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.
7,346
questions
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GEE: reduce image resolution to sum
What's the best way to accurately reduce the resolution of an image with a global extent by summing values in GEE and then export to drive?
I am trying to export this global forest carbon potential ...
0
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2answers
21 views
GeoJSON from GIS Steiermark not convertible to Feature in ArcMap
I want to convert a GeoJSON (downloaded from GIS Steiermark) to a feature in ArcMap (the JSON I want to import is a polygon of the Riegersburg in Austria). This does not work. After checking the JSON ...
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28 views
Projecting LAS to local coordinates using lastools
Is it possible to project LAS files using Open source tools eg. lastools if using a less common coordinatesystem like local swedish espg: 3008 as destination and espg: 3006 as source?
I see 3008 is ...
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32 views
Area calculation in PostGIS
I'm using PostgreSQL 14.1 with PostGIS 3.1.
I've got a UTM 10x10 km grid malla, set in EPSG 25830, that covers all Spanish territories:
I have run the following code (just to check that everything is ...
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9 views
Defining Geographic Transformation in Project Raster using ArcGIS Pro
I am using ArcGIS Pro 2.9.
I have a raster in D_NAD_1983_2011_Transverse_Mercator and wish to project it to WGS_1984_UTM_Zone_12N so I may export this projected raster as a .tif file.
I have tried ...
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16 views
Export image fails across the antimeridian in Google Earth Engine
I am trying to extract a multiband image that crosses the international date line. Earth Engine will export the image with the correct regional footprint, but any pixels that cross the antimeridian ...
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13 views
Choosing projection for mapping urban sprawl in Dubai
I am doing an urban sprawl classification on Dubai with imagery from Landsat 8 and Landsat 5, in 2015 and 2000 respectively. I was wondering if anyone had a suggestion on the best projection for this ...
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19 views
Transferring TIFF-File (EPSG:3035) located in Irael to Germany (EPSG:25832) using QGIS
I've loaded 4 TIFF-Raster-Files (EPSG:3035) in QGIS. Unfortunately those are located in other countries than they need to be. (Need to be in Germany..)
The last time using TIFF-Files it worked out to ...
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15 views
Looking for exact geocoordinates and/or zip code of location of nearest hub identified with "Distance to nearest hub"
I used the "Distance to nearest hub (line to hub)" tool from the QGIS processing toolbox to determine the distance between over 8.000 polygon centroids and a line layer. That worked ...
1
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1answer
42 views
Creating rectangles from global point data of approximately consistent size in EPSG:3857 using QGIS
I have a point layer of global city locations taken from the Esri data here:
https://www.arcgis.com/home/item.html?id=6996f03a1b364dbab4008d99380370ed
I'm trying to create a rectangular bounding box ...
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25 views
Point data appears in middle of ocean but CRS is same across layers using QGIS
I have seen similar questions, have followed the advice, and still can't get it to work.
I am trying to add point data to a map. I have set my map and data layer to the same CRS (WGS 84), but still my ...
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35 views
Reprojecting of raster using QGIS
The raster I am trying to reproject is found here https://psl.noaa.gov/data/gridded/data.gpcp.html, and it's the first one "Monthly Mean" (so you might try to do it yourselves).
Problem is ...
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15 views
Converting ETRS89 coordinates to WGS84 in ArcMap [closed]
I do have a set of coordinates in ETRS89 which I did import in ArcMap. I then tried to convert the layer in a KMZ file without success.
I think I should first convert the coordinates from ETRS89 to ...
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8 views
Converting coordinate from WRF to QGIS
I have a WRF domain called geo_em.d01.nc.
I import this domain in QGIS and I see it in blue/red as you can see in the picture.
How can I overlap this domain on my Esri background map?
I understand ...
1
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1answer
26 views
Inaccurate results when converting coordinates from shapefile(dynamic projection system file) to EPSG:3857 using geotools
I have created a functionality where I get the geometry data from the shapefile and display it on the map and table structure.
Here there is no restriction like that only some specific files can ...
4
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1answer
2k views
Why Google Maps no longer disable Mercator's projection on zoom out
Back in 2018, Google Maps start to get rid of mercator's projection in maximum zoom-out
So we can see the size of island (moreover those in poles) in it's original sizes
But today I try both in PC and ...
