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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.

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error in making voronoy diagram in r

I try to make Voronoy diagram in latitude/longitude cooredinates. Frist of all I made grid: library(gstat) library(sp) longitude_for_data = c(32,68,89,145,176, -14, -42) latitude_for_data = c(...
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1answer
23 views

Error in mapping connections with great circles [on hold]

I am fairly new to R and to map plotting. I am trying to overlay some network information on a world map. I loaded a shapefile from Natural Earth as a large SpatialPolygonsDataFrame via readOGR. I ...
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1answer
27 views

Reprojecting with Google Earth Engine?

Link to GEEScript var L8 = L8.filterBounds(geometry).first() Map.addLayer(L8,{max:3000},'Before Reprojection') var proj = ee.Projection('EPSG:4326').getInfo() var L8r = L8.reproject(proj.crs,proj....
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Using Mapsui, how do I create a new transformation class for coordinate system read from shapefile prj file?

How do I create a new transformation class compatible with MapSui.Projections.ITransformation interface using ProjNet4GeoAPI that reads the source coordindate system from a prj file. From Mapsui ...
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Summarise rasters then project, or project then summarise?

I'm working on an analysis that involves summarising a stack of unprojected (WGS84) global 30" climate rasters (various expressions of temperature and precipitation), and generating final output in an ...
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50 views

Integrating User Defined Coordinate System into PyQGIS?

Here is my current code: #Loading of post-wrf(raster) files starts here crs = 'USER:100000' QSettings().setValue('/Projections/defaultBehaviour', 'useGlobal') QSettings().setValue('/Projections/...
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23 views

ENU to Cartesian

I have 2 points. Point A is in (lat,lon,altitude) format. Point B is in ENU format wrt point A. I know how to convert Point A to Cartesian coordinates. I also need to convert Point B to Cartesian ...
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3answers
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How to read points value hovering mouse pointer on the points in QGIS?

I am new to QGIS and learning daily, and I find it very interesting day by day. I have come up with a problem here. I stacked points on a sentinel2 image. The points data I imported from a CSV file; ...
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1answer
17 views

pyqgis reproject layer

I'm trying to find a very simple solution to reproject a vector layer into a temporary layer in pyqgis, however documentation is really extensive and I'm fairly new to pyqgis; the only answer I've ...
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1answer
20 views

Text File MultiPolygon/Polygon to PostgreSQL using Python/Psycopg2

I am writing a python script attempting to insert GeoJSON Polygon coordinates into a Postgres table. I am writing a basic insertion code since I am new to GIS domain. The code look like this: ...
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1answer
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Multiple LAS files- Define Projection [on hold]

I am looking for some help drafting code to define the coordinate system for multiple las files. I have seen plenty on how to batch define projections with rasters and shapefiles, but nothing on las ...
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1answer
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Altitude differences in different CRS

Currently I am working on a project in Kosovo. After gaining autonomy the country "invented" their own CRS, which is driving me crazy sometimes. It doesn't even have an EPSG-Code, it goes by "Kosova ...
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1answer
47 views

How to extract the coordinate system

var bands = ['B1','B2', 'B3', 'B4', 'B5', 'B6', 'B7', 'NDVI', 'BG', 'BR', 'SLOPE', 'SRTM', 'NDWI']; var trainingTesting = withLayers.select(bands).sampleRegions({ collection: new_merge, properties:...
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1answer
34 views

Create custom coordinate system

I have the following info from a data provider and need to create a custom coordinate system using these parameters. The end goals is to map a file in this coordinate system against other data sources ...
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37 views

Error in reproject vector file using GeoPandas

I have a vector file (in this case shp file) and I read it with GeoPandas (gpd). vector_folder = r'C:\poly' vector_file = 'poly.shp' df = gpd.read_file(os.path.join(vector_folder,vector_file)) df ...
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1answer
29 views

Customizing Projected Coordinate System

My area of interest is between UTM zone 22 and 23. I'm struggling in create a custom projection, so: Can I create a custom UTM projection, would be this the minimum distortion? I did not understand ...
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30 views

Transverse Mercator (TM) to Universal Transverse Mercator (UTM) [closed]

