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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Convert coordinates from WGS84 to Gauss-Krüger Zone

I m currently trying to convert coordinates which come in a csv file in Lon/Lat to Gauss Krüger (Zone 4) using R. My script works perfectly fine, except that the resulting shapefile with the converted ...
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MODIS-Sphere to WGS84 coordinate system in ArcGIS [duplicate]

I want to overlay two global raster datasets on land use which use different coordinate systems (MODIS-Sphere & WGS84) using ArcGIS Desktop. There seems to be no direct transformation option from ...
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Distances in {Plate Carrée projection - EPSG:4326 - WGS84}

"4326 is just the EPSG identifier of WGS84" [3] Indeed http://spatialreference.org/ref/epsg/4326/html/ says it is a GEOGraphic Coordinate System: GEOGCS["WGS 84", DATUM["WGS_1984", ...
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How to use coordinates search bar in QGIS?

When using coordinates search bar in QGIS, it sends me to a completely different location. The GPS coordinates style is 37.381096, 14.561191 and the project is set to EPSG: 3857 with OpenLayers ...
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Relation between Geoidal separation and antenna altitude in GGA sentence?

I have searched about definitions and relations about geoidal separation and antenna altitude reported in GGA sentence. The more I read the more I am confused.So in a simple manner can anyone explain ...
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How are EGM96 and WGS84 related to each other?

As far as I understand the EGM96 defines the Geoid, where as the WGS84 Standard defines the Ellipsoid. Is the ellipsoid defined in the WGS84 standard defined in a way to maximize the congruency with ...
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Differences in angle measurements in Web Mercator

I am trying to measure different angles on 2D map using lat/lon coordinates taken from Google Maps, and Java library JTS. I have noticed a weird thing: my measurements are always distorted, except ...
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How do I get polygon shapefiles to project correctly in WGS 84?

I have a map with three layers: "Dorset Points", point shapefile "Counties...", polygon shapefile "Kilwood Park", raster I'm trying to project all three layers onto WGS 84. The project CRS is set as ...
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How to convert Lat & Long from Onemap.sg to Google Maps

I have a set of address for Singapore, I would like to take the Lat & Long from onemap.sg (SYV21: X, Y / Easting, Northing) and then store it in my databse , convert into (WGS84: Longitude, ...
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If rectangle corner points have same nearest neighbor, does whole interior?

If all four corners of a spherical (but actually WGS84/elliptical) rectangle are closest to a given point p in a set S, does that necessarily mean all points inside the rectangle are also closest to p?...
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Extract lat/long from GeoTIFF with Mercator CRS

I have a GeoTIFF file and with gdalinfo command I found the following info: Size is 1200, 1400 Coordinate System is: PROJCS["unnamed", GEOGCS["WGS 84", DATUM["WGS_1984", ...
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What are the corner coordinates of a global map in meters?

We all know that the corner coordinates of a global map in degrees are -180, 90; -180, -90; 180, 90; and 180, -90 (top left; bottom left; top right; bottom right). So what are the corresponding ...
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DotSpatial problems with reprojecting shapefiles

I have a shapefile with this projection: PROJCS["RD_New",GEOGCS["GCS_Amersfoort",DATUM["D_Amersfoort",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0],UNIT["Degree",0....
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Formulae to convert WGS84 coordinates (B,L) to spherical coordinates (phi,lambda)?

How to convert WGS84 coordinates(B,L) to spherical coordinates(phi,lambda)? I Need Formulae? the thing I'm wondering seems quite simple but I've been searching through internet and library of my ...
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Avoiding grids when transforming between SRS using ogr2ogr?

I'm trying to use ogr2ogr to transform from NAD27 (EPSG:4267) to WGS84 with my custom "towgs84" Bursa-Wolf parameters. However, I think the ogr2ogr uses grids which are part of the GDAL installation ...
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What does it mean to reproject a satellite image from utm (zone 13N) to wgs84?

