An angular geographic coordinate that specifies the north-south position of a location.
1
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1answer
76 views
find euclidean distance in GPS [duplicate]
i need to find the distance between two gps location, So i think to do this:
lat1(seconds)-lat2(seconds)=lat * 30.7151 == distance latitude in meters =Latm
long1(seconds)-long2(seconds)=long ...
1
vote
1answer
150 views
Lat Long line intersecting with circle
Can anyone help me what's the algorythm to calculate points of intersection whet is given one point p1 [lat,long] , bearing x (let say 137 degrees), arc center [lat,long] and radius?
I woulde like to ...
1
vote
1answer
241 views
USA Contiguous Albers Equal Area Conic
How do you convert from USA Contiguous Albers Equal Area Conic to meters? Or, to latitude and longitude?
I am using ArcGIS 10.1, and within it, ArcMap. The shapefile I have reports the coordinates ...
1
vote
1answer
101 views
Accurate and fast nearest neighbour, which distance function should I use and how to it speed up? [duplicate]
I am solving the following problem:
I have a map with many points in it and I need to find the nearest point to given location. Each point carries information about it's latitude and longitude. This ...
1
vote
2answers
495 views
How to make distance calculated using Latitude and Longitude more accurate
I'm coding a Web App whereby users can choose their city (start) and a destination city, and find out the approximate distance between both cities, using Latitude and Longitude of both cities to ...
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 ...
1
vote
1answer
130 views
What format is lat/long stored in OSM PostGIS?
Question:
How do I to get the lat, long for all the toll booths stored in OSM for Virginia?
Current Query:
> gis=# select * from planet_osm_nodes where ('toll_booth' = ANY(tags));
id ...
1
vote
2answers
103 views
Does it make sense to create graticules using UTM meters?
Here's what I think I know, but I'm a geography newbie, so please correct any misconceptions I have, especially with regard to the term graticule.
A graticule is a specialized grid where the lines ...
1
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1answer
546 views
How to convert Lat & Long from Onemap.sg to Google Maps
I have a set of address for Singapore, I would like to take the Lat & Long from onemap.sg (SYV21: X, Y / Easting, Northing) and then store it in my databse , convert into (WGS84: Longitude, ...
1
vote
1answer
769 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 ...
1
vote
1answer
1k views
How to add longitude / latitude to a world map in Mapinfo professional?
I am a novice in Mapinfo Professional. I have imported a shape file of the world map into MapInfo. It's projected as Lambert azimuthal equal-area projection (ETRS89). Is it possible to show the ...
1
vote
3answers
443 views
Finding X, Y of nodes in feature layer
I have a map document in ArcMap and I want to find X and Y of my nodes in a special feature layer. I look through my access database and I just find the Shape Index table which has MinGX, MinGY, ...
1
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0answers
46 views
Using gdal to convert from UTM to equidistant lat/lon
I am getting rather confused with converting a UTM gridded dataset into a equidistant/rectangular latlon gridded dataset. Can anybody help me?
I have a UTM set with the following projection:
...
1
vote
0answers
127 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 ...
1
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0answers
96 views
Google earth incorrectly rendering coordinates?
My circles are rendering funky on the poles, and along the equator.
Here are my coordinates:
158.05553767833,-78.151355482613
152.68654993135,-76.924955252783
147.72303124605,-75.713526831152
...
1
vote
0answers
23 views
Translate geographical coordinate [duplicate]
Possible Duplicate:
Calculating Lat/Lng X miles from point
I would like to know how could I translate a geographical coordinate to an specific distance. So for example let's suppose I'm ...
1
vote
0answers
104 views
Calculate Point C using distance and bearing from points A and B? [duplicate]
Possible Duplicate:
Calculating Lat/Lng X miles from point
I'm from old school so have not done math for ages. So I need some help to solve this problem, please :)
I have two points such ...
1
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0answers
314 views
mixing lon/lat and mercator layers in a MapServer .map file
I have a basic question about my MapServer .map file, which has two layers, each with a different coordinate system, longlat vs. mercator.
