Questions tagged [wgs84]

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

Filter by
Sorted by
Tagged with
0
votes
0answers
13 views

How to reproject GeoTIFF from WGS84 to UTM with gdalwarp?(win 10)

I used code like below: gdalwarp -t_srs "+ proj = utm + zone = 1 + datum = WGS84" geo.tif output_utm.tif and I caught a problem : Translating source or target SRS failed: + proj = utm + zone = 1 + ...
0
votes
0answers
22 views

QGIS 3 vertex tool in WGS84 [on hold]

I have a shapefile in WGS84 that I want to edit some of the polygons (move nodes, add nodes) but when the CRS of the QGIS project is set to WGS84 and I try to use the vertex tool the cursor just spins ...
2
votes
0answers
27 views

WGS84 to MSL and opposite

I am using Cesium to create point in a map. The point will be then flyable with a drone. I have the following problem, 1) The user set a point altitude to 20 meters in a 2D flat map. 2) The point ...
0
votes
1answer
51 views

Buffering geometry with points in WGS84 using shapely?

I have a polygon in python shapely that I would like to buffer with a 100 foot buffer. If the polygon is stored as a series of WGS84 lon/lat points how would I go about calculating the distance of ...
-3
votes
1answer
35 views

Proj4 give always a false answer [closed]

I'm trying to use Proj4 (dll) to convert from Lambert93 to WGS84 but it always give a wrong answer: // EPSG:2154 : Lambert 93 definition: https://spatialreference.org/ref/epsg/2154/proj4/ const char*...
2
votes
1answer
70 views

Converting from UTM to WGS84 using GeoTools?

I have created a function that reads a shapefile file and I get its geographic coordinates well. This works fine. My problem is that I need those coordinates in wgs84 format (latitude, longitude), but ...
2
votes
1answer
92 views

Formula to convert xyz Cartesian to latitude / longitude using WGS84 [closed]

I need formula to convert xyz Cartesian coordinates to latitude,longitude,altitude using WGS84 to use in VBA application x,y,z coordinates will be normal points (lets say, user pick point in AutoCAD, ...
1
vote
0answers
102 views

Converting vector in NED to ECEF? [closed]

I have a geodetic WGS84 position, lat, lon, alt, and direction cosines from the same point, uN, uE, uD. I'm brand new to geodetic/ecef conventions. How do I take a vector (say, a unit vector with ...
0
votes
0answers
28 views

Transform ellipse representation from major/minor (meters) to degrees

I am given an ellipse represented by a quadruple (major, minor, center, azimuth) where major,minor are the ellips's axis length in meters, the center is the WGS84 coordinates of the ellipse's center ...
1
vote
0answers
13 views

Error while converting WGS84 => Albers-Siberia by ogr2ogr [duplicate]

While converting from one geosystem to another polygons crossed by 180 meridian left got split into eastern and western parts. Tool used - ogr2ogr library. Initial geosystem - WGS84, target - Albers-...
0
votes
0answers
46 views

Scaling WGS84 coordinates?

I know this is a weird question, but I would like to know if it is possible to construct a proj4 string so that I can use proj4 to convert from WGS84 to a "scaled" WGS84 system. For example with a ...
1
vote
0answers
152 views

How to calculate OSM WGS84 Lat and Lon to meters in C++?

Summary I am converting OSM coordinates into X and Y values with accurate distances in meters between all points using c++. The calculations/code I am using is resulting in an incorrect ratio/scale ...
2
votes
0answers
54 views

Stereographic projection of WGS84 ellipsoid [closed]

According to this source, an optimal projection for small, roughly square areas is the stereographic projection. The wikipedia page of the stereographic projection shows how to convert from spherical ...
1
vote
1answer
95 views

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 ...
0
votes
1answer
43 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 ...
0
votes
0answers
149 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 ...
3
votes
1answer
70 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 ...
1
vote
1answer
124 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 ...
1
vote
1answer
48 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 ...
1
vote
1answer
65 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 (...
2
votes
1answer
63 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). ...
2
votes
1answer
284 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 ...
0
votes
1answer
182 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 ...
0
votes
1answer
72 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 ...
0
votes
1answer
105 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 ...
-1
votes
1answer
118 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(...
0
votes
1answer
200 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 ...
1
vote
1answer
451 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 ...
0
votes
0answers
21 views

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. ...
2
votes
0answers
40 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. ...
1
vote
0answers
38 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 ...
2
votes
1answer
125 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 ...
0
votes
1answer
114 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 ...
2
votes
1answer
83 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?...
1
vote
1answer
100 views

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 ...
1
vote
0answers
34 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 ...
1
vote
1answer
126 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 ...
1
vote
0answers
79 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 ...
1
vote
0answers
73 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 ...
1
vote
2answers
3k 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 ...
0
votes
3answers
1k 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 ...
0
votes
0answers
69 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 ...
5
votes
1answer
160 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....
1
vote
0answers
98 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 ...
-1
votes
1answer
120 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 ...
1
vote
1answer
98 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 ...
0
votes
1answer
88 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 ...
1
vote
1answer
190 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 ...
1
vote
0answers
181 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://...
1
vote
0answers
223 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: ...