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Questions tagged [wgs84]

WGS84 is a geodetic coordinate system, the World Geodetic System 1984 (EPSG:4326).

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Calculating minimum distance in meters of two polygons (defined in lat/long coordinates)?

I'm new to GIS and I'm a bit lost in the terms and concepts, so I'm not sure I'm asking a valid question, but I need to calculate the minimum distance (in meters) of two polygons which are defined in ...
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26 views

Converting WGS84 to ETRS89 in ArcGIS Desktop?

I have a data which has no projection and has WGS84 as a coordinate System. I need to Import this data and Analyse it other data which have ETRS_1989_UTM_Zone_32N as a projection System. I have ...
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48 views

Converting L.GeoJSON Leaflet to different projection?

so I have some awesome basemap raster layers that use L.TileLayer to load, but the GeoJSON I have for my country polygons is all Web Mercator. My tile map is WGS84 or EPSG4326 (I think). But I ...
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39 views

Procedure of transforming coordinates?

I'm trying to understand the math behind this transformation. I should note that I've been able to perform the transformation using GeoPandas, but I'd like to understand what is going on under the ...
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1answer
56 views

Treating latitude/longitude as a pair of polar coordinates

I have latitude longitude coordinates covering the whole globe that I wish to perform arithmetic operations (mean, interpolation) on without concern for ambiguous points and wrap around and without ...
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1answer
42 views

Accuracy of ST_Contains on geometry column with WGS84 data

Apologies if this has been asked before; I found some similar questions (this mailing list post was particularly interesting: https://lists.osgeo.org/pipermail/postgis-users/2008-June/020353.html) but ...
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51 views

Why can't I reproject geopackage layer from WGS84 to ETRS89/UTM (QGIS3.6)

I accidentally digitized a layer (geopackage) in WGS84 (EPSG 4326). Now I need to reproject it into ETRS89/UTM zone 32N (EPSG 25832). I tried it in different ways which usually work without a problem (...
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48 views

CRS conversion of a point from Pulkovo 1952 (58) Stereo70 (ESPG 3844) TO: WGS84 (ESPG: 4326)

I have a shapefile loaded from delimited text with exact Northings and Eastings in the Romanian CRS (ESPG:3844). The layer CRS is correctly defined. Meanwhile, my project CRS is WGS84 (ESPG 4329). ...
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1answer
172 views

Google Earth Engine scale definition and export

I am trying to download Global Surface Water (Pekel et al 2016) data from Google Earth Engine. It has a specified maximum spatial resolution of 30 [presumably meters]. When I export the data ...
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1answer
102 views

Projection Error with Google Maps Basemap

I have a shapefile of building lots in Manaus, Brazil, that I have re-projected into the WGS84 (EPSG:4326) CRS using the "project" tool in ArcGIS. I am now working in QGIS, and am trying to add the ...
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45 views

Changing srs-definition string in geopackage with ogr2ogr

When creating a geopackage with ogr2ogr in WGS84 (EPSG:4326), the srs-definition string cannot be interpreted correctly when loading the data into ArcGIS. ArcGIS does not project the data corretly ...
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80 views

Calculating area in the attribute field of a QGIS 3.4.3 project with multiple CRS

The area calculations in my project derived from the attribute field show values way below actual area, because the attribute field assumes the project CRS (EPSG:3857). However, this CRS should remain ...
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59 views

Calculate the next coordinate from given starting point and distance

On the answer to Calculating Latitude/Longitude X miles from point? what is the tc value? lat = asin( sin(lat1)*cos(d)+cos(lat1)*sin(d)*cos(tc) ) dlon = atan2( sin(tc)*sin(d)*cos(lat1),cos(d)-sin(...
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1answer
115 views

Translating WGS 84 datum to mean sea level?

I'm very new to GIS so here my question is I have WGS84 DEM data for my country and I want to calculate the sea level rise. I will use QGIS raster calculator, my problem is I need to find sea level ...
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1answer
267 views

Converting NAD83 (epsg:4269) to WGS84 (epsg:4326) using pyproj

I'm trying to convert US census data (NAD83) to WGS84. I know the difference between the two is quite minor, but trying to apply the transformation using pyproj does not do anything. e.g.: from ...
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How to convert WGS84 coordinates to screen pixel coordinates? [duplicate]

I have a set of points that are defined as WGS84. In ArcMap the featureclass details are: Geographic Coordinate System: GCS_WGS_1984. Datum: D_WGS_1984 Prime Meridian: Greenwich Angular Unit: Degree. ...
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39 views

Unknown coordinate system from web API

I'm trying to figure out (and eventually convert to WGS) projection system of coordinates I get from one web API service. As an example - lat, long = 71804125, 180232666 is a point in Cracow, Poland. ...
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35 views

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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145 views

How to convert from EUREF-FIN to WGS84 in geopandas

Trying to convert ETRS-TM35FIN coordinates in the EUREF-FIN projection to WGS84 in geopandas with this: x = 429300 y = 7084490 df = pd.DataFrame([[x,y]],columns=['x','y']) df['Coordinates'] = list(...
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1answer
109 views

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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106 views

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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1answer
76 views

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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QGIS reprojection is identical to original map; Deir ez Zor / Levant Stereographic (EPSG:22780) to WGS 84/UTM zone 36N (EPSG:32636)

I have a topo map which I want to georeference into Deir ez Zor / Levant Stereographic (EPSG:22780) and then transform into WGS 84/UTM zone 36N (EPSG:32636). My goal is have as little divergence to ...
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31 views

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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1answer
100 views

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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0answers
65 views

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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64 views

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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2answers
2k views

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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785 views

Translate Cartesian coordinates to WGS84, preferably in pyproj?

I have some Cartesian coordinates: x = 3862525.511 y = -109738.522 I need to translate them into WGS84 coordinates, preferably using pyproj. Is this possible, or have I misunderstood the nature of ...
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57 views

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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1answer
151 views

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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81 views

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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1answer
98 views

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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1answer
90 views

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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1answer
73 views

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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1answer
159 views

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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0answers
146 views

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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161 views

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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1answer
166 views

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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0answers
155 views

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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122 views

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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1answer
65 views

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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1answer
142 views

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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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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1answer
63 views

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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1answer
305 views

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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1answer
41 views

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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2answers
151 views

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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1answer
218 views

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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0answers
37 views

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 ...