See my .map file below. If I leave it as shown below, with ...
0
votes
1answer
99 views
If the Earth was flat, what unit of measurement would distances between geographic points be represented as?
A whole lot of abstraction- given two longitude/latitude points given from a GPS, I'm using the Pythagorean distance formula to find the distance between them. What unit of length would the distance ...
0
votes
1answer
40 views
error in estimate distance?
i do some experiment place two sensor node between them 4 meter as distance.
then i get these GPS information:
node1: Latitude: 32, 33.255 , Longitude: 36, 0.6632
node2: Latitude: 32, 33.228 , ...
0
votes
2answers
64 views
Getting a “square” of lat/lon for database query [duplicate]
So I want to get the square formed by a single point of lat/lons, my plan was to take that point's latitude, divide by 360, and multiply by the circumference of earth. Giving us the distance from the ...
0
votes
1answer
36 views
Does anyone know of an explicit formula that I can plug-n-chug with to convert WGS84 lat lon to kilometers or miles? [duplicate]
I have a lot of lat lon coordinates in WGS84 format and I'm trying to get those into kilometers so that I'm able to calculate distance.
0
votes
1answer
301 views
How to convert Singapore Onemap Co-ordinate to Google maps co-ordinate system
I have to fetch few 3000 co-ordinates (I am Geo-coding ) and convert it into Google map co-ordinate system.
Following is the process I am doing
I am calling Mapone.sg API for geo-coding in return ...
0
votes
0answers
27 views
A machine to measure latitude to 6 decimal places of a degree [duplicate]
I am doing a PhD research project to do with medieval and ancient archaeoastronomy which requires me to be able to measure latitudes up to an accuracy of 6 decimal places of a degree of latitude. ...
0
votes
0answers
53 views
Long/lat to tile row and column for a certain layer on EPSG:900913
I have a bunch of XYZ layers rendered in OpenLayers. I want to give a lon, lat and Z value and the system would return the X and Y location of the tile of that XYZ layer.
I found the following 2 ...
0
votes
0answers
26 views
Simulating Random Movement Google Maps [duplicate]
Hi i have a pair of longitude and latitude coordinates and i would like to make a marker move on a map the path that it moves should be randomly generated however i want the marker to move 1 km every ...
0
votes
1answer
122 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 ...
0
votes
0answers
43 views
Offset a Polygon defined in Lat Lng points by a given distance of miles or km
I am trying apply a positive offset/buffer (enlarge a shape equally from the borders) to a polygon that is made up of a series of latitude/longitude coordinates by a distance that is defined in either ...
0
votes
1answer
49 views
Shrinking the co-ordinates into a unique number
I have a bunch of data's in my gpx files. I would like to shrink those bulk data's(co-ordinates) into a single ID or sort of something. any suggestions?
0
votes
0answers
61 views
How to convert ISO 6709 cordinates?
I would like to convert ISO 6709 coordiantes to string ?
For example
Latitude: 1002.0672 N
Longitude : 07624.1767 E
Can you provide Java function ?
I go through it , but didn't get the answer..
0
votes
0answers
15 views
Using PostGIS to create a grid map and count points in grids [duplicate]
Possible Duplicate:
How to create a regular polygon grid in PostGIS?
I'm trying to divide the map of an area into 1 km x 1 km square grids and ultimately, count and retrieve how many points ...
0
votes
0answers
49 views
Calculate XYZ velocities between 2 ECEF points [duplicate]
Possible Duplicate:
How do I calculate ECEF X,Y,Z velocities for GPS if I have no satellites
If I have a starting location (Latitude/Longitude), a bearing (degrees), and a speed (m/s), how ...
0
votes
0answers
52 views
Caculating Longitude and Latitude for Moving Object [duplicate]
Possible Duplicate:
Calculating Lat/Lng X miles from point
I don't know how to ask the question, so I'll explain my requirments -- I hope I'm in the right site :)
Let's assume that a ...
-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 ...
