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.

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83 views

What is the coordinate system?

I am basic user of GIS. I have a project in Rwanda and have received CAD information in a coordinate system I am unaware of. In addition this isn't the first time I have come across similar references ...
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Changing the Map Projection of a DEM File using gdalwarp?

I have downloaded the moons dem from: https://astrogeology.usgs.gov/search/details/Moon/LRO/LOLA/Lunar_LRO_LOLA_Global_LDEM_118m_Mar2014/cub I want to change the projection to create a new ...
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103 views

Shifting poles in QGIS

I'm looking for a method to shift the poles vertically in Mollweide projection using QGIS 3. I have come across this website and I want to do something similar. This is the default view of the ...
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Auto-generate Grid Reference for Point and Polygon features within existing Shapefile, QGIS

I have various point and polygon layers (shapefiles) which I use regularly in QGIS (3.6.3), and often need to work out their location as an 8 figure grid reference (British co-ordinates, EPSG-code ...
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What is the meaning of “SI-D-48-Gauss_Kruger” projection used in an ESRI WKT string?

Recently I encountered the following WKT CRS definition from an ArcMap project: PROJCS["SI-D-48-Gauss_Kruger",GEOGCS["GCS_Bessel_1841",DATUM["D_Bessel_1841",SPHEROID["Bessel_1841",6377397.155,299....
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How to reproject raster image from WGS84/Pseudo-Mercator to ECEF to ENU in python? [closed]

I am new to GIS and I am writing a program that should work with a cartesian coordinate system, ENU. Therefore my plan is convert all point coordinates from WGS84/Pseudo-Mercator to ECEF and then to ...
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41 views

Draw a polygon from the mentioned data

I want to draw a polygon from the below JSON data from a GeoJSON file. However I am confused about the coordinates array since I believed they corresponded to a latitude and a longitude. But clearly ...
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List of available transformations between two coordinates system in epsg using geotools

How we can have the list of available transformation between two coordinate systems using geotools? e.g. the list provided of epsg.io between EPSG:32066 and EPSG:4326 https://epsg.io/32066 Java ...
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48 views

Keep raster data in original projection and just display it using a new transformation (at the poles) in R vs ArcMap

Desired output: Raster with original characteristics but in transformed projection using R (I.e. See second paragraph here.). NB, I need to do this for 100s of different rasters. You can achieve this ...
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Choosing CRS for Chicago, Illinois

I have data for Chicago, Illinois, that is in WGS84 CRS. I need to convert it to a metric projected CRS, and I've found several possible options: EPSG 3528 EPSG 6454 EPSG 2790 EPSG 26971 Among these,...
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Print functions for data projection and rename file

I have been struggling with functions in this script as I would like to see the projection in the file and then rename. The problem is that it causes and definitions are not done properly Here is the ...
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OpenLayers 4: Load baselayer outside projection extent

I have a map that uses EPSG:3912. Then I have base layer from CartoDB. When I zoom out I see: My question is, if it's possible to have CartoDB layer loaded outside map extent (so that it fills white ...
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Figure out which coordinate system being used

I'm working in a project that have no documentation and I'm trying to figure out which coordinate system is being used in their API. What I know is that they have a coordinate like this: latitude: -...
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Error User-defined methods must return a value - what should my function return?

I have written a function that supppose to reproject my sentinel 1 image (Resolution 10 meters) to my sentinel 2 images (20 meters). I have written the function but I am missing the return part ...
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1answer
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Incorrect Extent when importing images into ArcMap 10.7

I have 2 JPG images of the same pixel size and of the same square mile area, with identical JGW and aux.xml files. One displays correctly, the second does not. I am stumped, and it seems that ESRI ...
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Georeferencing NASA, NOAA, and Natural Earth Projections in QGIS

I'm new to QGIS. I'm currently using the newest version-- 3.10. I downloaded a raster projection (a tiff file) and vector data (SHP files of coastlines and rivers) from Natural Earth I to import as ...
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Finding geographic coordinates of shapefile using ArcPy with ArcMap

