# Tagged Questions

Angular geographic coordinates that specifying the north-south and east-west positions of locations.

15 views

### Geographic movement in c# [on hold]

I'm programming an game app by c#. I want to calculate movement of objects in app screen. For example I want to know if my object move from a source to destination (using their latitude and longitude) ...
19 views

### Associating a specific location to the appropriate street centerline

I need to determine which street centerline within openstreetmap is the best match to a particular location triggered by capturing a location's lat/long via a mobile device. So far the best I could ...
29 views

### Longitude difference to Meters

I have been trying to find an effective method (be it an equation or table filled with values) that would be useful for converting differences in longitude values into a distance in kilometers. It ...
29 views

### How can I compute global triangulation from longitude/latitude coordinates?

I want to calculate an approximate location based on these inputs: 3 locations identified by latitude and longitude anywhere on a planet 3 angles, indicating the approximate direction from each of ...
98 views

### How can I convert the following coordinates to something I can put in Google Earth?

I've tried converting the following lat/long data into Google Earth but the intersection doesn't show up on my map when I try entering them. What does N87° 40'20"E convert to? What does N1° 49'33"W ...
36 views

### Converting polyline coordinates to lat/lon for use in google maps

I am given an ArcGIS polyline (or polypoint) from a WFS service (e.g. 1693669.5143, 5672605.5392), and am looking for a function (python, java, whatever) to convert it to a lat/lon so I can use it in ...
61 views

### Calculating distance between latitude and longitude Python and CSV

I wanting to compare the distance between two sets of lat/long and I need help inputting my lat/long fields into the Haversine formula. I am able to print my two sets of lat/longs (print floats1, ...
23 views

### Axis Orientation is inverted in openlayers 3

I'm new using the Openlayers, I am creating a map with custom coordinates coming from a post, the image for the map is a static image, like a floor plan. The coordinates that i'm getting is only 'X' ...
269 views

### Verifying formula that will convert longitude 0-360 to -180 to 180?

I have a netCDF file that contains climate data in a Gaussian grid. The longitudes are given from 0 to 360. I need to convert this to -180 to 180. Is this the correct formula - If longitude is ...
33 views

### Transform Lat/Lon to LCC and vice versa

I need to convert lat/lon to meters as the unit of measurement to do some calculations. I found this online tool to transform my data from GEO_WGS84_Lat-Lon to LAMGe (LCC). This works for me but I ...
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### Converting coordinates into Longitude/Latatitude form that CartoDB understands?

Does anyone know how to convert this infomation into longitude/latitude coordinates for georeferencing on cartodb? UTC: Posn: 03:00N – 105:10E LT: Posn: 01:28.0S – 116:48.0E LT: Posn: 08:44.7S - 013:...
55 views

### ESRI ASCII. Latitude and longitude in a in raster

I've started a new project that involves a ESRI ASCII grid. As far as i know it is a map of Germany or the UK (I'm not sure which one). This is how the header looks like: NCOLS 8083 NROWS 12952 ...
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### Convert and plot python basemap and netCDF file in UTM zone 45N

I have a netCDF file with precipitation output for one year. I have a problem with aligning the basemap and netCDF file, and plot them in the same coordinate system. The netCDF file covers the ...
36 views

### get lat/lng of an object X inches from the GPS

I'm working on a project where I have a gps and two receivers to create a triangle with a transmitter. The problem I'm trying to figure out right now is how can I get the position of the two receivers?...
48 views

### float() argument must be a string or a number, not 'zip' Python

While running the basic example of cKDTree, why I am getting the error again and again. from scipy import spatial x, y = np.mgrid[0:4, 0:4] points = zip(x.ravel(), y.ravel()) tree = spatial.cKDTree(...
33 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 ...
24 views

### How to store aerial photo or image with geographic data?

I started working with geographic aerial photos and I'm wondering if there any widely spread image or data format that carry metadata like lat-long for each image vertices or something like this. It ...
43 views

### CRS with Latitude and Longitude the same way round as Google

I have a set of data with Lat/Lon co-ordinates taken from Google Earth, I've converted the co-ordinates into WKT using a short formula in a spreadsheet, converted to a csv and imported. Unfortunately ...
186 views

### Using geometry or point for postgis

I have a table with points that has lon/lat, i am adding postgis to my app. I am doing some tests and I found type POINT and type GEOMETRY. I want to convert my columns lon and lat to a point. For ...
47 views

### Storing Lat Long Ranges in Tables

Has anyone tried to store nation-wide lat/long ranges as a look-up table? For example: If you had a polygon dataset that covered the entire US (for example, county polygons). And you wanted to look ...
731 views

### What format is a location represented like this?

While converting an old system, I came across a position column with values in a format like this: 38RQT6410550656 While I've never seen global positioning represented this way, putting this in ...
87 views

