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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72 views

Plotting points using AusMap plugin QGIS v3?

I am trying to plot infrastructure points from the AusMap plugin but it does not align with my current CRS. The points are in GDA2020 - when I change my basemap to this it still does not align. I am ...
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Using elevatr and apply function

I'm trying to use the "apply" function with the R "eleavatr" package. I'm getting an error message but I'm not sure if the problem is in my understanding of the apply function (perhaps the root of the ...
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Why do zones differ for WGS84 UTM in Google Earth Pro vs. in QGIS 3.4?

For example, zone UTM zone 12S in Google Earth Pro contains southern UT and AZ... while in QGIS, zone 12S appears to be in the southern hemisphere. Probably a ridiculous question, but not quite sure ...
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Sentinel2 : coordinate system of band shows none jp2 in python

I am using python 3.7. I have downloaded sentinel2 images using sentinelsat python API. I have used geojsonfile multipolygon as footprint with coordinate reference system, EPSG:32632. I am currently ...
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In which format am I working and how can I plot it correctly on GIS?

I've been working recently replicating this paper: "Constructing Street Networks from GPS trajectories". They got a repository with the implemented code. Anyway, the issue is that their data is in the ...
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DWG reprojecton

I`ve tried to reproject a DWG file from NAD83CSRS/17N to WGS84/Latlong as follows Create a new DWG Assigning the target coordinate system to the new DWG Attach original drawing Query all objects from ...
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Identifying coordinate system

I have come across a northing and easting type of system that I can not identify or convert. It seems like UTM but is not. This is an example of a coordinate that I have: N4738272.047 E712167.899 ...
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28 views

What are the units for MapPoint M value with spatial reference WGS 84? [closed]

Is this something I can convert to miles or meters? What is the equation?
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63 views

Making meridians converge to both poles?

def transformx(lon, lat): x = lon*(90-lat)/90 y = lat return x, y What is the formula to make the meridians converge to both poles like the picture attached?
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Display NSIDC arctic ice extent using PolarMap.js?

I'm a newbie in GIS. I've built a map of an expedition across the arctic region, but right now the trek is displayed across the ocean. To fix this, I've tried to integrate ice extent shapefiles from ...
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177 views

QGIS 3.6.1 problems with CRS

After I have created a new QGIS project, the project CRS is set automatically to WGS84 (EPSG:4326 - WGS 84 - Geographic). The layer (.shp) which I loaded to the project has already a predefined CRS (...
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To project, or not to project? Extracting raster values with R

I have a raster from which I need to extract values at point locations using raster::extract(raster_stack, points_sf). The raster is at 30 arc-second resolution and came from WorldClim with ...
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857 views

Why do I get error “Runtime: b'no arguments in initialization list'” when running to_crs?

I have a geopandas dataframe that has POINT geometry in NAD83. I want to use to_crs to change them to espg: 4326. When I first bring in the feature class as a gpd dataframe, it shows no crs, so I use ...
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123 views

QGIS NTv2_SN.gsb

I want to integrate the NTv2_SN.gsb grid in QIGS. I have a dataset in CRS 3149 and want to transform into CRS 2588. Therefor I want to integrate the NTv2_SN.gsb into QGIS. But I have some problems. I ...
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How can I calculate point's coordinates based on bounding box and tap click on phone screen? [closed]

E.g. I have bounding box [94818.24, 116189.125] [94818.914, 116189.8] and point's coordinate on my screen [695, 1082]. So how can I get a coordinate in CRS=EPSG:99781
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1answer
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Flipping coordinates in projection results in distortion. A simple mistake

Edit: I made an embarrassing rookie mistake late at night (excuses, excuses) and flipped my lats and longs. As a result, people searching for an answer to my original question will not be helped by ...
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1answer
81 views

Deleting all custom CRS from QGIS

I am using a custom CRS for a project and whenever I load a .shp file, QGIS (3.8.2) creates a new custom CRS entry. As of today, I have about 10000 entries that are all the same and would like to ...
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62 views