I'm trying to understand some legacy code that processes landsat satellite images. Source images are in UTM and they are reprojected to WGS84. I'm a GIS noob but I understand that WGS84 is a datum for ...
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QGIS map wraparound in WGS84

I am learning QGIS. I'm working with the 'Natural_Earth_quick_start' data set from the tutorials. The WGS84 projection gives me the view I want. However, this looks like a sheet of paper, and on the ...
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Improving reprojection accuracy

Main question: how can I improve the accuracy of my reprojection? I am combining my dataset to a previous one, and I have chosen a different CRS: the previous one is in WGS 84 (EPSG:4326) and mine is ...
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How to add meters to EPSG:4326 coordinates? [duplicate]

I've some lat/long in EPSG:4326 coordinate system like Eiffel Tower position : ["lat" : 48.858274,"lon" : 2.2944] For automated tests I would like to get, for every points of my dataset, the x and y ...
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What's the math behind moving from a starting point in the direction of another one?

I am working with decimal-degree coordinates for a software and lack geographic background. I want to convert the coordinates to a grid to calculate distances and then move around using standard ...
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Converting coordinates from GCS_WGS_84 Linear_Meter to lat/long?

I have a LiDAR .laz file with points from Toulouse (France). I convert this file to a .las file using LAStools's las2las function. Then, using lasinfo on this .las file gives me some information, ...
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How to choose a projection for area measurement on building to continental scales?

I have many geographical objects described as polylines, polygons, multipolygons. All objects are in WGS84. Object could be: a building, stadium, park, street, highway, city, state, even country and ...
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Measuring different values in latlong Geotiff whether OTFR enabled or not

I'm using a GeoTiff file in QGis that has no projection per-se (it uses lat-long coordinates) and WGS84 datum. Further it has an x pixel size of 2.40475e-07 degrees and a y pixel size of -1.99028e-07.....
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SNPP Viirs swath data reprojection to wgs84

How can I reproject this file: I downloaded from: https://ufile.io/dev4b ftp://nrt4.modaps.eosdis.nasa.gov/allData/5000/VNP14IMG_NRT/Recent/ I tried using gdal... but I'm not so expert, so can't ...
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Why is the length of one degree in Turf 0.9988?

Calculating the (spherical) distance along one degree of longitude at the equator in Turf returns a number less than 1 (Try it): require('@turf/turf').distance([0,0], [1, 0], { units: 'degrees' }) 0....
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GTA V coordinates transformation to WGS84 [duplicate]

I'd like to use GTA V coordinates in leaflet to show some markers on the map. How to do a transformation between the (unknown) coordinate system of GTA V to WGS84 (leaflet)? I already tried to write ...
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QGIS project crashes when project CRS is changed and all layers are activated

My QGIS project has four vector layers, three of them are from the NaturalEarth dataset (countries, regions and ocean layer). The other two are shapefiles for plant locations and plant names. Whenever ...
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Finding GPS coordinates of point located between 2 known meridians?

I need to solve this task. How to find GPS coordinates of a point which is 1029.96033 km from prime meridian and 747.67936 km from 25th meridian, using WGS84 standard. It is a particular task but I ...
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Loading NAD83 and WGS84 layers together in QGIS?

I have downloaded parcel files for several counties in Washington State, and am attempting to overlay them on the OpenStreetMap Standard base layer (which is in WGS84 Pseudo Mercator). The majority of ...
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reprojecting .MBTILES to WGS

I have a huge ECW file that I clipped (qgis>clipper) to smaller GeoTiff and reprojected it(qgis>warp) to WGS 84 and then converted it (qgis>translate) to MBTILES but! The MBTILES file came out at ...
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Creating a Grid in WGS 84 in Feet

I am using Using QGIS 18.16 to try and create a grid measured in feet. I am having some issues with the best way to create a accurate grid in a project projected in WGS 84. I know that it uses ...
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Using OS MasterMap and Transverse Mercator projection in ArcMap?

I'm trying to use the Transverse Mercator projection in ArcMap, but cannot seem to locate it in the coordinate system list. I'm very new to GIS and ArcMap. I'm going to try to use some data from ...
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Choosing projection for rasterization of random latitude and longitude data in northern Atlantic?

I have a dataset in the WGS84 geographic coordinate system that I would like to interpolate along a grid using Python. It appears gdal_grid is not available through the Python bindings, so I plan to ...
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Projecting Lambert WGS 84 using QGIS?