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34 views
Can't Project Lat/Long data to UTM
I have a set of points displayed at their latitude & longitude (derived from a CSV) in my active ArcMap document alongside a layer in a PCS (NAD '83 UTM Zone 17N). The lat/long points and the ...
3
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0answers
44 views
Is an SRID unique?
I wonder why the Authority and the SRID are often both used together to refer to a CRS, like in EPSG:4326.
Isn't the SRID unique?
Wikipedia says it is a "unique value", but also that spatial ...
3
votes
1answer
88 views
Projection of aerial image using QGIS
I am having a very hard time with a USGS Declass3 image (D3C1210-200272A025).
I have already tried different projections, unfortunately without success.
For sure, the problem is me, but I don't know ...
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0answers
17 views
In my project layers that were originally created by a Garmin 62s are projected 300 degrees/100m differently to the background mapping can you help?
In my project layers that were originally created by a Garmin 62s are projected 300 degrees offset and 100m distant to the background mapping can you help?
When I had these display problems in 'A ...
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27 views
Is there a way to search for the viewport [(x,y)(x,y)] bounding a region in QGIS?
I am looking for a way where I can draw a bounding box for an entity through the screen coordinates that I have for that entity zoomed-in
My objective is to:
Draw a rectangular box using the zoomed-...
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19 views
Fixing distortion of a polygon layer probably caused by geoid undulation
I have the following problem:
I would like to use a polygon layer marking trees with the Bing Maps aerial background imagery in QGIS (3.20.1-Odense).
But it the positions of the polygons are slightly ...
1
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1answer
46 views
Connect corners of two rectangles via SVG line in Leaflet
Assuming I have two rectangles on a leaflet map with CRS.Simple, how can I use svgOverlay to draw a <line> that connect top left corner of the two rectangles? I'm having issue with spatial to ...
0
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1answer
33 views
Re-georeference an image that already has a spatial information
I have an aerial image that already has geo-spatial information (already georeferenced), but the original georeferenced location is very rough (not accurate). I wanted to create ground control points ...
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17 views
"GSS_International_1924" to "GCS_ETRS_1989"
I need to make a Geographic Coordinate System Transformation from "GSS_International_1924" to "GCS_ETRS_1989" but my ArcMap (Version 10.4) doesn't have any method for that.
Can ...
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0answers
20 views
What CRS should I use to get the correct results for building a bussel boundary anywhere in the world?
I use a compass and a bussel to set the boundaries of a logging site. I have the coordinates of the starting point (WGS 84), the directional angles (in degrees) and the distances (in meters).
What CRS ...
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0answers
26 views
"Scaling Down" a map
I'm doing some 3D modeling (non-analytical) using DEMs exported from QGIS by clipping by a mask layer then modeling in blender. The issue is that when I bring the rasters into blender using the "...
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0answers
20 views
Choosing map projection type for flight plan
There are two projection of maps that I saw online. UK CAA is a transverse projection map, while ICAO maps are conical.
It seems that transverse map is easier for flight planing as straight lines are ...
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0answers
54 views
Map disappears after using Natural Earth projection in QGIS
I have a world map using the WGS 84 projection. I can reproject it as Miller, Robinson, or other projections, but when I use Natural Earth I or II, the map disappears. I'm applying this through ...
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1answer
27 views
Matching a raster projection to simple features spatial layer using R
I have two dataframes in R. One, df_points, has spatial information saved as points. The other, df_raster, is a raster file. I want to extract information from the raster to the points using:
rasValue ...
5
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0answers
50 views
Printable Globe in QGIS
I'm trying to figure out how to use QGIS to print a map so that it can be wrapped around a sphere. I haven't found a projection that will display the map in a way similar to these.
It sounds like ...
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0answers
19 views
How to use affine matrix to calculate row-column pair on a raster corresponding to a lat-long pair using NumPy?
I have a pair of latitude-longitude coordinates:
lat, lon = 59.87115844471202, 10.656472637769236
I have a URL for a TIFF (this - it's public).
I open it with rasterio (install: pip install rasterio),...
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35 views
GeoPandas does not write CRS in MapInfo Tab
I'm trying to convert a GeoTIFF file into a MapInfo format with Python and GeoPandas. To do that, I'm using the following code:
mask = None
with rasterio.Env():
with rasterio.open('geoTiff.tif') ...
