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.

Filter by
Sorted by
Tagged with
0
votes
0answers
25 views

QGIS - Large offset between two identical vector layers

I want to have a dxf layer to overlay another layer. The dxf layer is already saved to a shapefile with the needed crs. The layer has a large offset and nothing happens when I set the crs to the ...
1
vote
0answers
24 views

Convert Geo Coordinates System X/Y to lat &lon from netCDF4 file using python 3

I have netcdf4 file with some variables like: Geo Coordinates System X/Y. I need to convert it to lat/lon. How can i do that with python? This information from my netCDF4 file: import numpy as ...
5
votes
1answer
125 views

CRS interpretation in QGIS?

I know there are related questions like this one, this question, and this one all over this site. I have tried the many possible solutions I have seen at the point. The problem: I am trying to make a ...
0
votes
1answer
30 views

Remove polygons having less than 4 coordinates in R

I have a multiPolygon shapefile of buildings in a particular city. I read it in with readOGR and and transform it to my desired planar projection with the following code: buildings_data<-readOGR("...
0
votes
0answers
18 views

Error in RGEOSDistanceFunc(spgeom1, spgeom2, byid, “rgeos_distance”) : negative length vectors are not allowed

What does the error in the title mean? I'm fairly new to GIS and can't understand which negative length vectors R is talking about? Here is what I'm doing: I have a csv of lat/long locations of ...
0
votes
0answers
17 views

Image not Aligning in Google Earth Engine?

A raster dataset in Earth Engine is not aligning properly to the continent. However, a different raster from the same project database does align properly. This is causing issues for down-stream ...
0
votes
1answer
38 views

Reprojecting data with GeoPandas using 'to_crs'?

I am trying to reproject a polygon so that it has the same projection than a raster dataset. raster.crs CRS({'proj': 'tmerc', 'lat_0': 0, 'lon_0': -183, 'k': 0.9996, 'x_0': 500000, 'y_0': 0, 'datum': ...
0
votes
1answer
12 views

Issue with Projections from WGS1984 to GCS_Amersfoort

I am using ArcGIS 10.6.1. I have data from TOP10NL that displays the road network shapefile, and I have the busline shapefile from openOV. The TOP10NL data is in GCS_Amersfoort, the coordinate system ...
0
votes
0answers
22 views

Transforming Alaska and Hawaii to be next to USA with TurfJS?

I'm working on an app that contains a map; right now, the map just includes the Continental US, but it would be great if Alaska and Hawaii could be included as well. So far, I've found shapefiles ...
0
votes
1answer
30 views

All layers in ArcMap lined up, but when exported to CAD, they shifted to different locations

I have all the layers in ArcMap lined up correctly, but they shifted in CAD after I exported them. Why is it? The data frame property shows current coordinate system: Current coordinate system: ...
3
votes
1answer
70 views

PostGIS ST_Transform results shifted by about 25 metres

I have a road network downloaded from OSM and imported into PostGIS with pgrouting. I convert it with a specific local EPSG ST_Transform(geom, 26717), but the result is shifted about 20 metres to the ...
0
votes
0answers
19 views

Georeferencing scanned map with vertical datum contours? [on hold]

I have a scanned map of groundwater level contours with NAVD 88 elevation data. Is it possible to digitize this in ArcGIS Desktop 10.6 or later with a vertical datum? I don't see an option for ...
1
vote
1answer
67 views

Identifying Lithuanian coordinate system?

I am trying to make sense of geodata which uses coordinates like the following: (574457.93, 6058460.22)–(574382.72, 6055752.97) These should be located just west of Vilnius, Lithuania. 54.642587, 25....
1
vote
1answer
21 views

ESRI ArcMap ArcObjects C#: Project geometry with user defined transformation

I have routines which project geometries from the projectedCS DHDN_GK_3 to projectedCS ETRS89_32N using the available predefined ESRI Transformation esriSRGeoTransformationType....
1
vote
1answer
29 views

Shape area in not adding up

So I'm trying to get the area of a buffer zone with a 50 meter buffer zone in ArcMap 10.6.1. Ideally, this would be 7853.98 meters, but when I check the Shape_Area (by using Project to change the ...
0
votes
0answers
22 views

Coordinate system problem; two features won't match up (linear units problem?) [duplicate]

I have two features that should overlay, both are shape files and one is polygons and one is polyline. The line should essentially outline a specific region in the polygons, but they are completely ...
3
votes
1answer
64 views

Handling projections with QGIS?

