Tagged Questions
0
votes
1answer
30 views
Wrong object size after projecting spatial data from one coordinate system to another
I am having problems reprojecting items in ArcMap 10.1 from British National Grid To WGS84. (WKID: 27700 Authority: EPSG to WKID: 102100 Authority: ESRI)
All Polygon Layers I project [I use Project ...
2
votes
1answer
76 views
Find projection of a point to a 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) ...
1
vote
1answer
68 views
Projection WGS 84 is slightly displaced referring to a hillshade in QGIS
I have a hillshade and a vector layer. The vector layer is slightly displaced referring the hillshade. About lat=100m and long=175m
The CRS of the project is EPSG:3397 - PD/83 / Gauss-Kruger zone 4.
...
2
votes
0answers
83 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 = ...
1
vote
1answer
874 views
How to Project shapefile from NAD 1983 UTM Zone 12 to WGS 1984 UTM Zone 13N?
I have a question and I have a shapefile that is in NAD UTM Zone 12 and Datum is North American Datum of 1983.
What I would liket to reprojection it to NAD 1983 UTM Zone 13N and change the Datum to ...
0
votes
2answers
801 views
6
votes
1answer
600 views
Python script to convert Lat Long to ITM (Irish Transverse Mercator)
I am currently working on a python script that converts Lat Long (WGS84) to ITM. The formulas used are based on a paper published by OSGB (Appendix B):
...
4
votes
1answer
761 views
Distances in {Plate Carrée projection - EPSG:4326 - WGS84}
So,
"4326 is just the EPSG identifier of WGS84" [3], indeed http://spatialreference.org/ref/epsg/4326/html/ says it is a GEOGraphic Coordinate System:
GEOGCS["WGS 84",
DATUM["WGS_1984",
...
1
vote
0answers
237 views
Conversion From Transverse Mercator To Longitude & Lattitude
I have to transform (7-parameters datum transformation) coordinates from northings & eastings to lattitude & longitude.
Following are details of source coordinate system(i.e. northings & ...
5
votes
2answers
1k views
How is EPSG:4326 data 'projected' in a 2D map?
I like to think I'm relatively well-versed in datums, projections, and coordinate reference systems, so if this is a stupid question I will suffer eternal shame.
OpenStreetMap data is stored in WGS84 ...
15
votes
5answers
5k views
Map projection in OpenLayers
I want to overlay some data whose projection is WGS-84 on Google map layer in OpenLayers. But I just can't make them in the right place. I did as follows:
map = new OpenLayers.Map('map', {
...
3
votes
1answer
721 views
Matching ArcGIS and QGIS coordinate systems
I have the following info for a feature class in ArcGIS that is supposed to be in WGS 1984/UTM 16N projected coordinate system:
Projection: Transverse_Mercator
False_Easting: 500000.000000
...
2
votes
1answer
2k views
Converting Lambert Conformal Conic to WGS84 using Proj.4
I am attempting to transform data from Lambert Conformal Conic lat/long and I am having some issues with the results.
The shapefile I am attemtping to transform can be found here: ...
