost their information of their original datum, e.g. :
Point
Original X
Original Y
...
0
votes
0
answers
11
views
CloudCompare Mesh OBJ not saving coordinate system
I have a LAS file which I have meshed in CloudCompare
I've output as an obj, and tried to upload into Cesium Ion - however, it's not appearing in the correct location?
I assured I kept the position ...
- 11
1
vote
2
answers
82
views
Algorithm to convert old map sheet number and grid refs to lat and long - Irish Ordnance Survey 1/2 inch maps [closed]
I have a list of 80 locations from an ecological survey in the early 1980s, and they are referenced by sheet number followed by 6 figure grid reference.
The sheet numbers are of the Irish Ordnance ...
1
vote
1
answer
95
views
How would I calculate the coordinates for the points based on the info on this old map?
I am busy with historical research in South Africa and would like to know how to calculate the coordinates from old maps that I am using for research. I need to use the information on Google Earth?
...
0
votes
0
answers
14
views
How to project top view and side view from the point data (created from xyz file obtained from preprocessing of point cloud data) in QGIS?
I need to create two rasters (top view and side view ) from the point data I obtained by pre-processing the point cloud data from RiSCAN pro. I know that for top view I need to project it to XY plane ...
- 1
1
vote
0
answers
55
views
Are latitudes and longitudes the same in WGS84 and NAD83 system?
I am processing some drone data. I was provided ground control point's location information. The CSV file provides the latitudes, longitudes, and altitudes of those points. The projection system is ...
- 267
0
votes
1
answer
43
views
Calculating bounds for slippy tile
Have noticed a great number of libraries that calculate the bounds for a tile like so:
def TileBounds(self, tx, ty, zoom):
"Returns bounds of the given tile in EPSG:900913 coordinates"
...
- 1
0
votes
0
answers
53
views
Exporting shapefile from Civil3D to QGIS goes to wrong location
I am trying to export shapefiles from Civil3D to QGIS. My Civil3D drawing is set to NAD83 Pennsylvania State Planes, North Zone, ft" (EPSG 2271), and my QGIS file is set to the same coordinate ...
- 1
2
votes
1
answer
45
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How to adjust a point in proj?
proj_geod returns a PJ_GEOD (geodesic), which contains the distance, the forward az, and the reverse az between two ordered PJ_COORD under ellipsoid projections such as EPSG:4979.
I want to adjust (or ...
- 131
2
votes
1
answer
110
views
Converting MGRS to Lat/Long creates inaccuracy from expected position
I have a table with the following data.
Location
Easting
Northing
Point A
7482
0837
Point B
7675
0576
I think these locations use the Military Grid Reference System (MGRS).
If this is true, then ...
- 41
0
votes
0
answers
19
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NLCD pixel area measurements are larger than my areas of interest
I was having trouble calculating the volume of grasslands in subbasins, because whereas grasses appeared to be 50% on the map, when I multiplied the cell counts by 900 the products were sometimes ...
0
votes
1
answer
65
views
CRS name is filled in but EPSG blank
I am reading in some shapefiles that have matching shapefile properties in Arc but after reading them in and checking with terra::crs() in R one spatVector has NA for authority and code. In shapefile ...
2
votes
0
answers
89
views
Mapping pixels of one GeoTIFF to another
I need to map the pixels of one GeoTIFF onto another. Both are of the moon.
My thought process was to:
Convert a pixel on the source tif into the source model-space using the source tif's ...
- 131