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
4
votes
1
answer
5k
views
Transforming UTM layer to WGS using QGIS?
I am trying transform a UTM layer to a WGS.
I have already:
Saved it as a new layer changing the SRC
Tried the tool "define current projection"
I am using QGIS 2.14 and the original layers are in ...
- 697
2
votes
1
answer
1k
views
How can I improve alignment between google maps and overlays coming from a different coordinate system?
After some work, I managed to extract some PNGs out of a GIS we have at work. This GIS has some polygons in which addresses are surrounded by them. I managed to create an extractor in Python and to ...
- 18.9k
1
vote
0
answers
527
views
Transforming azimuthal to wgs projection using Python?
I want to plot a circle around a given lat/long with a certain radius on the Earth. The shapefile of the earth has WGS84 coordinate system.
First, I projected the circle to azimuthal equidistant map ...
- 11
1
vote
0
answers
2k
views
Convert locations from ECEF NED (local coordinate system) to WGS 84 (global coordinate system)
I track relative positions to known fixed reference location (Lat/Lon/Alt on WGS 84).
Which means Location_0 is the above reference location, and Location_i is something like (X,Y,Z) relative by ...
- 1,809
2
votes
1
answer
3k
views
Guessing unknown projection in Malaysia
I have a database of northings and eastings of boundary markers of land parcels that are in a form that I cannot pin on any format. I would like to perform some conversions on them so that they can be ...
- 76.7k
2
votes
2
answers
18k
views
Convert WGS84 coordinate to Google Map coordinate system (EPSG::3785) with GeoTools and Java
Could you please point me out where can I make such a transformation:
Convert WGS84 (EPSG::4326) coordinate to Google Map coordinate system (EPSG::3785), and vice versa.
- 13.4k
2
votes
0
answers
407
views
Plotting latitude and longitude coordinates (from Bing Maps) in ArcGIS [duplicate]
I have an excel spreadsheet containing latitude and longitude values for a set of businesses. I want to plot the businesses in ArcMap. I was told the latitude and longitude values were obtained from ...
- 12.1k
2
votes
0
answers
382
views
Projection discrepancy with GDAL (1.9) and proj4
I boiled the problem down to that Python example:
import sys
try:
from osgeo import gdal
from osgeo import osr
except:
import gdal
import osr
if __name__ == '__main__':
version_num = int(gdal....
- 13.4k
1
vote
0
answers
428
views
a localised 2D coordinate system from GPS coordinates
I spend a few days reading about coordinate systems, map projections, datums, etc. Since I am new to gis, I am not confident I am doing this right.
Problem at hand:
I have a GPS device that gives ...
- 65.2k
1
vote
2
answers
627
views
Fix leaflet script in order to change coordinate projection
I have a leaflet script which using ziped shapefiles to add it on the map. The shapefiles are in epsg projection 31700 (dealul piscului 1970) and the position on the openstreet map is not correct, so ...
- 350
2
votes
1
answer
242
views
Reprojecting points in NAD 1983 to LLA (WGS84)?
I've read documentation about using NAD_1983_To_WGS_1984_1 for the entire North American continent or NAD_1983_To_WGS_1984_5 for the 48 contiguous United States but what I'm confused is how can I use ...
- 10.3k
5
votes
2
answers
3k
views
Geotools: unexpected difference between CRS.decode("EPSG:4326") and DefaultGeographicCRS.WGS84
I wanted to use geotools (15.3) to reproject data from EPSG:4326 to a local projection. To see if everything works as expected I printed the length of two test linestrings. The expected result is ...
CommunityBot
- 1
2
votes
2
answers
3k
views
Is it possible to change a Geotiffs CRS?
I have created a Geotiff from the Bing Aerial photography.
As it is automatically in WGS 84 it inserts perfectly into QGIS, however this image is of no use to me outside of QGIS.
I need to convert ...
- 13.4k
16
votes
4
answers
40k
views
How do I calculate the bounding box for given a distance and latitude/longitude
I need to be able to calculate a bounding box or circle for a given WGS84 latitude and WGS84 longitude, and distance but have no idea where to start!
The distance from the start Lat/Lon would be 10Km ...
- 13.4k
1
vote
1
answer
890
views
WGS84 to OSGB36 relative accuracy
I have dGPS positions collected using a Leica 1200 system (base station and rover) recorded at the same site on multiple occasions over two years (being used to georeference terrestrial laser scanner ...
- 432
2
votes
1
answer
80
views
multiple glitches in rendered rasterfile after reprojecting in QGIS
I reprojected a natural earth raster file (Natural Earth II with Shaded Relief, Water, and Drainages, CRS WGS84) with a costum CRS (azimuthal orthografic) using Raster->Projections->Warp in QGIS. ...
- 101
1
vote
1
answer
2k
views
What is the formula for converting from WGS84 to EPSG:3071 (Wisconsin Transverse Mercator)
I have GIS software that can do this conversion but I need to know the actual formula / math involved. I'm writing code and need to perform a single conversion (WGS to EPSG:3071) so using a library, ...