I am currently preparing raster layers in QGIS to be fed into MaxEnt to run a species distribution model. I downloaded climatic variables in ascii format from I downloaded from Adaptwest (https://...
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QGIS layer stretched

I try to work out a way to assemble the layers I have got in my QGIS project so that no layer appears to be stretched. original coordinate systems: vector layer: WGS 84 UTM Zone 34N raster layer: ...
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ST_Distance versus ST_DistanceSpheroid?

As my client software uses lat/lon coordinates when communicating with my (spherical mercator) postgis database i decided to ST_Transform every geometry to WGS-84. However i noticed that ST_Distance ...
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Convertion of Geotiff from EU-DEM EPSG:3035 - ETRS89 / ETRS-LAEA to WGS84

I have downloaded elevation data from EU-DEM My background is in software engineering and my GIS skills are limited. How can I convert the aforementioned geotiff to WGS84 format geotiff with lon/lat ...
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Project raster tool stays white at iteration in ModelBuilder?

I want to project a bunch of rasters (WGS84) to different UTM (WGS84) coordinate systems. The coordinate system depends on a field value of a point shape. So on each raster lays a point with its ...
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QGIS 3.0 is showing a point's coordinates in the original spatial reference system instead of the project's spatial reference system

I obtained GPS coordinates of a point to within a couple centimeter accuracy using RTK GPS in the NAD83 Spatial Reference System. This information is included in the QGIS layer file metadata, and the ...
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Convert Ordnance Survery (GB) Easting/Northing data to WGS84 lat/long

This is my first venture into GIS datasets. I've decided to start a little project which will eventually hook into the Google Maps api to overlay/plot/pin from data in my database. I've started ...
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Getting relative XY coordinates

EDITED I started a project with CRS WGS 84 /Pseudo Mercator and I created a shapefile including point features in different locations around the globe. I have been already working on that for a while ...
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How to change Datum to WGS 84?

I have a shapefile with following projection information: PROJCS["kl2",GEOGCS["kl3",DATUM["D_Everest_1830",SPHEROID["Everest_1830",6377299.36,300.8017]],PRIMEM["Greenwich",0.0],UNIT["Degree",0....
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Converting WGS84 to ECEF in Python?

I am trying to convert some coordinates geodetic coordinates (WGS84) to ECEF. I've tried my own implementation in Python and using pyproj and am getting difference results. Could someone please help ...
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Vector CRS change 'extents too large'

Just trying to update an old project but for some reason it was set up in EPSG:4326, WGS 84. I have no idea what base maps were originally used to create it as they are no longer on the system, and ...
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Reprojecting EPSG:3412 to EPSG:4326 using GDAL?

I want to reproject "South polar stereographic" projection to "gcs WGS 84". I have tried the solution given to Re-projecting from Polar projection to EPSG:4326? through this commands I am getting ...
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Characteristics of different methods to convert ECEF to LLA

I'm trying to convert ECEF (Earth Centered, Earth Fixed) coordinates, which are defined in X,Y,Z, centered at (0,0,0) to LLA (Latitude, Longitude, Altitude). There are a couple of methods I found on ...
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Can percent overlap of polygon layers be calculated in geographic coordinate system? [duplicate]

I have two global polygon shapefiles in WGS84, and I would like to generate spatial stats on the % area of one shapefile that is overlapping the other. I understand that geometric calculations such as ...
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Looping Projection in ArcGIS ModelBuilder?

I've got a global DEM raster dataset in WGS84 and need to project this to all WGS84 UTM Zones. So after that I should have 120 raster, one in each Zone. Is there a possibility to automate this ...
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Error in projection or just a graphical error?

I've got a worldwide SRTM grid in WGS84 and want to reproject it to UTM coordinates. If I do so in parts of the world are strange tiles of the map (especially in Eurasia), which are not part of the ...
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How much error should occur when using WGS84 to ECEF coordinates?

The method is not recommended for distances larger than 4km. I am getting reasonable accuracy in terms of the east and north bearings, but for the up direction I am getting error upwards of 1km for ...

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