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.
5,917
questions
0
votes
0answers
3 views
Swift library to convert latitudes and longitudes from EPSG:4326 into EPSG:3857
I would like to know a Swift library or method that I can use to convert from 4326 to 3857. I have referred some libraries such as Proj4Swift and Proj.4, but to no avail. The first link does not has a ...
0
votes
1answer
23 views
Determining if two locations are duplicate
I'm working on an app that will display drugstores in a map. I have a table that has all drugstores, each with its Lat/Lon.
We used several different sources to add the data to the table: the ...
0
votes
0answers
14 views
GeoPandas drops .prj file
I'm trying to create a df through a GeoJSON url, merge it with a df created out of a SQL query, and create a shapefile/GeoJSON from the output. The output has everything put the .prj file (in the ...
1
vote
2answers
49 views
Proj4 definition for WGS84 coordinates multiplied by 1000000
For some reason, a vendor found it convenient to move from a Gauss–Krüger coordinate system (EPSG:31466) to something like WGS84 but then multiplied by one million. Hence lon = 6090805, lat = 50777584,...
1
vote
0answers
21 views
Displaying “World From Space” projection pole-to-pole?
The "Earth From Space" projection automatically displays the planet with a slight tilt to it. While I am sure this is more accurate, I need to display it un-tilted. I've tried adjusting projection ...
2
votes
0answers
29 views
EPSG 3857 vs UTM coordinate
I am trying to understand the difference between the two coordinates system. By so far I grasp that EPSG:3857 is used for a web-based map like Google Maps, OpenStreetMap.
I am getting a position (in ...
2
votes
1answer
19 views
Which ArcGIS 10.7 transformation to convert WGS84 data to Washington State Plane North?
A bulk of my GIS datasets reference Washington State Plane North FIPS 4601 (US Feet). Often I get data in WGS84 that I need to transform to FIPS 4601. Ten years or so I worked though many of the ...
1
vote
0answers
24 views
How to transform camera calibration parameters to other coordinate system?
I have all camera calibration parameters (X0, Y0, focal length, R0, P0, P1, K0, K1, coarse rotation, rotation, translation) and position of the image in WGS84 (XYZ in meters) and other parameters like ...
1
vote
1answer
28 views
GCS Sphere EMEP vs GCS WGS 1984
NOAA provides QPF data on rainfall in the form of shapefiles. The shapefiles include .prj files with information on the coordinate system used:
GEOGCS["GCS_Sphere_EMEP",DATUM["D_Sphere_EMEP",SPHEROID[...
0
votes
0answers
38 views
Projection to create a grid in km
I am trying to create a 1km2 grid of Kenya but I'm struggling. I have changed the projection to EPSG:32337 but this makes Kenya about 10 metres long which is obviously not right and leads to an error ...
0
votes
0answers
33 views
How to make a simple square projection with specific coordinates in QGIS [closed]
I have been looking for ways to make our own projections but I always find complicated answers. I am a beginner and I am looking to make a simple square projection of 12288 by 12288 with x=0 and y=0 ...
0
votes
0answers
7 views
Reprojecting raster using gdalwarp “EPSG_Code: 6204”
I want to reproject a raster using the projection of other raster using gdalwarp, however, I am confronting some problems because the raster does not line up when loading them into a GIS Software.
...
2
votes
1answer
34 views
Seeking documentation about non-iterative UTM to Lat-Long projection formulas
In
Hager, John W., James F. Behensky, and Brad W. Drew. "The universal grids: Universal transverse mercator (utm) and universal polar stereographic (ups)." DMA technical manual 8358 (1989).
I ...
1
vote
1answer
65 views
Using flat earth projection in QGIS
This is a flat earth model:
flatearth
Yes, it's funny, no, I'm not a flatearther. My interest is just exploring how the world would look like if the Earth would be flat according to this model.
I ...
2
votes
0answers
21 views
Resampling to 0.5° resolution in Earth Engine
I'm trying to reproject a 500m MODIS image into 0.5° longlat for comparison with climate data. I've followed the instructions for resampling here, but I'm confused about reducing the resolution. I ...
0
votes
0answers
45 views
UTM points from CSV end up in wrong location [closed]
I have a CSV file uploaded with UTM coordinates that should be located within Botswana. However they show up in the Indian Ocean and in Nothern Europe. We have tried standardizing the crs but it still ...
0
votes
0answers
22 views
Converting “ALOS PALSAR” DEM to EGM96 vertical system using ArcGIS Desktop
I have downloaded "ALOS PALSAR" DEM from NASA's EOSDIS.
