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.

Filter by
Sorted by
Tagged with
0 votes
1 answer
24 views

Using EPSG 4326 in ArcMap

I have geocoded a series of addresses using ArcMap 10.5. The Geographic Coordinate System under the properties is: Geographic Coordinate System: GCS_WGS_1984 Datum: D_WGS_1984 Prime Meridian: ...
user avatar
  • 103
1 vote
1 answer
97 views

Saving Mapzen Global Terrain in QGIS with extent layer (-90 to 90 Lat and -180 to 180 Lon)

I am working on the elevation data from Mapzen Global Terrain. When I save them into GeoTiff, there is a CRS option in which I use ProjectCRS: EPSG 4326 - WGS84. However, when looking into the Extent ...
user avatar
0 votes
1 answer
33 views

Calculating map scale in WGS84

I use the mapViewer from the example of https://docs.geotools.org/latest/userguide/tutorial/map/style.html I would like to present the current scale (it's works ok in projected CRS), when I set WGS 84 ...
user avatar
  • 63
1 vote
0 answers
31 views

When using GeoPandas in Python, using the gdf.to_crs() method with the built-in gdf.crs method gives an innacurate transformation

I am trying to use GeoPandas to run some coordinate transformations and I am getting an inaccurate transformation when using the to_crs() method. Here is the code sample: import geopandas as gpd ...
user avatar
  • 11
4 votes
1 answer
92 views

Use ST_DWithin on WGS84 geometry data

I've just used osm2pgsql to import osm data to a PostGIS database, using lat/long option to store it in WGS84 projection. I would like to use ST_DWithin to select nodes close to a random point. When I ...
user avatar
0 votes
0 answers
26 views

find points on arc for shortest distance between two locations

I have two points on the earth. The shortest path between these two points forms an arc. How do I find the points that represent this arc? Bonus points if you can help with an answer in regards to an ...
user avatar
  • 205
1 vote
0 answers
48 views

How to check UTM ZONE with lat/lon coordinates in QGIS?

How to check UTM ZONE with lat/lon coordinates in QGIS? The work I need is, at QGIS I'm trying to save the location of the XYZ Tile - Google Satellite Map in GeoTIFF with Lat/Lon coordinates. When I ...
user avatar
  • 375
0 votes
1 answer
50 views

How do I convert from RT90 to WGS84 in R?

I have a dataset with a bunch of data in RT90 format. E.g 6275755 1538971 should be around 56.607512 16.439838 in WGS84, according to this online converter. How can I do this using R?
user avatar
  • 3
0 votes
1 answer
29 views

QGIS PROJ custom CRS for only shifting X and Y

I'm not very fluent with CRS and custom CRS but I'm only want to shift X and Y WGS84/32N coordinates. For example: with point A(115633.49, 57104.49) of my maps, in EPGS:32632 would be A(1112126.15, ...
user avatar
1 vote
2 answers
87 views

The WGS Coordinates (lat,long) of the shapefile (ETRS89 UTM 33 N) are swapped?

i am relative new to the whole gis world. To display some statistics in Leaflet on my website i choosed to use some district zones provided by the regional government (Berlin / Germany) as Shapefile (...
user avatar
1 vote
1 answer
114 views

Displaying WGS 84 (EPSG:4326) coordinate grid over EPSG:3857 map in QGIS

Is there a way to either display a grid with WGS 84 decimal degrees over a map that is in EPSG:3857, something like OpenStreetMap? I've tried changing the project's the map's and the grid's CRS but I ...
user avatar
1 vote
1 answer
76 views

Buffer problem (WGS84)

I have a point layer with the CRS WGS84, and if I put in other CRS, my points move to another world side. So, how could I do the buffer?
user avatar
2 votes
1 answer
114 views