I know this may sound like a silly question, and it is, but I've read lots of questions and tutorials, watched a few videos and still can't properly understand what I should do... I am trying to work ...
0
votes
0answers
16 views

ArcGIS Pro Creating Map Tile Package with Spatial Reference

I am trying to create a Map Tile Package from a map I put together for use with Survey123. I have previously created a survey for use with collecting data in the field. I'm trying to create a base map ...
1
vote
1answer
33 views

Change units from degrees to meters in QGIS 3.6 [duplicate]

I'm cleaning up shapefiles (mainly for US areas) in QGIS 3.6 to import into other CAD environments such as Rhino. One problem encountered is that the units are in degrees, resulting in imports being ...
0
votes
1answer
32 views

Offset in GeoTIFF coordinates Google Earth Engine extracts

I download a certain geographic location (lon,lat) with buffer radius around for MODIS products, such as MCD43A2/MCD43A4 from Google Earth Engine using ee, such as: lon = 10.452175 lat = 51.079206 ...
1
vote
0answers
23 views

World Mercator Projection with Chucotka region in right part? [duplicate]

How can I choose or modify World Mercator projection to display eastern part of Chucotka region in the right part of the map? I have already tried to change the parametr +lon_0, but the map looks like ...
7
votes
1answer
117 views

Difference between scale and grid in QGIS?

I am new in QGIS, and I can't quite figure out how grid and scale work. Should my "Project CRS" and my "Grid CRS" be the same or not? I played around with settings and after some time and managed to ...
0
votes
0answers
30 views

Geodetic buffer [closed]

I have imorted a csv file to QGIS resulting in a point layer containg data from all over the world. The point layer is in degrees. Now, I would like to reproject the layer to meters, but I am not sure ...
1
vote
0answers
23 views

How do I convert IGb08 coordinates into an ECEF frame?

I'm relatively new at GPS positioning, and have come across precise orbital calculation files here. I've parsed the sp3 files and gotten the values into something I can work with, but I don't know ...
1
vote
1answer
80 views

Why is there a difference in length for two lines created from the same points, one with ArcGIS Pro and the other with Geopandas? [closed]

Update Question off-topic because I launched the ArcGIS treatment again and for an unknown reason this time I obtained the 21.56km length I was expecting. It means the error comes from either my ...
-2
votes
0answers
34 views

Reprojecting raster from UTM to latitude/longitude in R? [duplicate]

I have two rasters. The first is projected in latitude/longitude The second in Lambert. So, I would like to reproject the raster in Lambert projection to latitude/longitude using R. How can I do ...
1
vote
1answer
51 views

Missing window in QGIS 3.4.9 Madeira

I am working with the latest stable version QGIS 3.4.9 Madeira. Unfortunately, I cannot find the window relating to projected coordinate system properties (see the picture), so I cannot change the ...
0
votes
0answers
10 views

XY coordinates not lining up with shapefile on ArcGIS Desktop? [duplicate]

I think this is an issue that has been dealt with several times but I am unable to figure out help on my own based on the previous support here. My X,Y points are not overlayed on the map. I have set ...
0
votes
0answers
24 views

Locations mapping looks off in ArcMap? [duplicate]

I want to upload a csv file with co-ordinates. The locations belong to USA. So I Upload a csv file to ArcMap and add XY data. The Projected Coordinate System is WGS_1984_World_Mercator. As soon as I ...
0
votes
1answer
24 views

Error using gdalwarp

I have this NetCDF file of the Greenland ice sheet velocities but the coordinate system is NSIDC Sea Ice Polar Stereographic North (y: -655750 to -3355750 and x: -639750 to 855750 meters). I wanted to ...
2
votes
1answer
38 views

Converting coordinates from a local coordinate reference system

I am trying to define a local CRS in R based on the information in the screenshot image below My R code is as follows: I define the local CRS from the screenshot image I apply it to my dummy ...
1
vote
0answers
26 views

Converting coordinates using NCO/CDO

I have a NetCDF file of ice velocities of the Greenland ice sheet but they are in polar stereographic coordinates (y: -655750 to -3355750 and x: -639750 to 855750 meters). I am wondering if there ...
2
votes
1answer
44 views

Converting Lat Long CSV file to meters using ArcGIS Desktop?