I am a new to QGIS. How can I convert a Transverse Mercator (TM) raster image to Universal Transverse Mercator (UTM)? The raster file that I used has a projection: Transverse Mercator (TM); WGS-84;...
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Name of a custom Goode homolosine projection

What is the specific name of this homolosine projection? I see that America is closer to Europe/Africa than in the typical homolosine.
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25 views

Converting L.GeoJSON Leaflet to different projection?

so I have some awesome basemap raster layers that use L.TileLayer to load, but the GeoJSON I have for my country polygons is all Web Mercator. My tile map is WGS84 or EPSG4326 (I think). But I ...
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1answer
30 views

In ArcMap batch processing model outputs different coordinate system and datum

I've made a simple model that takes a CSV of lat/longs with radio signal levels, makes an XY event layer, selects values over -120, then converts to raster. In the Make XY Event layer the spatial ...
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19 views

GeoTools support for Goode Homolosine (SR-ORG: 7619) [closed]

I'm currently trying to implement a project in Google Earth Engine which has many input datasets in the Goode Homolosine projection. When I try to upload these as assets into GEE, an error is given ...
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25 views

QGIS: How to set coordinate unit using google satellite xyz-Tile?

I'd be glad if someone can help me with this. So, what I want to do is quite basic: Digitalizing shapes with google satellite image using QGIS. For that I am using the Google satellite-xyz-Tile. ...
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53 views

Extent of shapefile in meters instead of decimal degrees QGIS

i'd be thankful for your help. My QGIS-project has the CRS WGS 84 EPSG 4326 and so does the shapefile I created. The coordinates on the edge of the window however shows, I think, meters, although I ...
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1answer
29 views

R leaflet plot with ETRS89

I am new to GIS and R leaflet, and I am trying to plot the starting points of protected rivers in Spain. Example of coordinates from the original file: Nombre.de.los.cauces.principales Coordenada.X....
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1answer
40 views

Which coordinate system/ projection would you use to measure lines globally distributed?

Which geographic coordinate system /projection would you recommend to measure the length of hundreds of lines which are globally distributed (southern and northern hemisphere)? The lines have a length ...
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arcpy.Project_management - different results from python shell and python command line

I am trying to transform a number of shapefiles by script using a self-defined custom transformation. When I transform the shapefile using my script in the python shell of the ArcGis GUI everything ...
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1answer
94 views

Setting correct UTM zone

I am using QGIS for mapping a series of buildings, I got the UTM coordinates from Google Maps and imported them as a delimited text layer. However when I search for the UTM Zone that I need it doesn'...
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2answers
46 views

Pixel depth and raster output won't align with the original

The problem Need to convert a raster .tif tile (DOWNLOAD) from WGS84 to GDA94 Albers; Need to convert its stored pixel info from Float32 to 8 bit UNSIGNED; Need Compression set to "NONE"; Need to ...
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1answer
63 views

Can ArcMap open shapefiles made by QGIS?

I have created many EPSG shapefiles in QGIS and would like to import them into ArcMap for analyzing. Can ArcMap open shapefiles made using QGIS?
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1answer
39 views

Applying coordinate systems and projections to unprojected images

I have a folder with many unprojected images (i.e. LocX_1_LocY_1.tiff to LocX_32_LocY_32.tiff) which have a naming convention that is associated with a text file that has surveyed locations of the ...
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1answer
24 views

Measuring distance between features in linear units from vast layer in geographic coordinates in gdal

I have a point layer for a large area. The layer is in a geographic coordinate system. I need to make some distance-aware work with features from this layer. Actually, I need to build a buffer-layer ...
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1answer
35 views

Importing CAD into ArcGIS Pro? [closed]

I am trying to import CAD files to ArcGIS Pro. I set my basemap and used the add data button to add polylines, polygons, points and annotation to ArcGIS Pro from a CAD drawing. It imported all the ...
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1answer
39 views

Treating latitude/longitude as a pair of polar coordinates

I have latitude longitude coordinates covering the whole globe that I wish to perform arithmetic operations (mean, interpolation) on without concern for ambiguous points and wrap around and without ...
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1answer
29 views

