An angular geographic coordinate that specifies the north-south position of a location.
37
votes
2answers
16k views
How to measure the accuracy of latitude and longitude?
I am very new to GPS stuff. Suppose I have latitude and longitude as 19.0649070739746 and 73.1308670043945 respectively. So now both co-ordinates are 13 decimal places long. But sometimes, I also get ...
29
votes
3answers
4k views
LatLon or LonLat, what's the “right” way to display coordinates and inputs?
I'm trying to get a sense if this is an issue for others or every input/output should be labeled so user is not confused and just go with it?
I think almost everyone pronounces it as "LatLon". Who ...
1
vote
1answer
636 views
How do I calculate ECEF X,Y,Z velocities for GPS if I have no satellites
I'm attempting to simulate a GPS message where know variables are starting location, ending location, speed (m/s), and a bearing (0 - 359 degrees). How can I calculate the ECEF X, Y, Z velocities ...
8
votes
1answer
969 views
How to compute the bounding box of multiple layers in lat/long?
I am writing an application to performance test all kinds of map services, primarily AGS 9.x, AGS 10, and WMS 1.x.
Part of the application involves generating random bounding boxes for individual ...
4
votes
1answer
30k views
Does Y mean latitude and X mean longitude in every GIS software?
Now it's been 3 days I am using Mapinfo and it has Y as latitude and X as longitude. Is that the same case for all mapping software? As for any country their respective value is multiple of 1 or -1. ...
8
votes
2answers
2k views
How do you compute the earth's radius at a given geodetic latitude?
(I see there is an equation on wikipedia that does exactly what I am asking but there is no references. I have no way of confirming the validity of this equation!)
I already understand the difference ...
-5
votes
2answers
723 views
Coordinate Conversion: Decimal Degree to Deg-Min-Sec of lat/long Coordinates [duplicate]
Possible Duplicate:
Looking for a tool to convert DD to DMS
I have two sets of climatic lat/long point data in excel worksheets. One of them is in decimal degrees and another is in ...
10
votes
2answers
1k views
Lon/lat transformation
First I should clarify I don't have previous experience with the field, so I don't know the technical terminology. My question is as follows:
I have two weather datasets:
The first one has the ...
11
votes
2answers
1k views
Why latitude/longitude and not the other way round?
When you google "latitude/longitude" you get 10 times more results than "longitude/latitude". This I find very confusing as "x/y" seems 20 times more common than "y/x". But on a map Latitude is on ...
5
votes
2answers
267 views
What is the origin of the Degrees, Decimal Minutes format?
In my experience, for most non-GIS folks, the most commonly used and understood coordinate system is good old Latitude and Longitude, displayed as degrees, minutes, and seconds (DDMMSS.ss). In GIS, ...
2
votes
1answer
213 views
How can I get the corners of a polygon in latitude and longitude?
How can I get the corners of a polygon -a square/rectangle, to be precise- in latitude-longitude format by using its geom value -or some other way, perhaps-? Thanks.
2
votes
2answers
1k views
Problem when calculating longitude and latitude for points
I have a PostGIS database with SRID=900913 (Google Mercator) and I would like to know the latitude and longitude of points.
I use this command:
ST_X(ST_TRANSFORM(the_geom,4283))
Following what is ...
2
votes
1answer
252 views
Getting zone from UTM in order to convert to latlong
I am trying to convert UTM to a latlong point. To get that done I need to know the zone where the UTM coordinates are. how can I find the zone from UTM?. the place coordinates that I work on lay on ...
2
votes
2answers
464 views
Creating Latitude Grid from DEM
I am trying to evaluate an equation in the raster calculator and I need latitude values. I have the DEM for the region and am wondering if it is possible to create a latitude raster based on the DEM?
...
1
vote
1answer
770 views
How to find bounding coordinates (lat/long) for UTM zones?
I want to error check incoming lat/lng points by checking if the point resides within the given UTM zone. (This would work for the data im using because sometimes there is a missing sign or lat/lng is ...
0
votes
1answer
124 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 ...