Reprojecting rasters in QGIS 3.8.2

I have a raster layer which contains mean erosion values in tonnes/hectare/year. The layer is in EPSG:4283-GDA94 with degrees as units (the green layer below). When I save it (i.e. reproject it) to ...
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1answer
81 views

Transforming geometry points coordinates to WGS84 in geodataframe

I have shapefile that has been brought into my script as a geodataframe. Initially, it shows no crs although the source originally had a datum = NAD83. I want the coordinates for the geometry (the ...
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23 views

Exporting vector and raster in native projection

I'm trying to export raster and vector in native projection and resolution. And I have made a code for it. After exporting both raster and vector versions of data, I have added them to ArcMap, but ...
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58 views

Incorrect positioning in Google Earth Engine after exporting from Google Earth Engine

I have an image loaded in Google Earth Engine and I want to save an enlarged area around it both as a feature collection and another image. I use below code for this purpose and it works fine and ...
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GPS coordinates are not matching up with street network shapefile despite having same projection

As some background, my colleagues and I used a shapefile of a city's streets as a reference to collect GPS data. They were written simply with a field for: street name, lat, and long. The many points ...
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ESPG:27700 is displaying incorrect coordiantes [duplicate]

I am new to GIS, so forgive me. I have set up a project using Open Street Map as my background, I have set the CRS to ESPG:27700 British National Grid, however the status bar is not displaying the ...
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Reprojecting map service on the fly

When I load the map service into ArcMap 10.6.1 from this REST endpoint, it projects fine in its native projection (WGS_1984_Web_Mercator_Auxiliary_Sphere): https://seamlessrnc.nauticalcharts.noaa.gov/...
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1answer
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Projection system for India or Indian subcontinent with metric system

I am creating a buffer around my geometries using QGIS. The unit of the buffer is shown in degrees because the projection system is WGS84. I need to change the projection system so that unit for ...
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91 views

Rasterio reprojection doesn't seem to work

I would like to reproject a raster using the coordinate system of a shapefile as my destination coordinate system. I am using one of the examples in the rasterio docs as inspiration:. import numpy as ...
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1answer
82 views

Adding distance to geographic point [closed]

Given an odometry, a direction and a point where I'm, I would like to change my current position according to these variables. Let's say dLat and dLon are the difference of latitude and longitude ...
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1answer
53 views

gdalwarp to change block size also changes pixel values

I'm working with a GeoTIFF from http://www.fao.org/geonetwork/srv/en/main.home?uuid=ba4526fd-cdbf-4028-a1bd-5a559c4bff38 The original has data values from 0-11: $ gdalinfo -hist ./data/FAO/...
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2answers
418 views

Coordinate system for Finland in ArcGIS Desktop?

I have a shapefile of Finland in WGS84 (EPSG:4326), that I would like to convert to projected coordinate system, most commonly used in Finland. But, here is my confusion: I have found that from ...
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2answers
120 views

Defining and changing unknown CRS into WGS84

I came across a shapefile (no information available about the original CRS) with some unknown Reference System (City of Stuttgart in Germany). Example of coordinates looks like 3465878, 5482952. I ...
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84 views

How to georeference this image?

I need to georeference this .tiff. I see coordinate values ranging South-North 550000-554000 and West-East 10000-12000. Do I need to know the coordinate system to georeference the image ?
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PostGIS (or rpostgis) issue on Ubuntu 18.04

I've installed PostgreSQL 10 and PostGIS on Ubuntu following instructions here. Now I'm migrating an R interface from Windows to said Linux box and have an inconsistency I can't sort out. When I ...
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27 views

ArcGIS feature table SRID is NULL

I am using Oracle to store ArcGIS data. I have created my table named PARCELS from ArcCatalog, and I inserted some data using ArcMap. So when I run the following SQL query: select * from MDSYS....
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1answer
31 views

Is there a name for a coordinate system that measures angles with respect to the y-axis, angle increasing clockwise?

