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.
589
questions
0
votes
0
answers
13
views
Moving correctly projected features from ArcGIS Pro to UgCS
Goal: get a 1/10 Nautical Mile radius circular feature (currently in NAD83/CA State Plane VI WKID:2230), in a .kml file, from ArcGIS Pro (3.1) into UgCS mission planning software (4.21.0) as an ...
0
votes
0
answers
38
views
Plotting XY coordinates obtained from Google Maps
I know how to plot XY coords in ArcMap—right click the table, plot XY, select geographic coordinate system (coords are in degrees), etc. My question is rather when selecting the GCS I always go with ...
0
votes
0
answers
20
views
Are there algorithms available to draw a straight line in 3D space based on WGS 84 points?
Given
two points (A,B) defined in the WGS 84 system - i.e. each with their own Lat-Long-Alt coordinate
the plane T tangent to the WGS84 ellipsoid at point A
is there an algorithm/formula to compute, ...
0
votes
0
answers
19
views
Soil moisture index from European drought observatory
For my current task, I am using the soil moisture index data from the European Drought Observatory. In the download section, the data is natively provided in the Lambert Azimuthal Equal Area ...
0
votes
0
answers
30
views
Shapefile layer is offset when reprojected to WGS 84
I have some shapefiles in UTM EPSG:37721, however, to cut the variables I need the polygon in WGS84. When I redesign my square shapefile in WGS, it appears crooked in QGIS. Is this right? Because if I ...
0
votes
0
answers
17
views
Wrong Coordinates in QGIS Map Grid
These are incorrect decimal degree coordinates for Puerto Rico. Layers are suppossed to be georeferenced or is this common for layer not georeferenced?
0
votes
0
answers
31
views
Changing a raster format and coordinate system: GeoTiff in WGS84 to ASCII in UTM 35N
I have a DEM in GeoTIFF format in EPSG 4326 - WGS84 that I export from WindPro. I want to use the same DEM as input for another wind software that accepts only ARC/INFO ASCII GRID (ascii) format and ...
0
votes
0
answers
32
views
Raster Projection Error 999999
I tried to change the coordinate system of a TIFF file from UTM to Albers Equal Conic using project raster tool. However, I keep getting this error. Any one knows why? where is the problem?
1
vote
2
answers
54
views
Raster Vertical Projection ArcGIS Pro v3.1.2
I'm trying to do a vertical coordinate system transformation on a raster, from WGS84 to NAVD88. I have downloaded and installed the appropriate coordinate systems package but cannot accomplish this ...
0
votes
0
answers
22
views
Point Files not always aligning based on Coordinate System
I have two CSV files that have GCP points for a drone survey area. The points are exactly the same location just collected in different coordinate systems. First is NAD83 (CSRS) / UTM 10N and the ...
0
votes
0
answers
59
views
Projection issue between WGS84 and EPSG:2100
I got a new GNSS receiver (Sparkfun RTK Faucet) and I also setup my base station. Now I am collection GPS date points down to an accuracy of about 14mm.
My goal is to convert the data points to the ...
1
vote
1
answer
217
views
Transforming from NAD83(2011) or from WGS84 gives the same result (pyproj)
I'm trying to transform (using pyproj) the same coordinates, first from WGS84, and then from NAD83(2011), and I'm getting the same result:
from pyproj import CRS, Transformer
from_wgs84_transformer = ...
2
votes
1
answer
90
views
How can I determine point coordinate sysystem?
I downloaded GIS data from IPUMS NHGIS. The polygons points are for example:
"[-1967092.8957,1446306.6612]" I attempted to convert automatically in https://mapshaper.org/ using "-proj ...
1
vote
1
answer
49
views
Grids displaying relative instead of global coordinates in QGIS
I have a set of three zoomed-in maps I need to plot grids for. They need to be in degrees, minutes, seconds and relative to the global standard. The grids I was able to plot all show relative ...
1
vote
0
answers
126
views
Transform TEME TLE derived positions of a GPS satellite to the WGS84 coordinate system for comparison
I am trying to compare TLE derived x,y,z positions of a GPS satellite with those derived from precise GPS ephemerides (NGA). However, I am having some trouble getting the coordinate systems and ...
1
vote
1
answer
252
views
What is the importance of altitude in coordinates (WGS84)
I have these parameter in my system.
<AirportReferencePoint>N27584300 E034233600 43.586400</AirportReferencePoint>
What is the use of the altitude 43.586400 in these parameters?
1
vote
1
answer
64
views
Importing WGS84 points into project CRS OSGB36 broken, showing black screen
I am relatively new to all things GIS.
I am trying to import CSV points collected in WGS84 format eg. LAT 55.93887932 LONG -4.50803484, into a project with CRS set to OSGB36 (EPSG: 27700).