Mercator vs Lambert Conic Conformal Projection

I am using coordinates in WGS 84 (coordinate reference system EPSG:4326). Unfortunately I am not very familiar with the different projections and currently do not see the wood for the trees. Is EPSG:...
user avatar
  • 21
1 vote
0 answers
50 views

QGIS converting my coordinates erroneously

I have a set of data in CSV format where the first, second and third columns are Point #,Coord of X and Coord of Y respectively (in UTM Zone 51N). Then I added a delimited text layer in QGIS 3.16.5 ...
user avatar
0 votes
0 answers
42 views

Looking for accurate point in polygon algorithm using WGS84

I'm looking for an accurate point in polygon algorithm using WGS84. The problem: Given the set of points that are the vertices of an arbitrary polygon drawn on the surface of the WGS84 reference ...
user avatar
  • 1
0 votes
0 answers
173 views

Error in rasterFromXYZ(xyz = centroids[, c("lon", "lat", "id")], crs = WGS84) : y cell sizes are not regular

I'm trying to convert a csv file set of values into a raster but keep receiving the above error. #Set raster options to improve speed of calculation rasterOptions(tmptime = 4, progress = ...
user avatar
0 votes
0 answers
51 views

Diagonal distance of two aircraft

I want to calculate the diagonal distance of two moving aircraft to estimate relative velocity. Since the altitude and GPS position(longitude, latitude in decimal degrees WGS-84) of those two are ...
user avatar
  • 1
0 votes
1 answer
363 views

How to convert WGS84 degrees coordinates to SK42 in meters in Java

How to convert WGS84 degrees coordinates to SK42 in meters in Java? Are there any code examples?
user avatar
0 votes
0 answers
98 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 ...
user avatar
0 votes
0 answers
21 views

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 ...
user avatar
0 votes
1 answer
55 views

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,...
user avatar
1 vote
1 answer
91 views

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 ...
user avatar
4 votes
2 answers
303 views

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 ...
user avatar
0 votes
1 answer
28 views

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 ...
user avatar
1 vote
0 answers
67 views

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 ...
user avatar
1 vote
0 answers
196 views

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 ...
user avatar
0 votes
0 answers
26 views

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 ...
user avatar
  • 101
0 votes
0 answers
104 views

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 ...
user avatar
1 vote
0 answers
31 views

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 ...
user avatar
  • 111
0 votes
0 answers
41 views

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?
user avatar
  • 1
2 votes
1 answer
61 views

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 ...
user avatar
0 votes
0 answers
70 views

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@...
user avatar
2 votes
1 answer
79 views

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 ...
user avatar
4 votes
1 answer
811 views

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 ...
user avatar
0 votes
1 answer
294 views

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 - ...
user avatar
-1 votes
1 answer
230 views

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" ...
user avatar
2 votes
1 answer
179 views

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 ...
user avatar
2 votes
1 answer
307 views

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 ...
user avatar
2 votes
1 answer
181 views

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 ...
user avatar
0 votes
0 answers
28 views

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?
user avatar
  • 145
3 votes
1 answer
571 views

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 ...
user avatar
  • 31
1 vote
0 answers
157 views

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 ...
user avatar
2 votes
1 answer
218 views

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 (...
user avatar
0 votes
1 answer
524 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?
user avatar
1 vote
2 answers
114 views

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 ...
user avatar
  • 11
1 vote
0 answers
122 views

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 ...
user avatar
  • 19
1 vote
1 answer
256 views

WGS84 geographic vs projected representation in ArcGIS Pro

I'm new at this (studying for a masters of GIS) and trying to understand the WGS84 geographic coordinate system as presented in ArcGIS Pro. WGS84 is a datum and reference ellipsoid EPSG 4326 is WGS84 ...
user avatar
  • 117
2 votes
1 answer
816 views

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 ...
user avatar
0 votes
0 answers
251 views

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, ...
user avatar
  • 379
1 vote
1 answer
116 views

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 ...
user avatar
  • 253

1
2 3 4 5
11