I want my Python script to check if the first coordinate in a GeoJSON polygon is within a polygon in ArcMap, and if so draw the polygon to a featureclass. My issue is that the GeoJSON file is using ...
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32 views

Reproject image collection according to the projection of another image collection

I have two image colelctions. one of sentinel 1 and one of sentinel 2. I want to reproject the sentinel 1 so its' projection and cell size would be like the sentunel 2 images. It worked for me when I ...
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Projection of TRMM in dictionary

I am trying to extract the 24 hour precipitation data of a given polygon by creating a dictionary . I have gotten results but i'm not sure if the parameters I have inserted in the reducer are correct. ...
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Why extract returns NAs on the boundary when polygons exactly overlap with the rasters in R?

I'm new to GIS and English is not my first language, so apologies for anything inappropriate. I'm trying to use extract() to get mean values of rasters inside polygons. One of the R codes I used are ...
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Creating a buffer around line segments in QGIS [duplicate]

I am trying to create buffers around a shapefile of rivers, the shapefile consists of line segments. I am trying to create a 5,25, 75, 100-meter buffer around the lines using the multi-distance buffer....
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CRS error working with Solaris [closed]

result_polys = sol.vector.polygon.georegister_px_df(mask2poly, affine_obj=tile_tfm, crs= 'epsg:4326') ...
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Identifying unknown coordinates/coordinate system

I have a set of data for the country of Chile which has geospatial information in the form of 'XX0000X' where X is a letter and 0 is a number. I have not been able to figure out what these coordinates ...
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How to have the same scale for two maps? [closed]

I'm using QGIS 2.8.1. I have one raster map with rainfall data with 1:3 scale when zoomed to layer. There's another vector map with points which in scale 1:221,691 when zoomed to layer. Both are ...
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Trying to create a Cartogram and the st_transform function does not work

I'm following a tutorial to create a cartogram and the line to do so creates an error, as does the solution to fix the error which is to transform the data using st_transform(). I've looked online for ...
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Calculating XY from Depth, Azimuth, Inclination using Python

I have been using the answer from here and trying to see what I am doing wrong, but just don't see anything. dMD = D2 - D1 B = acos(cos(I2 - I1) - (sin(I1)*sin(I2)*(1-cos(A2-A1)))) RF = 2 / B * tan(...
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90 angle between coordinate breaks when applied to world

I have a point A and direction DIR and a distant DIST Let's use A: `longitude: 139.33435143, latitude: 35.5385006, altitude: 0` DIR : `longitude: 139.33547146, latitude: 35.54034106, altitude: 0` ...
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110 views

How can I convert the Gaussian coordinates( Gauß-Krüger) to the WGS84 coordinates

I have a list of WGS84 and Gauss coordinates, but how to convert another WGS84 coordinates. I want to use PROJ for conversion. What is PROJ string like? | Name | x | y | H | ...
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35 views

QuickOSM query (in QGIS) appearing in the wrong place. Maybe CRS Problem? [duplicate]

I had a question in QGIS Buffer distance vs Distance in Distance Matrix which in turn made me to change my project CRS from EPSG: 3857 to EPSG: 25832. My project location is in the middle of Germany ...
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Creating custom proj4 string from components

I'm trying to work with NOAA's NDFD weather data, which are released as rasters in GRIB format. Specifically, I'm currently trying to get the pixels that intersect an arbitrary geometry. Information ...
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Custom PROJ CRS for shifted, rotated, and skewed axes?

It is possible to create a custom PROJ definition for a cartesian CRS with shifted, rotated, and skewed axes? For example: Where The x-axis is formed by the line AC, the y-axis by the line AB, and ...
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QGIS 3.10.1 shapefile layer and imported aerial are not matching up

I am having trouble matching up the shapefile Annex downloaded from the City of Bellevue, WA GIS page and the Google satellite imagery loaded as an XYZ Tile layer from the URL https://mt1.google.com/...
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Using python GDAL to reproject an HDF

I am working with MODIS data (MOD14) and I only need the fire mask, which is the first dataset. The problem is that MODIS data in the sinusoidal projection and I need to reproject into something else....
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ArcGIS Online and Nearmap Basemap Imagery

I am trying to get an exported Nearmap imagery as my basemap for an ArcGIS Online map. I have the Nearmap Image and it's respective georeference file (JPG File and JGW File). Is there a way to upload ...
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ArcGIS Online producing isochrones which are skewed North-South, is there a way to fix this?