This is ...
0
votes
1
answer
41
views
Projection issues Landsat 5 in QGIS
I'm using an image of Landsat 5 in QGIS and even though I fix the projection to WGS84 EPS: 4326 using Raster tool Warp. The projection is out of focus. I normally work with Landsat 8 and never had ...
0
votes
1
answer
70
views
ArcGIS Pro - Voxel layer doesn't show even though all coordinate systems match
I created a NetCDF file and then added it as a multidimensional voxel layer to ArcGIS Pro. I then got this warning:
Voxel layer can only be drawn in local scenes with the same coordinate system as ...
0
votes
2
answers
88
views
Converting DXF format using Beijing 1954 datum to WGS84 [closed]
I have a file in DXF format. I am trying to convert this format to shapefile, but CRS does not match. The information I have is that the Coordination System is in DXF format and has UTM-based ...
1
vote
2
answers
557
views
Convert WGS84 to Local Point
I have WGS84 points and I should convert to local coordinates (x, y, z) and plot in ThreeJs. I referred the below article and created a converted (refer code below)
Article: Calculate distance, ...
0
votes
0
answers
281
views
WGS_1984_UTM_Zone_15N vs NAD_1983_UTM_Zone_15N
I recently ran into an issue where my client's project data was presenting correctly in ArcGIS Pro (abutted correctly, correct location relation to aerial), but was shifting several feet when I opened ...
0
votes
2
answers
212
views
Convert centroid data to lat/long coordinates
I have a geoJSON file from Alameda County, California, that says it is based on "crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:...
0
votes
0
answers
285
views
EGM96 5' geoid model .tif file
Where can I find a .tif file of the EGM96 geoid height above the WGS84 ellipsoid with 5' resolution ?
I am working on converting vertical datum on different kind of files from WGS84 to EGM96 and surch ...
1
vote
1
answer
109
views
WGS 84 terrain import to SketchUp
I am trying to create a 3D terrain map in Sketchup, based on a DEM file from the UK LIDAR series. I can add the DEM to QGIS as a raster layer and then use DEMto3D to produce a mesh in .stl format ...
1
vote
0
answers
57
views
QGIS rendering weird line segment offset for geographic coordinates
I'm seeing a weird line segment offset in QGIS when comparing a single line segment specified with geographic coordinates (EPSG:4326) to the same line using UTM coordinates (EPSG:32734).
I start off ...
0
votes
0
answers
31
views
QChainage only creates points using None/Planimetric measurement
I am using the QChainage plugin to make points every 1 nautical mile on a line set to CRS of EPSG 4326. My project measurements were set to Ellipsoid - WGS 84 (EPSG: 7030) in order to match Google ...
1
vote
0
answers
881
views
Get height above ellipsoid (HAE) of the surface of the Earth given a lat,lon coordinate?
I am looking for a way to compute the approximate HAE (height above ellipsoid of WGS84) of a point at the surface of the Earth at a specific latitude and longitude. Is there a simple way to get this ...
0
votes
1
answer
401
views
Where do I find the grid file "Und_min1x1_egm2008_isw=82_WGS84_TideFree.gz"?
I want to download the file Und_min1x1_egm2008_isw=82_WGS84_TideFree.gz.
I went to https://earth-info.nga.mil/index.php?dir=wgs84&action=wgs84
and downloaded under Data/Apps -> EGM2008, this ...
4
votes
2
answers
2k
views
How to convert wgs84 from ellipsoidal height to mean sea level i.e. height above goid, with pyproj?
I want to convert wgs84 coordinates with ellipsoidal height to wgs84 coordinates with height above goid. Therefore I have set up a new conda environment and installed pyproj, proj_data, see conda list ...
3
votes
1
answer
150
views
QGIS input coordinate precision
I imported a point geometry layer into QGIS using a delimited text file (CSV) that contained the latitude and longitude values projected in CRS WGS84-EPSG:4326 with 6 decimal places (e.g. 38.145695). ...
0
votes
1
answer
928
views
Finding the correct UTM zone for set of coordinate in R
I have a set of points (coordinates) which is in WGS84 UTM but I don't know the zone to convert it to Lat/Lng to be able to put it on the map !
I was wondering if there is a way of extracting the zone ...
1
vote
1
answer
795
views
Incorrect WGS84 to UTM conversion in GeoPandas to_crs and estimate_utm_crs
Does anyone ever encounter this weird inconsistency in GeoPandas to_crs and estimate_utm_crs:
import utm
import numpy as np
import geopandas as gpd
from shapely.geometry import Point
for lon in range(...
3
votes
1
answer
91
views
Interactive calculation of object area depending on its location in the UTM zone using QGIS
I want to interactively calculate the area of a geometric object and use different projections depending on its location.