CommunityBot
- 1
3
votes
1
answer
3k
views
Using Redfearn's formula to convert between WGS84 and UTM?
I have GPS data at 1 point per second for several weeks in WGS84 latitude/longitude form. It was collected using a UBLOX GPS in 2015 in Australia (Zone 55s)
Would it be correct to use Redfearn's ...
CommunityBot
- 1
1
vote
1
answer
631
views
Leaflet JS: Tiles misaligned using WMS resource
in Leaflet JS I instantiated a WMS tile layer object, given a base URL of the WMS service.
The wms service projection system is EPSG:32633 (WGS 84 / UTM zone 33N) and I had to use proj4js to project ...
- 81.5k
1
vote
2
answers
488
views
Using a geotagged jpg in the WGS coordinate system
I am working on software for mapping purposes and ran into a projection issue that is beyond my knowledge of GIS.
The software utilizes longitude latitude for all visual mapping in order to maintain ...
- 18.9k
2
votes
2
answers
591
views
Converting PLUTO coordinate reference system in QGIS?
I am using New York's PLUTO lot data in QGIS for a project.
Right now, the shp file automatically imports with a custom CRS, allowing it to visually line up with a separate layer of subway entrances ...
- 84.1k
8
votes
3
answers
7k
views
Which is the most accurate method of measuring distance?
I aim to analyse the accuracy of the various methods of geodesic calculations (distance between two points on Earth)based on the three assumed models of Earth - flat, spherical & ellipsoidal.
I ...
CommunityBot
- 1
1
vote
2
answers
1k
views
Transforming data from GCS Krasovsky to GCS WGS84?
I am having trouble transforming data from GCS_Krasovsky_1940 to GCS_WGS_1984 in ArcGIS 10.4.1. I'm using the Project tool, but the geographic transformation parameter is left empty and I would expect ...
- 65.2k
3
votes
1
answer
155
views
What system do these coordinates use? (from LinkedGeoData.org)
I have extracted these coordinates from geolinkedata And I don't know what system they are using:
(-15.4400797 28.131791000000003)
What I know is that they correspond with these WGS84 Coordinates:
(...
- 65.2k
3
votes
1
answer
4k
views
Transformation Parameters from ETRS89 (2004) to WGS84
I have XYZ coordinates of a point measured in year 2004 in ETRS89 coordinate system and I need to transform it to geodetic coordinates in WGS84.
Since ETRS89 changes yearly, so do the transformation ...
CommunityBot
- 1
6
votes
1
answer
2k
views
How to transform WRF Spherical Earth to WGS 84?
Weather Research Forcasting Model assumes a spherical earth model with a radius of 6370km. I'm looking to display the data onto the WGS-84 Ellipsoid model as that is the model my system uses for its ...
- 84.1k
7
votes
1
answer
2k
views
R: Return the UTM zone that a WGS84 point belongs to
I'm looking for an R function that might work similarly to this website that will tell you what UTM zone your WGS84 point belongs to.
http://www.rcn.montana.edu/resources/converter.aspx
- 42.1k
4
votes
1
answer
305
views
Issue converting projected coordinates to wgs1984 in Postgis
I'm trying to convert a local PCS (city of Buenos Aires) to wgs1984. Since the PCS is not included in Postgis, I added it to spatial_ref_sys using spatialreference.org (I compared the arguments with a ...
- 65.2k
4
votes
0
answers
452
views
QGIS 3D Globe Plugin Elevation Map Projection
I'm trying to get a map setup using the QGIS 'Globe Plugin'. I've been trying to use the UK Environment Agency LIDAR data as an elevation map. After a bit of puzzling this out I've found that the ...
- 1,398
1
vote
0
answers
132
views
Intersection of 4D Trajectory with 4D Polyeder (3D + time)
I have worldwide small polygons (lat/lon WGS84) for different heights (z-coordinate) for several timestamps (m). I want to store them in a PostgreSQL/PostGIS database as 4D objects (2D polygons + ...
- 8,718
4
votes
1
answer
149
views
Why is my coordinate notation different?
I was working on a project in WGS84, and I was continually adding layers to it. As I was rendering in print composer and enabled grid-coordinates, I noticed that my coordinates were different. It's ...
- 668
1
vote
1
answer
845
views
Resample SMOS dataset using cKDTree and Bilinear interpolation
I have three datasets now. One is SMOS level3 soil moisture dataset which is in EASE grid 2.0 ~25km cylindrical projection. (EPSG: 6933). TRMM precipitation dataset which is in 0.25 degree. SMAP soil ...
- 241
3
votes
2
answers
2k
views
Conversion from WGS84 to UTM NAD83
If all my data is in UTM NAD83 Zone 10 and I get new data in GCS WGS 1984 do I have to reproject the WGS data to UTM NAD83 Zone 10 for it to align correctly or can I just bring it into an mxd that is ...
