Questions tagged [wgs84]

WGS 84 (that spelling) is the name of an ellipsoid (EPSG::7030), the name of a geodetic coordinate reference system (EPSG::4326), and the alias of a datum (EPSG::6326), official name World Geodetic System 1984. WGS84 (no space) is the alias of the ellipsoid (EPSG::7030). WGS 84 is most commonly used to describe the coordinate reference system.

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35 views

Changing origin in QGIS projection

My issue is that the QGIS print composer cannot print images that have coordinates passing beyond 180 degree in WGS84 (since it's going from -180 to 180 degree). The area of 180 degree is in the ...
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Image is shifted when reprojected to WGS84 in Earth Engine

The Problem: A Landsat 8 scene undergone same process in ArcGIS and GEE. In ArcGIS, the scene is downloaded from USGS Earth Explorer (it can be downloaded from here) and reprojected to WGS84. In GEE ...
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vDatum MSL to WGS84 vertical command line

I have altitude data points that are in units of height above MSL, and I'd like to convert these to WGS84 altitude (height above WGS84 ellipsoid). I'm trying to use vDatum command line to achieve this,...
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Uncorrected pressure altitude to WGS84 altitude

I'm trying to convert the altitude returned by an ADS-B receiver into its WGS84 altitude. It's been a wild ride trying to determine which type of altitude is returned from ADS-B (I get completely ...
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Convert Vertical Datum of GDAL file

I have 2 DTM datasets, the first has a vertical datum of WGS84, while the second has an orthometric vertical datum (maybe EGM96). gdalinfo seems to only provide the horizontal datum info: Size is ...
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Transformation accuracy MAGNA_To_WGS_1984_1

I am very new to ArcMap and GIS data in general and I have encountered the following problem. I am using two different sources of geospatial data on Colombia with one using GCS_MAGNA and the other ...
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Finding local EPSG code for WGS84 coordinates offline

My task is convert WGS84 latitude/longitude coords to local Russian coords system and back. I found that there are several EPSG codes for local systems 28400:28430 (mb even more). There are several ...
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Transforming coordinates from Swiss reference system LV95 to WGS84 using R

When I transform coordinates from LV95 to WGS84 using the R function spTransform, the resulting WGS84 coordinates are approx. 170 m off in direction North-East, i.e. they are incorrect. Here is my ...
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How to interpret shapefile area projected in WGS84?

Using ArcGIS Pro, ArcGIS Online I created a feature layer of polygon land areas of interest. The 4 separate polygons are hundreds of hectares (or kilometers) in size. I projected the feature layer ...
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Converting sinusoidal projection into WGS84 lat and lon values using MATLAB for MODIS file

I have a MODIS HDF file, MCD19A2 product. The files are stored using sinusoidal projection for a tile. A tile is then divided into 1200 by 1200 grids (or in 1200 by 1200 matrix, you can say). The ...
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OpenTripPlanner 1.4 Elevation TIF Issues

I'm using the OpenTripPlanner routing engine (v1.4), and am trying to load in elevation information via a GeoTIFF file. When I load in my TIF file though, the elevations are always being set to 0. The ...
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Converting WGS84 to ECEF in Google Earth Engine

I am trying to convert WGS84 to ECEF in Earth Engine for ease of vector calculation. Is there an existing function that can achieve this, or will I have to manually write the code?
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How come the Antarctic REMA Explorer say its 108,66 km from 90°S to 89°S?

I am trying to understand the calculation for distance at the Antartic REMA Explorer site: https://livingatlas2.arcgis.com/antarcticdemexplorer/ Zooming in, selecting the measure tool and doing a ...
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ArcGIS/ArcPy gets XY backwards?

Okay, this has been bugging me for a long time, but I've always been too embarrassed to ask given how basic a question it is. Do the data access cursors get XY backwards when you use tokens like SHAPE@...
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Can QGIS display coordinates in a chosen format as I move the mouse over a topographical map?