Source data is stored in WGS 84.
The area should be calculated in the WGS 84 ...
3
votes
3
answers
222
views
Coordinate system to be used with qgis2web (QGIS to Leaflet)
For my project in University I want to create an interactive map. My Prof told me, Leaflet only uses WGS84, but he wasn't sure. When using the qgis2web plugin, should I have WGS84 as project ...
4
votes
4
answers
740
views
Difference between converting a projection into WGS84 first before converting it to a intended coordinate system vs. converting projection directly
I have an assignment that required us to convert projection using two different method. First method, convert directly from current coordinate system (Kertau_RSO_Malaya_Meters) into GDM 2000 Johor. ...
1
vote
1
answer
1k
views
Lat/lon after moving x meters to a specified direction
I have recently been working with coordinate systems in Python with pyproj package. I'm facing the following problem: I know my current position from a GPS receiver as EPSG:4326 latitude/longitude ...
2
votes
1
answer
541
views
Convert image from EPSG:4326 to EPSG:3857
I'm new to GDAL and map projections, I need to convert equirectangular (EPSG:4326?) projection to "pseudo Mercator" (EPSG:3857?) projection used by 90% web-based maps (which is simple this 0/...
2
votes
0
answers
214
views
Convert EPSG and vertical datum of a DEM file
I have DEM files that are in EPSG:4326 - WGS 84 and use latitude and longitude for coordinates. The elevation units are in meter but use the WGS84 ellipsoid with WGS84 elevation. I want to convert ...
1
vote
2
answers
236
views
Slope calculation with datasets in different CRS
I have a shapefile containing several zones. This file is in CRS EPSG:32644 (WGS 84 / UTM zone 44N).
I have a DEM file (originally in CRS EPSG:4326 - WGS 84) that I converted to EGM08. The elevation ...
1
vote
0
answers
72
views
Setting negative DEM values for the sea and water bodies to zero
I've downloaded a few of the Cartosat-1 CartoDEM Version-3 R1 files from BHUVAN (https://bhuvan-app3.nrsc.gov.in/data/download/index.php).
The files seem to be in the WGS84 format and have values of -...
1
vote
1
answer
274
views
Find local plane basis at a location using WGS84
I have orientation data from a drone given as a quaternion with respect to the local reference system (Z is up, X is local east, Y is local north) which is the local tangent plane. I want to express ...
0
votes
0
answers
137
views
Error in WGS84 to Mercator coordinate transformation
I'm trying to convert the (lat,lon) of WGS84 into Mercator (x,y). Below I've listed all the relevant information given in the file.
Datum="WGS84"
Ellipsoid="WGS84"
...
1
vote
3
answers
2k
views
Is EGM2008 different to WGS84 ellipsoid?
I have a DEM dataset which describes the vertical reference used as "height above the WGS84 ellipsoid".
As I understand it this assumes vertical values to have MSL as a reference and NOT ...
2
votes
1
answer
271
views
Publish UTM from geoserver using mssql geometry
I have my world lat, lon coordinates insert in an ms sql geometry column like this:
geometry::Point(56.120417, 10.159337, 0);
I have an ms sql store in geoserver and a layer that exposes these ...
0
votes
1
answer
1k
views
Difference between WGS84 datum and WGS84 UTM 15N [closed]
I have two digital elevation models. One’s datum is in WGS84, and the other datum is WGS84 UTM 15N. I am using both for geologic mapping.
What’s the difference between the two datum?
Is it okay for ...
1
vote
1
answer
370
views
Converting elevation between NAD27 and NAD83
I am working with a large dataset which has datum in NAD27 and NAD83. I needed to convert the northing and easting coordinates with the NAD27 datum to NAD83 datum using Geopandas, which I was able to ...
1
vote
0
answers
196
views
Transform latitude and longitude to Transverse Mercator
I would like to transform point in WGS84 lat lon to Transverse Mercator:
+proj=tmerc +lat_0=0 +lon_0=114 +k=1 +x_0=-49099.65399999998 +y_0=-2544749.4072 +ellps=WGS84 +units=m +no_defs
I could easily ...
2
votes
1
answer
126
views
DGPS data and concerns about WGS84 accuracy
I am using a DGPS unit to collect data points at an average accuracy of about 30 cm using QField. My data layers are in WGS84, which, I believe has a much more limited accuracy (QGIS tells me about ± ...
0
votes
0
answers
520
views
How to convert EPSG:4326 point to X,Y tile coordinates
I'm trying to convert my geometry points in SRID 4326 I have stored in my DB to obtain tile coordinates (X,Y) for a given zoom level.
I've been doing it in my node server like this:
function long2tile(...