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Questions tagged [wgs84]

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

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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
142 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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90 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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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
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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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3answers
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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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88 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
173 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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128 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
146 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
104 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
111 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
223 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
193 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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285 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
305 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
215 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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142 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
103 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
173 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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28 views

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
88 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
442 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
44 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
208 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
226 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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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 ...
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1answer
387 views

How to map using more 'accurate' DATUM than WGS84? [closed]

WGS 84 is not very accurate as it is a compromise for the whole earth. Assuming theoretically I'm surveying using very accurate IMU and very accurate GPS (in WGS 84 of course). I think I'll get a ...
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1answer
2k views

How to convert resolution in degrees to resolution in meters?

I have a raster data with spatial reference GCS-WGS-1984 (datum D-WGS-1984). Its cell size is mentioned as (0.00045, 0.00045) in degrees. How can I convert this resolution in meters (i.e. linear unit)?...
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1answer
186 views

Tranform geometry to WGS 84

I need to transform some line and polygon geometry to WGS 84. At point it working fine, but at the line and polygone I have problems, I tried in many ways, but it does not work. In the screenshot you ...
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1answer
492 views

Transforming from NGVD29 to EGM96/WGS84?

I have this USGS reservoir elevation in NGVD29 datum and I want to transform it to WGS84 ellipsoid (SRTM 1 ArcSec DEM). How can I transform this point data (NGVD29) to EGM 96 or WGS84 ellipsoid so ...
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2answers
6k views

Generating polygon representing rough 100km circle around latitude/longitude point using Python?

Given a latitude/longitude point anywhere on earth, I would like to assemble a polygon that roughly resembles a circle with a 100km radius around that point. It doesn't have to be pin-point accurate, ...
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0answers
37 views

Complete map of Oceania (physical, from satellite,…) to use as background [duplicate]

I need to use a map to show a cartographic output based on raster elaborations. Specifically, I want to use this map as background to overlay over it some cells of my rasters layers. The type of map ...
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1answer
495 views

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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0answers
44 views

Converting raster from WGS_1984_plate_carree to WGS_1984 in ArcGIS Desktop?

I am a beginner using ArcGIS and I downloaded a TIFF which is in WGS_1984_plate_carree coordinate system. This image covers all the world and in this coordinate system the extent goes from -180 (left)...
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2answers
314 views

Lat/Lon to UTM conversion across multiple zones

I have a data set that represents the extents of 1:25000 map sheets over a whole state. Its stored in PostGIS in WGS84 lat/lon. Id like to retrieve the MinX, MaxX, MinY and MaxY for the bounding box ...
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2answers
192 views

DistanceOp.nearestPoints wrong result? [closed]

in order to compute distance in WGS84 geometries, I first call DistanceOp.nearestPoints(g1, g2) from JTS 1.13 to compute the nearest points of this geometries, where: g1 = LINESTRING (14.796 47.9467, ...
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0answers
461 views

Converting elevation from EU-DEM (ETRS89) to WGS84

I'm having a hard time trying to use elevation data from EU-DEM. This data is in ETRS89 (EPSG:4258), according to their site. Now, when I extract the elevation for a shore, I get 0 meters of ...
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1answer
2k views

What is Different Between X,Y and Latitude,Longitude or Meters

According to ESRI "To add a table of x,y coordinates to your map, the table must contain two fields: one for the x-coordinate and one for the y-coordinate. The values in the fields may ...
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1answer
148 views

Parametric equation with latitude and longitude

I have an arc described by three points: arc center, starting point, ending point. In order to calculate intermediate points of the arc, I would normally use the parametrized equation. x(t) = x(...
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1answer
447 views

Bessel_1841 to Mercator in Python

Despite similar Q&As I can't seem to get my answer. So I have this set of coordinate (124616.1535508, 486555.4631204) are mapped to the Bessel_1841 coordinate space. I'd like to transform these ...
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1answer
2k views

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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0answers
112 views

How to create a csv with lat long coordinates from a WGS84 layer with Grass

This question seems trivial but I'm having trouble doing this simple task. I'm working on a WGS84 location in Grass 6.4 and I'm trying to convert a raster layer in a csv with lat long coordinates ...
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1answer
164 views

Is there a common way of notating which revision of WGS84 is being used?

In requirements/specifications if WGS84 is indicated, is there a standard way to determine which revision of WGS84 is being referenced? For example, while WGS84 was developed in 1984, the latest ...
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0answers
319 views

Converting from Eastings and Northings on British Ordnance Survey to WSG84

I am a software developer currently working on a project that relies heavily upon knowing if our position is within a defined region - specified as a polygon using a set of points to define a linear ...
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0answers
243 views

Spatial reference conflict: WGS84 or clrk66

For a raster dataset, trying my.raster@crs or proj4string(my.raster) in R gives the PROJ.4 string "+proj=longlat +ellps=clrk66 +no_defs". I downloaded the raster from SEDAC here - the World link, ...
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1answer
72 views

Why does Lat/Long differ depending on the coordinate system of the data?

I obtained ETRS89 (ETRS_1989_ETRS-TM32;WKID: 3044 Authority: EPSG) data and I am using a Gauss-Krüger coordinate system (DHDN_3_Degree_Gauss_Zone_3;WKID: 31467 Authority: EPSG). Now I need to ...
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1answer
121 views

Georeference a binary grid file?

I currently have X amount of binary files that are in grid format. I have the span of these files in the form of latitude/longitude, plus the geographic projection. How can I turn these into ...
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2answers
164 views

Any idea why my data is off by 5ft?

I have a shapefile of survey control points (WGS 84) from the public domain provided by my local municipality. I'm using a GeoXH with a zephyr antenna. I have my coordinate system set to WGS 1984. ...
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1answer
1k views

Calculate percentage overlap of polygons in WGS84

I'd like to calculate the percentage of overlap (not area) of polygons in two different layers. Both layers are in WGS84 (EPS:4326). There are several tutorials on how to calculate area overlap for ...