Can you help me to convert the high-res DEM to EGM96 (like SRTM data)?
I have used ArcGIS Desktop 10.7 edition but it does not work correctly.
...
2
votes
0answers
23 views
Reprojecting a shapefile Error
I am trying to write a function to reproject a vector file , by taking the original shapefile as input and giving out the name of the reprojected layer . Though when I call this function I get an ...
1
vote
0answers
37 views
Raster file not overlaying to vector layer
I'm pretty new to GIS and following a tutorial using shape files from Ithaca, NY. I've been able load a number of vector files easily enough but when I add in the .dem raster file it keeps being ...
1
vote
0answers
23 views
Clipping shapefiles with different CRS in QGIS 2 [closed]
In QGIS 2.18.22 I have to different vector-shapefiles and I would like to clip the overlay.
Unfortunately, the shapefiles did originally not have the same CRS so I saved them in the desired CRS (EPSG:...
0
votes
0answers
23 views
Synchronize Coordinate System in ArcGIS Pro
I have a map created in ArcGIS Pro ver 2, on the map the area of interest has a coordinate system of GDA94 MGA Zone 56.
On the Content Pane, the Map Grid is in MGA Zone 55 and the map content or map ...
1
vote
1answer
29 views
How to transform location data from Lamber (EPSG:31370) to GPS (EPSG:4326)?
Sorry if my way of writing is wrong, I'm a data scientist and I have little to none experience in GIS.
I would like to use an open dataset (from http://opendatastore.brussels/fr/ to be precise). It ...
1
vote
2answers
40 views
Display coordinates for a specific projection in ArcMap?
Below are the available options I can find in the settings:
How can I pick a specific projection such as Web-Mercator (EPSG:3857)?
0
votes
0answers
18 views
Overlaying Landsat 8 (raster) and shapefile using ArcMap
I would like to know what I can do correct such problem, those images are not overlaying while they have the same projection system.
I used even the extent of the shapefile to change the one for the ...
3
votes
0answers
19 views
Geoserver does not wrap GRIB raster points to coordinates where x < 0
I am new to the GeoServer and want to use it for plotting wind barbs based on a GRIB file over land data.
The wind barbs are properly created but nothing is shown on coordinates x < 0.
The map ...
0
votes
1answer
40 views
Dealing with wrong projection [closed]
I am working with some rasters that have been produced with a wrong projection.
The Spatial Reference is saved as WGS84 (EPSG:4326) but the unit are clearly in meters and not degrees. I have tried ...
0
votes
0answers
32 views
Which vertical coordinate system is used in “ALOS PALSAR”?
I'm using ArcGIS Desktop 10.7.
I have downloaded a raster file from this link.(the data is from ALOS PSAR)
when I opened the file all heights are ellipsoid, I have to convert the raster file to ...
4
votes
0answers
36 views
How to do a Lee’s Tetrahedral Conformal Projection of Antarctic/South pole on QGIS?
I want to do map of Antarctic using the Lee's Tetrahedral conformal map projection as the image below using QGIS version 3.4. Is it possible to make a custom CRS to do it? If yes, what's the ...
4
votes
1answer
61 views
Is the ESRI ArcGIS definition of California Albers projection using units of feet correct?
There is a map projection promulgated by the government of the state of California and recommended for use in certain state and municipal regulations. It is an Albers Equal Area projection with ...
1
vote
0answers
17 views
Google Earth Engine: Maintain area calculation accuracy while reducing resolution and exporting from
I am struggling to find a best practice for exporting data from Google Earth Engine at a reduced resolution for further analysis outside of GEE, while maintaining similar results analysis in the code ...
1
vote
0answers
29 views
Deciding when to use projected coordinate system (PCS) or geographic coordinate system (GCS)? [duplicate]
While I understand the technical differences between them both, I'd like an expert's breakdown of criteria to look out for that would determine when I should use a PCS or GCS.
I understand that a PCS ...
0
votes
0answers
28 views
Identifying of Vertical Datum from Metadata
I have been working with the DEM of South Carolina and I am not able to see from the metadata what is the vertical of the DEM.
How do I identify the vertical datum from the attached screenshot of ...
1
vote
1answer
22 views
Shapefile reprojection with “sf” R package doesn't work
I am using the sf R package to work with a shapefile (with a species distribution).
> sp #this is the shapefile
returns:
Simple feature collection with 1 feature and 1 field
geometry type: ...