Geographic coordinate change

I am using ArcMap 10.4 and I want to convert my layer of Athens (http://geodata.gov.gr/dataset/api0unon-o1kodou1kwv-tetpaywvwv-anuou-a0nvaiwv/resource/d2e17dd6-8e1e-4c34-9111-fb3ac1bc9da4) ...
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1answer
38 views

Creating Peirce quincuncial map in QGIS? [duplicate]

I would like to create a Peirce quincuncial projection of vector data using QGIS. A similar question was asked here several years ago, without apparent satisfactory answer. Someone offered a link to ...
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21 views

Georeference System Conversion

Please suggest me the appropriate Georeference system for QGIS 3.4 (MAC OS) for the following GPS User Grid System conversion: M E Indian Bangladesh 037 +8.606550e+02 +2.836137e-05 +289 +734 +257 ...
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How to read slope from HYDRO1k database for Asia

The Hydro1k database for Asia is provided by USGS. It is available here as GTOPO30 HYDRO 1K. I tried to read the slope values for the Kumamoto area in Japan but the results all came out as 55537(same ...
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1answer
43 views

I can't find CRS EPSG 27700 in version 3.6.0

I have tried to use the filter element in the Project properties menu to find EPSG 27700 with no success. Any suggestions please for converting to British National Grid
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0answers
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Altered projection in Google Earth Engine, how to correct?

When I create a collection (named here geeCol) using Google Earth Engine, the projection displayed by geeCol.first().projection().getInfo() returns: {'type': 'Projection', 'crs': 'EPSG:4326', '...
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0answers
32 views

Estimating a Rotated Pole given a gridded dataset with lat/lons at each point

I have netcdf dataset that I think is regular gridded dataset using a Rotated pole mapping, but the rotated pole information is wrong. For those not familiar with Rotated Poles, the cartopy ...
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17 views

Failed to load ArcGIS JS API satellite map with polar projection

I am trying to draw satellite map with polar (Arctic) projection using ArcGIS JS API. Firstly I load default (Mercator) satellite map and it works fine. Then I change map spatialReference to polar the ...
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0answers
22 views

OMI data projection not lining up with WGS84

I am using data from Aura's OMI of global NO2. I need to compare values of NO2 measurements from OMI with measurements from ground based stations, for which the pixel location needs to be matching ...
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0answers
31 views

Sentinel 2 imagery does not align with Landsat imagery regardless of coordinate system

I have downloaded Sentinel 2 imagery of Antarctica and imported it into a QGIS project that also contains older Landsat imagery, line vectors, and a basic basemap. The Sentinel 2 imagery was ...
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1answer
28 views

How can I determine the original spatial reference system of GML coordinates when I have their WGS84 equivalent but no EPSG?

I am querying out spatial information from a SQL database that stores locations that users input on a map as GML snippets. See below for an example: <gml:Point xmlns:gml="http://www.opengis.net/...
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24 views

ENU to rolled pitched yawed coordinate transform

I'm trying to figure out the correct way to perform a certain coordinate transformation, and I think the best way to describe it is with an analogy. Imagine a tank has rolled up the side of a hill and ...
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1answer
45 views

USA map projection

I know that this issues has been discussed, and I indeed find information on this forum and try the suggestions out. It is about the projection of the USA map shapefile in QGIS. I downloaded the ...
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0answers
29 views

Projection of set of point on a line with chainage

I am new to QGIS and in fact new to GIS mapping as whole. I have a line in shp format (which does not have chainage & I want to add chainage added to it). Chainage is the distance from the ...
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1answer
38 views

Bessel ellipsoid definition for LV95 (EPSG:2056)

I recently wrote some code to transform coordinates between WGS 84 and the new Swiss projected coordinate system (LV95 / EPSG:2056). While doing that, I tried to find an authoritative source for the ...
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0answers
10 views

Extract coordinate system from inset in Geospatial PDF

I have a Geospatial PDF (actually a GeoPDF) that has an inset. I can extract the coordinate system with gdal but gdal only returns the main chart information. Is there a way to find the inset ...
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1answer
28 views

CRS of QGIS CAD tool and measure line tool

Does any one know what CRS the QGIS digitizing toolbox (CAD tool) and the measure line tool use? Because I couldn't find any way to manually set the CRS for the tools in QGIS 3, my assumption is ...