Australian bushwalkers offer map coordinates in the GDA94-56 format (essentially identical to WGS84). When I am working on topo maps in QGIS, it would be fantastic to quickly locate a coordinate ...
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Create polygon grid based on spatial points (WGS84) with R

Initial problem: I am currently trying to create a spatial grid in which each cell is centered on predefined spatial points. These spatial points are projected in the WGS84 international coordinate ...
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Projection of map to WGS 84 3857 in QGIS ends up shapfile on 0.0 (near Africa) [closed]

I have a building shapefile in my country which, when imported is in CRS EPSG 4326 - WGS 84. I need to project this to typical latitude, longitude values (If my GIS knowledge is right, to EPSG 3857 - ...
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How do you convert WGS84 GPS coordinates to "SWEREF 99 TM" ones in JavaScript + Leaflet.js + proj4 + proj4leaflet? [closed]

I have made a map system with JavaScript + Leaflet.js + proj4 + proj4leaflet. I'm trying to link to Lantmäteriet's map with the current position, but, of course, they don't use the "WGS84" ...
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Wrong coordinates but polygons and map are aligned just fine in QGIS

I have 2 polygons I downloaded from public databases and I used the Bing aerial map with the OpenLayers plugin. They are aligned PERFECTLY, they are in the area they are supposed to and everything was ...
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How to calculate the corner points of a grid if centre points are know

I am working with a file which has the coordinates in WGS84 format. From this file I have calculated the Cartesian coordinates using the following code: import numpy as np import pyproj from netCDF4 ...
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Importance of WGS84 realization for centimeter-level accurate UTM transformation

I am working with a high-end GNSS receiver connected to an RTK correction data service. I need to measure the position of a ground point with centimeter-level (2-5cm) accuracy. The GNSS receiver ...
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UTM to WGS84 in QGIS 3.18 circle not round [duplicate]

I am using QGIS 3.18. I have a GeoJSON file with circles in UTM CRS. I exported it to WGS84 and my circles became not round, more like an ellipse. What is the problem?
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Getting accurate distance measurements using EPSG:3857 in QGIS

I'm still a beginner at QGIS and am currently using it to plan trap placement for an upcoming fieldwork session in Central Europe. Traps should be placed along a transect 100m apart. So far when I ...
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Calculate the area of a polygon on the surface of the Earth

I'm trying to write a function that will accept an array of coordinates and calculate the area of the polygon. function getArea(lat_long: Array<LAT_LONG>){ lat_long.push(lat_long[0]) const ...
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Wrong position when reprojecting layers from EPSG:32651 into EPSG:4326

I have a vector layer on my project that I digitized from a geologic map. I originally projected it on WGS 84 UTM Zone 51 North (EPSG:32651) when I was digitizing. I tried reprojecting it to WGS 84 (...
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195 views

Generating approximate polygon for circle with given radius and centre (without using shapely) [closed]

I am given center and radius (in km), I want to generate coordinates for the circle. Every example on GIS.SE uses Shapely. Is there any way to do it in python without using Shapely?
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Mapshaper -proj resulting shapes in wrong Hemisphere

I have shapefiles that I am projecting in Mapshaper, however when I use -proj WGS84 the end-result (topoJSON) has the shapes in the Northern Hemisphere, rather than the Southern Hemisphere. On ...
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PROJ: Using pipeline in C++ API

I have to convert (lat,lon) coordinates from WGS84 (ITRF2014) to ETRS89 (Finland) (lat,lon) in a C++ program. I am not experienced PROJ user, I have used proj.4 sometimes. From command line: projinfo -...
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Trying to convert a shapefile that seems to be using UTM coordinates to WGS84 in QGIS [closed]

I've been trying to convert this polygon shapefile of historic Swedish parishes from UTM coords to lat/long and nothing seems to be working. I've tried defining projection, reprojecting, saving these ...
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WGS84 geographic vs projected representation in GIS

I'm new at this (studying for a masters of GIS) and trying to understand the WGS84 geographic coordinate system as presented in ArcPro WGS84 is a datum and reference ellipsoid EPSG 4326 is WGS84 using ...
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Very simple Latitude/Longitude to WGS84 conversion

As from here, I'm using the OpenTopography API to download a geoTiff heightmap, and it uses 4 WGS84 Coordinates, but the map I've supplied to the user gives back longitude/latitude coordinates. I'm ...
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Georeference an image in WGS84 where I have the center lat/lon and image dimensions

I have a drone image which I have warped into the proper orientation and shape and now I'm trying to georeference this image. My image pixels are 0.2 meters, my image dimensions are 750x750 pixels, ...
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Relationship between ECEF and WGS84

What’s their relationship or difference? I’ve read that WGS84 uses ECEF, but they can be converted between one another. If not mistaken, they are both geographic coordinate systems and not projected ...
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What is meant with EPSG:4326 projection