0
votes
2answers
46 views
Projection problem
I have downloaded NCAR Community Climate System Model (CCSM) projections in shapefile format and want to look up maximum temperature. When I open it in QGIS having OSM as base map, it is shown as one ...
1
vote
0answers
27 views
Weird XY-resolution for map in ArcObjects
I have an MXD file with 240 feature-layers, all having the exact same spatial-reference and spatial resolution. I checked this using the following code:
var sortedLayers = allLayers.OfType<...
0
votes
0answers
23 views
How to convert ITRF to ITRF
ITRF 96 1998.0 epoch
X Y Z Vx(m/y) Vy(m/y) Vz(m/y)
4059623.25 2764405.93 4056720.43 -0.0079 -0.0007 0.0132
Transformation parameters from ITRF1996 to ...
1
vote
0answers
20 views
Distance Point x,i from nearest Point x,j report Point x,j ID in r
I have a sample of points villages x,i, and I want to know the distance between each village x,i and the nearest village x,j. The i, and j depicts two different samples. I am able to find the distance ...
3
votes
1answer
39 views
Buffer (for 8 points) is set at 1 kilometer but is bigger than village polygons
Other details
This is in the Philippines and I'm using WGS_1984_UTM_Zone_51N
The buffer is 1km long so it must be the map layer that is wrong
I tried the Geodesic method instead of Planar but still ...
1
vote
1answer
41 views
Spatial reference data from all layers in MXD
I have a MXD with many group which has many layers. I have tried to get coordinate system data from all layers with the code from Iterating through layers in mxd and describing coordinate system. So ...
1
vote
1answer
13 views
Mapping equirectangular square slice inside cubemap
I'm trying to map a square slice of an equirectangular image inside a cubemap with 6 faces, without distortion.
The point is that I'm dealing with huge array sizes if I try to project the whole ...
1
vote
1answer
24 views
Identify projection and set Bursa wolf params
i have a shapefile with .prj :
PROJCS["NAD_1927_UTM_Zone_17N",
GEOGCS["GCS_North_American_1927",
DATUM["D_North_American_1927",SPHEROID["Clarke_1866",6378206.4,294.9786982]],PRIMEM["Greenwich",0.0],
...
1
vote
0answers
21 views
Getting EPSG codes from Dotspatial.Projections
I have installed Dotspatial.Projections in my Visual Studio C# project. I have not found a way to get the EPSG codes.
Is there a way to do this using the Dotspatial.Projections library?
0
votes
0answers
17 views
Projecting the raster and vector to the same place [duplicate]
I have 3 groups of raster layers all in the same place, but my group with my vector layer are located above... I am working in QGIS.
They all have the same CRS WGS 84 / EPSG Greenland Polar ...
0
votes
0answers
41 views
Wrong CRS in map with QGIS [duplicate]
I have made a raster elevation map of Greenland, and have information of the region, cities and more as vectors. The information is not in the same place as my elevation map.
I have selected EPSG:...
0
votes
0answers
26 views
Projection of Ramthal, India
I'm working on a project in India and have problem with match shapefile to Google base map. I have tried different projections but couldn't find the right one.
What is the coordinate system to use in ...
0
votes
1answer
48 views
ArcGIS projected area greater than geodesic area
Question
Shouldn't the geodesic area always be greater than the planar area of a polygon?
Background
Tested in ArcMap and ArcGIS Pro, but several my polygons in a shapefile are having projected ...
1
vote
1answer
58 views
Longitude, latitude to polygon in ArcPy
I'm working in ArcGIS 10.4.1 and trying to write a script (in Python) for making a polygon shapefile from latitude/longitude.
txtFile=arcpy.GetParameterAsText(1)
shpOUTpolygon=arcpy....
8
votes
1answer
172 views
QGIS and Mapinfo reporting different projections for some files
When I open a tab file that's been generated in QGIS using EPSG 28355 (MGA 94, z55s) using QGIS 3.10 the projection is transformed to 5551
But when I open it in Mapinfo v17 it's correctly reported as ...
1
vote
0answers
26 views
Distorted H3 hexagons - even though projection is matching
Using H3-py's h3_to_geo_boundary a WKT linestring (via shapley polygons) can be generated.
When later visualizing the hexagons, why are they distorted? How can this be fixed?
To my best knowledge, ...
1
vote
0answers
32 views
Overlap of two images is switched
I try to find a way to create DEM model for two overlapping images from different sources. The upper image has transparency of 50% and as you can see they don't quite overlap correctly. The ...