0
votes
1answer
23 views
Accessing built in coordinate systems from ArcGIS Pro Python Toolbox tool
I am attempting to create a custom ArcGIS Pro Python Toolbox tool and some of the geoprocessing tools I use run slowly or not at all if the input DEM or environment is not projected first. I would ...
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0answers
43 views
Drawing a Custom Map Projection in D3 using Observable
I am trying to create a custom map projections in D3 using Observable, following the approach given in the d3-geo Docs. Essentially, you pass a function that takes in (lambda, phi) and returns [x, y]. ...
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20 views
Map layers disappear when new projection is defined
I am using ArcGIS Pro to define projections of 2 different layers (1 unknown, 1 WGS84) from a 3rd layer's correct projection (MGI Austria GK M31). I have also transformed the map's projection from ...
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0answers
29 views
Fit/scale 2d line in a given square
I have the below python code sample using the s2sphere library to create a bounding box around a rectangle in latitude-longitude space:
for line in self.polylines:
for latlng in line:
bbox ...
0
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3answers
61 views
Importing CSV to QGIS but doesn't work properly
I'm trying to import CSV to QGIS but have a problem with coordinates. I added CSV (with longitude and latitude) via add delimited text-layer.
Then I added OpenStreetMap and arrange the CRS
But it ...
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0answers
27 views
Determining if a GeoTIFF's projection is in spherical or cartesian coordinates
I have received GeoTIFF that may be projected into a UTM or cartesian coordinate system or may be in a spherical (lat/lon) coordinate system.
Is there a reliable way to automatically determine which ...
6
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1answer
125 views
Could this be any other geographic coordinate system than DMS?
I got given these coordinates for a point at Erdington Rugby Club, Birmingham. However, when I type them into Google Maps I get an error message and when I convert them from DMS or DDM to DD I end up ...
1
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1answer
49 views
Working with multiple layers in different CRSs using QGIS
I am trying to delineate a river basin located in Turkey. Turkey has divided in different zones as CRS. Half of my river basin locates in one zone (EPSG:2206), and the other half locates in a ...
0
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0answers
35 views
Changing origin in QGIS projection
My issue is that the QGIS print composer cannot print images that have coordinates passing beyond 180 degree in WGS84 (since it's going from -180 to 180 degree).
The area of 180 degree is in the ...
2
votes
1answer
50 views
Running proj/cs2cs command in Powershell
I'm reading a book where it says to run the following in the commandline, I think he used Linux. Therefore the command doesn't run in Windows Powershell
cs2cs +proj=latlong +datum=NAD83 +to +proj=utm +...
1
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1answer
80 views
Coordinate Formatting, trying to convert to GPS
I have a .shp file with a large number of coordinates and I'm not sure how to transform to GPS coordinates. Ideally I'd like to use Python to convert , but have not seen this formatting before:
[(...
0
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1answer
25 views
Extracting a Particular Masked NetCD4 Datapoint in Python
Suppose in Python, I have read in a netCDF4 file, as follows:
import netCDF4
ds = netCDF4.Dataset('fire_weather_index_2018.nc')
The aspects of the netCDF4 is as follows:
<class 'netCDF4._netCDF4....
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0answers
24 views
QGIS 3.16.x .gsb grid file transformation
Is there a way to add .gsb grid files for transformations in QGIS 3.16.x and above.
The instruction in:
QGIS transformation defined in srs.db tbl_datum_transform table not available in Select Datum ...
2
votes
1answer
43 views
Saving CRS information using GeoPandas
How does GeoPandas save CRS information?
globe = ccrs.Globe(ellipse='sphere', semimajor_axis=6370000, semiminor_axis=6370000)
crs = ccrs.LambertConformal(globe=globe,central_longitude=111, ...
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0answers
18 views
Raster aligned but distorted in ArcGIS Pro
I have mapped a raster image (.tif) from a MODIS image collection in ArcGIS Pro and would like it to align with a polygon (red). However, the image seems to be slanted, which I assume is a projection ...
3
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2answers
45 views
Appropriate CRS for land-use change within EU?
I'm currently studying coordinate reference systems and using ArcGIS Pro 2.8 to find appropriate CRSs for different circumstances.
To conduct an analysis of land-use change in the EU, would the best ...
0
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0answers
28 views
Proj Error when trying to save data in PostGIS database from geodjango
I want to store my raster image(tiff) in my PostGIS database I have a Django model ndvitime and I want to store my tiff image from earth engine to my database. The error arises when I want to save the ...