I am trying to run an isochrone analysis in ArcGIS Online using Analysis > Use Proximity > Create Drive-Time Areas. The resulting polygons are stretched North-South, I suspect this is due to ...
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What epoch does Proj4 for EPSG:4326 assume? NMEA stream provides Lat Lon at measurement epoch

I get a NMEA stream exported from Applanix PosPac in the epoch the measurements took place (2019). These coordinates go into a software, that interprets the NMEA Lat Lon as EPSG:4326 with Proj4 ...
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QGIS: creating user defined CRS from local CRS - tutorial?

Is there any tutorial or at least a list of commands on how to create a user defined CRS in QGIS from local coordinates so I can switch between projections in more or less laymans terms? Specificly I ...
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185 views

Layers misaligned in QGIS

I have two National Imagery Transmission Format Standard (NITF) files loaded into QGIS 3.10 and they should be the same coordinate system but for some reason I cannot figure why they are not aligned. ...
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Raster projection is inverted Python-GDAL

I am carrying out a program that, based on the data from weather stations, performs an interpolation and generates a georeferenced raster with these data. The program works well interpolating and ...
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32 views

MapInfo Custom Projection to PROJ4

Just getting into QGIS and coming from MapInfo. I have some custom projections that I would like transferred. I've been trying to figure out the parameters today without any luck. I have the following ...
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Resolving coordinate systems in AutoCAD and ArcMap

I have been correcting geological maps using Bing imagery in AutoCAD. The imagery is good enough to see the features. I want to transpose to ArcMap to access good topographic information. I'm having ...
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Publishing EPSG:3857 raster in GeoServer

I have two sets of services, the first one is taking a satellite product and generating a GeoTIFF to be published in GeoServer via the second service. The code for the first service is written in ...
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gdalinfo returns PROJCS[“unnamed”] but QGIS returns the correct projection

I'm trying to understand why my gdalinfo call to a specific file returns "unnamed" for the PROJCS node. The call looks like this: ./gdalinfo /path/to/file/dem.tif. Output (notice the "unnamed"): ...
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Is it necessary to use projected coordinate system for sf (function: st_nearest_feature) package? [closed]

I have two csv files, each with lat/long coordinates. I converted them into sf objects, giving each GCS (geographic coordinate system) crs. When I use the st_nearest_feature function, I get this ...
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XYZ tiles not projecting correctly

I have set my CRS to NAD_1983_StatePlane_Arizona_Central_FIPS_0202_Feet (ESRI:102649), the same CRS as my points. When I add the XYZ tile for Google_Imagery_Hybrid it prompts me to choose a ...
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1answer
35 views

Regarding NAD83 versus WGS84

What might be the discrepancy for a survey line originally projected in NAD83 over 500 metres if the high precision GPS unit is using a WGS84 projection? Is there a possible also a cumulative error ...
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Basin shapefile into HEC-HMS coordinate system issue

I am trying to import a basin shapefile into HEC-HMS without going through with the whole HEC-GeoHMS process in an attempt to use HEC-HMS to calculate PMP values for the drainage area. I make a new ...
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1answer
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Reproject in QGIS doesn't work the way like in ArcGIS [closed]

Sometimes I get polygon data that digitizes buildings, but they are slightly displaced like in the following example However, when I use the ArcGIS Tool "Project" to project the layer from a ...
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1answer
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Storing Central European data, which SRS/which data type?

I am creating a PostGIS 2.X data base to store some 500 or so sites as points in it, which are distributed in the northeastern part of Germany, northern Poland and parts of the southern Baltic coast. ...
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Matching X and Y axis coordinates of two GeoPandas geometries to overlay them

I have two GeoPandas GeoDataFrame objects with their corresponding geometry columns. GeoDataFrame 1: counties --> has polygons and multipolygons of Dominican Republic counties. The source data was ...