Any of a set of two or more numbers used to determine the position of a point, line, curve, or plane in a space of a given dimension with respect to a system of lines or other fixed references.
0
votes
0answers
14 views
Calculating points in the USDA's Cropland Data Layer coordinate system
I need to integrate against the USDA's cropland data layer. They've got a demo and some API docs.
The important query I need to run is this, given an (x, y) of say (1551459.363, 1909201.537):
...
0
votes
1answer
17 views
generate random world point geometries
I have a world map. I need random point geometry. So, how can I randomly generate point coordinates? Any programming language. Also, I am using SRID 4326.
Any programming language.
1
vote
0answers
75 views
convert GPS to XY coordinates
if i have obtain GPS coordinates as Latitude/Longitude, then i need to convert them to XY coordinates, i see this link
actually i need to get the Trilateration , in its equation i need the XY ...
0
votes
3answers
42 views
Openlayers vector feature coordinates are not transforming,
I have a OpenLayers vector with a single feature [0]. It's coordinates are in the map projection (EPSG:3413) and I want them in WGS84 (EPSG:4326) decimal degrees. I have the following code which ...
2
votes
1answer
47 views
Calculate View Angle
I am looking for the most accurate way of calculating the view angle (Azimuth, Elevation) from a reference point (my location) A to another point B. I have the Lat, Lon, and Altitude for each point.
...
1
vote
1answer
38 views
Polygon Nodes do not have separate coordinates [duplicate]
I'm attempting to measure the distance of a series of points from a smaller number of polygons. As a first step, I've changed the polygons into points along their border, via the
Vector> Geometry ...
0
votes
1answer
89 views
convert GPS to x,y using reference node
i am using sensor nodes and their antenna to calculate GPS coordinates as notation of (degrees/minutes/seconds), i have some question of how to do these things:
how can i convert latitude and ...
2
votes
1answer
63 views
Why does QGIS 1.8.0 crash when I try to set up CRS on Win XP?
I have a problem with my qgis 1.8.0. When I click on any button that set CRS or try to set the coordinates on the fly, qgis crash. I try to uninstall the program and re-install it again using ...
0
votes
2answers
38 views
clipping polygons (vector) map with a polygon (vector) layer
A frustrated newbie with QGIS Lisboa version in Windows 7. I want to clip a soil map (multiple polygon vectors) with a single polygon (rectangular polygon vector). The project projection is set at ...
0
votes
0answers
56 views
How to calculate new coordinates by given distance, angle and altitude
I'm using C function to calculate new coordinates by given distance and angle to download google static maps tile by tile to create small map at given zoom. I have troubles because this code works ...
3
votes
1answer
66 views
How to convert these mapping coordinates
I have an older database at work and I've been asked to map the
recorded GPS coordinates for each record. Unfortunately, I can't
figure out the map coordinates that were recorded.
As an example, ...
0
votes
1answer
128 views
Make POINT from longitude/latitude coordinates from existing table in PostGIS
I would like to make a POINT using the longitude and latitude columns of an existing table. Here's a link to the documentation of ST_MakePoint.
Here's my table:
CREATE TABLE sysinst.bio (
oid ...
2
votes
2answers
110 views
Is there a way to populate a spreadsheet of city names with their latitudes and longitudes from Google Maps or some other service?
I have a long list of cities in the United States, and would like to get the coordinates for each city without looking up each one individually. Is there a way to do this?
7
votes
2answers
122 views
How do I group near points with GPS positions?
I'm an IT person so I don't know too much about projections and so on, I hope you can help me.
I have made an application for Android that collects a GPS position, so I have the latitude and the ...
1
vote
1answer
59 views
ROAD COORDINATES Data (CARDIFF)
Does anyone know how to get road coordinates data from openstreetmaps?
I know its possible I just don't know how.
Thank you!!