I'm pretty new to GIS and I've learned about both the geographic coordinate system, which defines a location on a 3d model of the world and the projected coordinate system to map this to a 2d surface ...
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Render raster from vector tiles in WGS84 (EPSG:4326) using Tileserver GL

I have vector tiles that are in the WGS84 CRS (EPSG:4326). I can confirm that they are in WGS84 because on a Web Mercator basemap (pg_tileserv preview) they display in Svalbard (should be in Austria): ...
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How can I download SOILGRIDS v2 data through WCS in EPSG:4326, keeping (as close as possible) to the native 250m resolution?

SOILGRIDS data are currently available at 250m resolution. The resolution needs to be specified as part of the WCS download request, e.g. (Python MWE from https://git.wur.nl/isric/soilgrids/soilgrids....
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Convert x, y, z local points to WGS84 having only 3 coordinates known

I have a set of (x, y, z) points on a local coordinates system cartesian plan. For only 3 of these N points, I have the corresponding WGS84 coordinates (latitude, longitude and altitude). How can I ...
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122 views

State lat/long from CSV-file

I am trying to place points in QGIS that are given in a csv-file, coordinates are given in WGS84 (4326) but the positions are like this LAT;LONG 5724.3180;1548.4021 I can't get QGIS to place them ...
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How does grass r.viewshed take into account the Earth curvature?

Up to now I always had to do such analysis in a local Cartesian Coordinate System and on relatively small datasets, but today, I want to compute a viewshed analysis on a large raster DEM which is ...
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QGIS default projection used to render a WGS84 map

This question seems naive at first glance, but it's subtle. I was recently pondering... How does QGIS actually represent maps and features when we select the 'WGS84' CRS at the project level? I ...
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EPSG:3857 to 4326 - incorrect geometry

I need to get simplified boundaries of all countries with some buffer around them (20 km). I am using QGIS, I converted my country polygons vector layer from 4326 to 3857, set buffer, used simplify ...
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Mapping lat/lon coordinate pairs to a given EPSG:4326 projected cartesian coordinate system

I want to find out the timezone a GPX track is in by looking up the first coordinate pair. I took the shapefile from Timezone Boundary Builder and created a PNG image via qgis from it (using the ...
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Converting Lat Lon in WGS84 format to UK NGR in QGIS [duplicate]

I have csv file that has WGS Lat/Lon, what I need to do is convert these to UK NGR i.e Easting/Northing. In QGIS there under Field Calculator I think there are some defined operator like $X and $Y ...
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219 views

Passing GeoJSON API to Leaflet (proj4leaflet) map

I have created a geographical view of a point using Leaflet based on a coordinate system data. Since I'm using the coordinate system rather than lat and long, I'm using proj4leaflet for the conversion ...
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Changing shapefiles from geographic (WGS84) to projected (EPSG:2263) coordinate system using QGIS

I am trying to calculate service area polygons using the QNEAT3 plug in tool for a project I am doing. However, I got an error before these polygons could be created. 2021-01-04T08:03:38 CRITICAL ...
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Converting coordinate system produces distorted image

I have a GeoTIFF file produced from a LAZ file. I would like to convert its coordinate system to the WGS84. However, after the conversion the resulting image is skewed (has a perspective distortion). ...
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Converting NetCDF WRF weather forecasts from a custom Lambert Conformal Conical projection to WSG84

I'm having some trouble reading a WRF weather forecast prediction file where the coordinates are in a custom Lambert Conformal Conical projection. My final goal is to get the weather forecast a a ...
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Georefencing vector from Stereo 70 to WGS 84 avoiding deformations

Is there a chance to Georefence or transorm a vector from CRS Stereo 70 to WGS 84 and avoiding all the deformations? In example is map of Romania, which goes on 0 coordinates of WGS 84.
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Determining the Coordinate system for set of points

I have the following set of points. X Y 618263.27 6153928.04 601343.35 6492627.09 670869.41 6448843.47 499463.38 6201245.29 569373.30374535 6140971.32153155 579069.9206 6142002.1728 587240....
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Convert ERA5 data to WGS84

I'm using the cdsapi python package to download ERA5 data in netcdf format. I'd like to plot it alongside data from a GPS track and so I'm trying to ensure that the coordinate reference systems (CRS) ...

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