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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327 views

Manually adding spatial reference information for FEWS rainfall data using QGIS

I am trying to match rainfall data from USGS/FEWS to coordinate locations of survey households in Ethiopia, so I will need to be able to project the rainfall data. I downloaded the East Africa ...
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Map of Barcelona is on the wrong place using QGIS

I have an jpg.file with a map of Barcelona and its world file. Now the problem is, if I load it into QGIS, its definitely in the wrong place on the Basemap. I tried to change the Coordinate System to ...
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15 views

Is it possible to define a projection for QgsPointXY()

I want to use the QgsRasterCalculator via the python Plug-in in QGIS and I want to manually define the xMin, xMax, yMin and yMax coordinates and number of columns and lines in the UTM coordinates of ...
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623 views

Equatorial Scale

I have seen Equatorial Scale written along with the RF on the World Map in many Atlases, for eg., "Equatorial Scale 1:95 000 000". What does this Equatorial Scale mean and what is the significance of ...
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EEException: Image.reduceRegions: The default WGS84 projection is invalid for aggregations. Specify a scale or crs & crs_transform

I just started to learn Google Earth Engine Python API. When I am extracting the values of the points of interest, I get an error that I need to assign a projection. EEException: Image.reduceRegions: ...
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40 views

QGIS exported GeoJSON without CRS [closed]

I'm using QGIS 3.16.14 in Windows. I've downloaded nc_2020.zip, which is an ESRI shapefile. The CRS of nc_2020.prj is: PROJCS["NAD_1983_StatePlane_North_Carolina_FIPS_3200_Feet",GEOGCS[&...
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Custom projection in QGIS

I am working on an agricultural planning project in which field workers specify areas for certain uses and provide me the dimensions and locations relative to survey markers, in feet. I want to add ...
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1answer
44 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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2answers
29 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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Why is imported Layer so small? [closed]

I tried to import a layer but I have an issue that the imported layer size is so small here is the detail on the first picture that is my imported layer on the second picture that is the comparison ...
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Projection from Palestine grid to WGS1984 [closed]

I have data in Palestine grid projection (WKID 28193) and I want to convert this data to WGS 84 (WKID 4326). What is this shifting in X,Y (75,27) and how do I convert this data ?
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1answer
64 views

Getting a basemap in GDA94/MGA55

I'm working in QGIS. My project CRS is set to EPSG: 28355 (GDA94/MGA 55). Whenever I import basemaps they are automatically in EPSG: 4283 (just GDA94). When I try and change the CRS of the basemap to ...
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Reducing image resolution to sum using Google Earth Engine JavaScript API

How do I 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 dataset (...
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Converting Excel sheet of coordinates into multiple individual shapefiles

I have a CSV file with coordinates in the CRS form and want to convert each set of coordinates into a standalone shapefile (ideally with QGIS software). So far, all instructions online seem to be ...
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1answer
608 views

EPSG codes for projections to use when computing the area of global polygon sets in python env

The general answer to this question is "Use any equal area projection in units of meters that covers the world". Python code needed to make use of this is short and sweet: import geopandas as gpd ...
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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 ...
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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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200 views

arcpy selectByLocation

When I start my mxd and run this code it selects a polygon. However, if I then pan to a new location - still within the bounds of the target FC - it doesn't work. Is there some update command I need ...
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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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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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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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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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1answer
117 views

GeoJSON file content not display properly in Leaflet

I am new to Leaflet. Am facing one issue when try to display GeoJSON file in Leaflet. Issue: Actually some GeoJSON file only am facing this problem. In my knowledge coordinates are in different ...
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16 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 ...
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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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2answers
356 views

How to calculate pixel size on image of map?

I have to save to .png file with part of map from app. I've got information about PPI, easting/northing, print resolution, map scale and map coordinate system and using this information I have to ...
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1answer
60 views

Loading DEM with unkown CRS using QGIS

I am trying to load a DEM (img file + prj file) into QGIS 3.12.1 and use it as a layer over OpenStreetMap. However, I can't seem to get the CRS right, the OTF-conversion does not show the layer on the ...
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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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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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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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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 ...
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1answer
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Setting CRS of raster to EPSG 3035 using R

I am trying to set the CRS of a raster file with the following code: library(raster) r<-raster(xmn=0,xmx=10,ymn=0,ymx=10) crs(r)<-CRS("+init=epsg:3035") The warning message is: ...
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1answer
44 views

Exporting DXF in 1:1 Scale

I'm trying to export a parcel map as a DXF to scale. Initially I was having issues because my projection was set to WGS 84. I looked through the public questions on GIS StackExchange and learned that ...
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5answers
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Is there a name for the geographic coordinate 0,0?

Is there a name for the latitude/longitude pair 0,0? On a graph, (0,0) is referred to as the "origin" but I'm not sure if that term also applies to the location 0,0 in cartography.
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2answers
77 views

Use American Polyconic Projection North American Datum 1927 with GDAL and QGIS

I am trying to use modern USGS DEM data with older USGS maps. The first step, as far as I am aware, is to reproject the contemporary DEM into the same projection as the old USGS map. The old USGS map ...
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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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41 views

Creating local coordinate system in QGIS [closed]

I'm trying to make a local coordinate system using the PROJ.4 coding. I thought I had it figured out but come up with an error when trying to check parameters. Can anyone tell me what is wrong with ...
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1answer
2k views

Projection of Shapefiles for Spain (INE)

I downloaded the official shapefiles for the municipalities of Spain from INE here. It has a lot of shapefiles, but I found out that the right one for what I need is esp_muni_0109.shp. I would like ...
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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 ...
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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 ...
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2answers
5k views

What are the main drawbacks of the AuthaGraph projection?

The AuthaGraph projection has recently been hyped as the "perfect projection" for a world map, since it (approximately) conserves area, shape and distances. It also tessellates, so that any point can ...
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1answer
397 views

USGS GeoTIFF lacks projection, can't upload to Earth Engine

I downloaded some rasters from the USGS High Resolution National Hydrography Dataset Plus. In particular, I am interested in the flow accumulation images ("fac.tif" in the downloaded folders). I am ...
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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 ...
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1answer
44 views

Finding the UTM coordinates for the start point and the end point of features in a line feature class with ArcPy, 2.7.8, ArcMap 10.8

I have been trying to create a script to find the start and end UTM coordinates for a line feature class in ArcMap 10.8. The server we are using has Python 2 so my script is in Python 2. I have been ...
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1answer
53 views

Basemap misalignment between Digitalglobe Maps API to Maxar EarthWatch basemap products

The resulting of features created for Project2018 using DigitalGlobe Maps API (now decomissioned) and Project2019 using Maxar EarthWatch basemap (replacement product) are not aligned. Is anyone ...
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1answer
89 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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2answers
584 views

Exporting x,y coordinates as latitude,longitude in QGIS

I have a shapefile and I loaded it into QGIS using 'Add vector layer'. After that, I can see points in different positions. I open the Attribute table and I can see columns "X" and "Y&...
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3answers
602 views

Converting x,y coordinates (EPSG:102002) to latitude,longitude (EPSG:4326) [duplicate]

I have ranges of x and y coordinates in EPSG:102002 GRS 80 that I need to convert into EPSG:4326 WGS 84. I have tried different suggestions here and here but nothing has worked so far. I find myself ...

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