- 4,131
3
votes
1
answer
514
views
Creating a Line at a Length and Angle in WGS84 - Arcobjects
I need to draw a line at desired length(around 10-20 Km length) and a user entered angle. The map/data uses WGS84 coordinate system. So the measurement is geodesic.
Here are the methods that I tried. ...
- 43.4k
2
votes
2
answers
144
views
preparing GPS coordinates for processing in gis
I'm currently working on a masters in archaeology, using QGIS to examine some palaeolithic sites. I created a database with the site coordinates, which I collected from looking at bibliographies of ...
CommunityBot
- 1
1
vote
2
answers
2k
views
projection from epsg:4326 to epsg:4258
I'm looking for projection functions to convert coordinates in 4326 to coordinates in 4258 and viceversa. Any suggestions?
- 317
1
vote
1
answer
1k
views
Using lat/long NAD83 in XYtool in Arcgis
I have loaded a raster map that uses WGS 84. I want to locate stations/points on this map by using lat/long coordinated from an online map that uses NAD83.
Can I just copy and paste the lat/long ...
- 407
4
votes
1
answer
394
views
Differences in the longitude and latitude between a LiDAR DSM and an optical image
I've downloaded the UK's LiDAR elevation data (see below) in laz format for a specific region (Tewkesbury) from: http://environment.data.gov.uk/ds/survey#/download
From that, a DSM (Digital Surface ...
- 76.7k
1
vote
1
answer
356
views
Where to get world-map images for use in webglearth
I am using webglearth for a 3D earth globe.
I already bought MapTiler, from the same makers.
Now I am struggling with finding different world-map-images with the right projection. I need either WGS ...
4
votes
1
answer
3k
views
Finding projection of point to line?
I have a segment defined by 2 LatLon points(A and B) and a third LatLon point (C).
I need an alghorithm, formulae, or some code to find the projection point of C on the segment AB (call this point D) ...
CommunityBot
- 1
1
vote
1
answer
2k
views
KD-Tree implementation with lat/lon coordinates
I have implemented a KD-Tree that stores coordinates (latitude, longitude). I have also implemented a Nearest Neighbor search algorithm using the Haversine distance.
Will I get correct results (same ...
- 65.2k
4
votes
1
answer
4k
views
How do I figure out the length of polyline features in a feature class with a WGS 1984 coordinate system?
I'm trying to figure out lengths of polyline features in a feature class with a WGS 1984 coordinate system.
Here's code to list lengths:
>>> import arcpy
>>> inFc = r"C:\Users\e1b8\...
- 99
3
votes
1
answer
1k
views
Converting a NAD27 Lambert Conformal Conic custom projection to WGS84 using QGIS
I am trying to convert some points from NAD27 Lambert Conformal Conic (custom projection) to WGS84 using QGIS 2.8.9. I am using the datum transformation parameters for El Salvador published here: http:...
CommunityBot
- 1
4
votes
2
answers
1k
views
Project twitter geo data into WGS84 map
I'm currently working on displaying twitter geo data (currently just long/lat -> cartesian without any analysis).
This is the world map (source: naturalearthdata): http://dl.dropbox.com/u/14747311/...
CommunityBot
- 1
0
votes
1
answer
6k
views
Raster and vector layer in the same CRS don't match
While adding multiple raster and vector layers (and setting them all in CRS WGS84) in QGIS 2.2, they don't seem to overlap. Interestingly enough, only raster files overlap between each other, the same ...
CommunityBot
- 1
3
votes
1
answer
1k
views
Finding the origin in .laz file with LAStools
I obtained a .laz file, which I used lasinfo and las2txt to view the records.
Scale Factor X Y Z: 0.00100000000000 0.00100000000000 0.00100000000000
Offset X Y Z: 22717....
- 1,184
1
vote
1
answer
520
views
Reprojecting: trouble converting MapInfo data to shapefiles in QGIS
I was given a dataset generated in MapInfo. I need to use these files in QGIS, so I imported the .TAB files and saved them as ESRI shapefiles. I then realised the original dataset uses a custom "user ...
- 40.9k
0
votes
1
answer
2k
views
Negative coordinates for WGS84 system are invisible - ArcGIS 10.2
I have a csv file with point coordinates in GCS_WGS_1984 geographic system. I've imported it to ArcMap as a XY file however negative values for West hemisphere are not visible (but ALL records are in ...
- 3,704
3
votes
1
answer
1k
views
Converting GeoTiff to UTM in QGIS is slow?
I am trying to convert a Geotiff from WGS84 to UTM17. In QGIS, there seems to be a super easy way to do this:
First, I input my tiff by clicking add raster layer. This works successfully, as I can ...
CommunityBot
- 1
5
votes
1
answer
6k
views
PROJ4 C++ API: Amersfoort RD New to WGS84
I try to convert between dutch RD New (EPSG:28992) and WGS84 (EPSG:4326) via PROJ4 C++ API.
On the console this works with:
cs2cs +proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0....
CommunityBot
- 1