0 degrees correspond to Cartesian coordinate’s “y-axis” and all angles are measured with respect to this axis (clockwise increasing). Basis vectors are the “the vector pointing towards geographical ...
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Convert pixels to coordinates

I have a vertical image with size (W,H). I have info about the coordinates in decimals of the the upper left and bottom right (Lat1,Lng1,Lat2,Lng2). I have the Ground Sample Distance (GSD) of the ...
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28 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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1answer
59 views

Why does polygon area change when projection is changed in ArcGIS Desktop? [closed]

I have a simple polygon in a given coordinate system (example see below) as a feature in a FGDB. I would like to re-project the polygon to ETRS 1989 LAEA (EPSG 3035) using the project tool (data ...
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2answers
55 views

Ignoring ellipsoidal heights recorded from GPS when only interested in location?

I am not interested in converting ellipsoidal height into AHD heights, because I have a good DEM. However, this whole business about geocentric vs geodesic coordinate systems is thoroughly confusing ...
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1answer
78 views

QGIS, Grid, and CRS [closed]

I'm totally lost after some manipulations to add a grid in QGIS. The projection of my project is WGS84 3857. It's a map of UK. I tried View>Decorations>Grid option. Everytime I get a perfect squared ...
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Correctly displaying structural data in different map projections

How can I ensure the correct display of oriented structural data in GIS at northern latitudes when the map is reprojected. We are making new geological maps in northern latitudes and have a lot of ...
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41 views

Why is Sentinel-1 using geographic coordinate system and Sentinel-2 projected one?

I was wondering if there's any particular reason for Sentinel-1 to be georeferenced to WGS '84 (a geographic coordinate system), while Sentinel-2 is using UTM (a projected coordinate system). I couldn'...
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58 views

Translate custom MKT projection to proj4 string?

I need to use a specific custom projection that not exist as SRID into standard spatial_ref_sys of my GIS, PROJCS["Conica_Equivalente_de_Albers_Brasil", GEOGCS["GCS_SIRGAS2000", DATUM["...
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45 views

Comparing 2 GPS location data files to find if any location from one file is within a specified elliptical region of a location from another

I have 2 CSV files with GPS coordinates. I want to check if there are any locations in the first file which are inside a specified elliptical region surrounded by each location in the 2nd file. The ...
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1answer
55 views

How to set CRS on OpenStreetMap? V. 3.8

I am completely new to QGIS and have a basic wuestion, I am trying to create a map with OpenStreetMap and set it to a specific coordinate system. The problem is that when I set the CRS the map ...
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27 views

Using rotated projection in NetCDF file?

Could anyone show me a working example of a NetCDF file header with a rotated Cartesian projection where the datum is WGS84? From Spatial reference for netCDF data I see that coordinates can be ...
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State Plane Coordinate system is off in longitude by almost exactly 5 miles?

I am doing a simple well location map that involves me taking the coordinates from a table (coordinates that are in New York Long Island State Plane 3104), plugging them into Excel and then using the "...
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1answer
69 views

Raster TIFF file does not project onto QGIS basemap correctly

Forgive me if this is a simple fix, I am new to QGIS 3.8. I have a .tif file that when opened into QGIS is projected on the (0,0) lat/long coordinate of the base map and is very small. I have ...
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1answer
41 views

Reprojecting CRS from Geocode API fails to match shapefile CRS

I have a shapefile obtained from this link. library(rgdal) library(rgeos) dir <- tempdir() unzip('~/Downloads/4106902.zip', exdir = paste0(dir, '/4106902')) shape <- readOGR(paste0(dir, '/...
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36 views

Area measurements in Google Earth

Since Google Earth works in degrees, how does it perform area measurements? Does it momentarily convert to Cartesian coordinates and if yes by what projection and on which datum? Web Mercator has the ...
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65 views

EPSG:25833 in LeafletJs [closed]

I am currently working on the different coordinate system. Specifically, I am concerned with the correct presentation of EPSG:25833 (ETRS89/UTMZone89) in Leaflet. If I am right Leaflet used as ...