Questions tagged [wgs84]

WGS 84 is a geodetic coordinate system, commonly referred to as EPSG:4326.

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Plotting great circle lines in Cesium (just getting started)?

How does one plot Great circle lines in Cesium (3D, not 2D) using the WGS84 ellipsoid? I found something like this in another thread but I'm having trouble applying it to my application (simply ...
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Incorrect false northing in pyproj?

I am using version Rel. 5.2.0, September 15th, 2018 on OSX but get the same answers on other platforms with other versions. prompt> echo 3 0 | proj +proj=utm +zone=1 +ellips=wgs84 500000.00 ...
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QGIS Transforming from ETRS89 to WGS84 - why are Helmert parameters 0?

If ETRS89 (EPSG:4258) is tectonically fixed and WGS84 (EPSG:4326) isn't, the Helmert coefficients shouldn't be zero, right? In fact these parameters should diverge more and more with every new release ...
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What are the map units that WGS84 uses?

I'm using a tool in QGIS where I'm creating points in a grid and I am specifying the points to be created every 0.5 of the user-defined atlas size. In other words, 0.5 map units of the CRS. What is ...
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Java - Conversion from NAD27 to WGS84

I'm in the process of adding automatic CRS conversion to a Spark application and running into some problems with the implementation. Each row in a dataframe that is being converted will contain ...
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Is height conversion between ellipsoids necessary?

I have measurement data that uses X/Y in different zones of JGD2011 and an ellipsoid height above GRS1980 (but it also includes a geoid height as well). My task is to transform this data to "WGS84 LLA"...
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32 views

MGI_Lambert to WGS48 UTM33 transformation problem

I tried to reproject a raster (DEM) with MGI_Lambert Projection (Austria) into WGS48 UTM33 Zone. I did it with ArcMap 10.6 using the recommended MGI_To_WGS_1984_3 transformation aswell as a ...
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65 views

Adding CSV file with lat/long to map in different CRS in QGIS

I'm very new to QGIS, so I'm sure the solution to this is common sense. I have a map in the WGS 84 zone 58S CRS and am trying to add lat/long coordinates from a text file to it. The issue: the WGS 84 ...
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60 views

Convert WGS 84 Coordinates to Arc 1950 coordinates

How can I convert WGS 84 coordinates to [Arc 1950][35s] coordinates? e.g S12.14127 E25.96643 S12.23535 E25.90588 S12.23535 E25.90588 S12.23859 E25.79461 S12.27073 E25.66638
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Changing Map Coordinate System Changes in ArcGIS Pro Changes Azimuth

I am trying to create a label that will overlay a line in ArcGIS Pro, the layer is coming from a PostGIS database. The underlying materialized view for the label/symbol overlay is something like this: ...
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Converting from EPSG 25833 to WGS 4326 using QGIS? [duplicate]

I have a layer of Brandenburg (Germany) in EPSG 25833 which I want to tranfrom to EPSG 4326. Similar to this answer to Transforming shapefile to WGS:84 (EPSG: 4326) in QGIS?, I set the CRS to EPSG ...
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1answer
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Land Surveyor Coordinates

I've received these coordinates from a land surveyor and no matter which converter I try or where I insert these coordinates. I really can't find them in Google Earth or any other map. If anyone ...
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Converting distance from km to degrees (WGS84)?

Is there an equation in which I can convert distance in kilometers into degrees? I am performing a Kriging analysis and when I am measuring the distance between the input points (for LAG and Major ...
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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 ...
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1answer
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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 ...
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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*...
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1answer
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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 ...
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1answer
379 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, ...
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362 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 ...
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47 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 ...
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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-...
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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 ...
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208 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 ...
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63 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 ...
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1answer
141 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 ...
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62 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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201 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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1answer
88 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
202 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
56 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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1answer
74 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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1answer
72 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
338 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
250 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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1answer
83 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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1answer
113 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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159 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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263 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
570 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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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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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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1answer
152 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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1answer
121 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
86 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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1answer
108 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 ...
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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 ...
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1answer
136 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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87 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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78 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 ...