I have a large file in a CSV or excel format and want to convert the Lat longs into Northings and Eastings in order to then put them into ArcGIS Desktop and convert those Northings and Eastings into a ...
-1
votes
0answers
21 views

The mathematics and algorithm behind converting between UTM (Northing, Easting) and Lat and Lon [duplicate]

I know there are a lot of tools and software for this. But for my own knowledge, I wanted to ask what is the general procedure behind the conversion (i.e a pseudo-code).
2
votes
1answer
22 views

Converting polar stereographic to lat/lon using ArcGIS Desktop?

I have a netcdf file of the Greenland ice sheet which I have uploaded in ArcGIS Desktop as a raster file. The projection is WGS84 NSIDC Sea Ice Polar Stereographic North but the units are in meters (...
-1
votes
1answer
50 views

Converting Northing and Easting to Lat and lon using QGIS

I have a shapefile and I want to export it to a CSV file, with the difference, that I want it to have Lat and Lon instead or in addition to the easting and northing columns. I've tried changing the ...
-1
votes
0answers
25 views

Calculating area of each pixel in raster using ArcGIS Pro?

I have a raster and I don't know if I can trust the projection to have the same area in the whole map. Is there a way to create a new raster or raster layer that has the area of each pixel or to turn ...
1
vote
0answers
33 views

Reproject tool working in QGIS?

I am using QGIS 3.4.8. I'm working on a project and the projection is in EPSG:2772-NAD83(HARN)/Colorado North and the Ellipsoid is GRS 1980(IUGG,1980). I received a some new shapefiles for the ...
2
votes
1answer
62 views

How to use a specific transformation for a coordinate projection with Python

I try to use Python to project single coordinates from Gauß-Krueger-coordinate system (EPSG:31467) to ETRS89-UTM (EPSG:25832). I'm using the way Antonio Falciano showed here. So my script looks like ...
1
vote
1answer
37 views

Calculate Coordinates on the Beeline between two Coordinates on a Spheroid/Ellipsoid (Earth)

I have two coordinates of locations on the earth and want to calculate points in between these two coordinates on the Beeline, for example the coordinate in the middle or at 10%. I am able to do this ...
1
vote
0answers
40 views

Calculating latitude and longitude fields using PostGIS? [duplicate]

I have a shape in PostGIS that has 2,658,061 records (points). I need to create a field that is called "Latitude" and another that is called "longitude" and calculate a position in WGS84 (SRID: 4326)...
1
vote
1answer
26 views

Use custom Transverse Mercator projection for poles

Due to some reason (internal storage system), I want to define a custom Transverse Mercator projection for some parts of the world where the origin is nearby an area of interest. But I also need to ...
0
votes
0answers
26 views

Georeference an unreferenced image using rasterio in Python

I have unregistered/unreferenced 6 band TIFF images that I have been trying to export as georeferenced GeoTIFFs. The GPS coordinates of the corners of each image is known and each image is 1024 height ...
1
vote
0answers
20 views

QGIS 3.6 QUICKOSM buildings query CRS with metre untis to create buffer

Using QGIS 3.6.2 I'm running a QUICKOSM query to find residential buildings in Scotland. I want to then put a buffer around them. The query is fine, if a little slow. The only CRS I can get to ...
1
vote
1answer
43 views

How can I stop the QGIS project projection from changing

I am using QGIS version 2.18 (I know newer versions are available, but I would like to try and fix this!) and have a problem with the projection changing unexpectedly. I would like to use OSGB 1936 /...
2
votes
1answer
56 views

Banding appears when reprojecting shapefiles using R?

I have downloaded a shape file (Marine Ecoregions (last one on the page)) from the nature conservancy http://maps.tnc.org/gis_data.html I am then using R and the sf package to project this shapefile. ...
1
vote
0answers
15 views

GeoGraphicLib and custom forward

I need to project data which can be nearby the poles, and I want to use a custom transverse mercator projection for a number of reasons. Using GeographicLib (either TransverseMercator or ...
2
votes
0answers
18 views

Setting CRS for SCP within QGIS?

I am currently working with SCP within QGIS and am trying to classify the contents of a field (different flowers, grasses, bare ground etc.). I have loaded a raster image of my field and am now ...
0
votes
0answers
38 views

Duplicate layer, but in different CRS? [duplicate]

I inherited some data that lines up correctly on the map, but in face are in different coordinate reference systems/SRID. Here is a screenshot example: The CRS of the green layer is: EPSG: 4326 ...
3
votes
1answer
65 views

Setting CRS : TypeError: 'NoneType' object is not callable [closed]

I'm working with a naive geometry column imported from a csv file, like this: name geometry id 1 Abubilla (POLYGON ((424405.897979997 ...