### How to convert a Shape (SDE.ST_GEOMETRY) to Latitude and Longitude?

A table Oracle have a Shape field of type SDE.ST_GEOMETRY, I want to convert it to latitude and longitude. I need the Latitude and Longitude to build dynamic maps on Google Maps. I saw on the ...
76 views

### Converting KML coordinates to Leaflet

I am trying to convert a Google Map KML file to a csv, to map the longitude and latitude points on Leaflet. But the coordinates keep mis-projecting and some end up off the land mass. The steps I have ...
21 views

### how to show gps laltitude/longitude in input in android application (webview)

i devellop an android application with , jiquery mobile 1.9, cordova 2.4 ....., i want to display the coordonnate of gps (lot,lat) in input like in the pictures,i'm tired with this code but it cant ...
45 views

### QGIS Lat/Long Postcodes Coordinates Being Placed Out At Sea?

I've read plenty of posts on this site regarding coordinate systems but none of them have helped solve this issue. I'm using Ordinance Survey Lat/Long coordinates for postcodes but a small number are ...
60 views

### Latitude/Longitude to city and zip, batch convertion

I have ~10 mln lat/lon points, and I need to extract city and zip code from them. I can do this with OpenStreetMap using the Nominatim API (using something like http://nominatim.openstreetmap.org/...
27 views

### Getting latitude and longitude in decimal degrees from DEM-raster in UTM

I have a digital elevation model (details: ~4300 cols x 3600 rows, cell size 10 m x 10 m, tiff format, projection: WGS1984 UTM, false_easting: 500000, false_northing:0). I would like to have 2 ...
43 views

### SRID and lat long values

I am using the following query to generate the lat long values SELECT NAME, ST_X(ST_Centroid(ST_Transform(geom, 4326))) as longitude, ST_Y(ST_Centroid(ST_Transform(geom, 4326)))as latitude from ...
28 views

### Request long/lat precision and request too slow [closed]

I've a PostGIS DB of 18Gb. The tab node (id, tags, geom) is very huge and I need to request long/lat on this table but it's very long when I'm using this sql request : SELECT * FROM nodes WHERE geom ...
43 views

### Longitude latitude for each pixel of Tiff Image [duplicate]

I have a project to do and at the moment i have 2 tif images and their geografic data(longitude latitude) of their upper left pixel.What i want to do is get the common geografic place of the 2 images.....
49 views

### retrieve rectangle from a latitude and longitude coordinates in FME

I wanted to retrieve a rectangle with FME from two points (point 1: latitude and longitude and point 2: latitude and longitude) that are stored in the postgres database in text fields: text field 1 = ...
25 views

### Is there a well-known way to compare the relative accuracy of 2 latitude/longitude results?

I have 2 geocoding results (in latitue and longitude) for a given address from different services. I'm interested in describing the results in relation to one another in terms of relative accuracy and ...
27 views

### Best way to get max distance between a pair of nodes in a static set

I need to find the maximum distance between a set of nodes (given Lon/Lat coords). Currently, I'm looping through every combination of node and if the distance between those two nodes is greater than ...
137 views

### How can i convert the coordinates (latitude,longitude) to X,Y using postgis

I want know how i can convert the latitude and the longitude coordinates of a rectangle in the Cartesian coordinates, so I can store them in a geometry field using postgis.
33 views

### Mapping Longitude and Latitude to US state

Is there any database (Gov data or private) or web service that map Longitude and Latitude to US state? I have the specific Longitude and Latitude of a location and would want to identify the state ...
26 views

### How to resolve a rectangle with know points? [closed]

How do I find the coordinates(lat, lon) for D and E in the following rectangle? I know: A (lat, lon) B (lat, lon) C (lat, lon) AE, BE, AC
162 views

### How to identify a series of Longitude and Latitude coordinates for a building? [closed]

I have hundreds to thousands rows of data that includes the GPS coordinates of the specific location (includes building footprint and outside the building within the property survey boundaries as well ...
24 views

### Precision of marker being placed on polyline

I'm attempting to place a marker on a polyline between two lat/lngs at a given percentage. Now, I know I can do this with google maps, but I need to be able to calculate it in backend code and return ...
114 views

### Are speeds in GPS data obtained by detection or calculation?

I have been doing a study into taxi behavior with its GPS data. I could calculate taxi's mileage by either longitudes and latitudes or times and speeds in the data. Since there are several errors in ...
72 views

### Export CSV from CartoDB with lat and lon?

If you create a point dataset in CartoDB then export it to CSV, you get a "the_geom" column in the WKB format. How do you get individual lat and lon columns?
183 views

### How can I make QGIS interpret coordinates as long-lat instead of lat-long

I am working with the TRMM 3B31 files on precipitation provided by NASA. When I load them on QGIS selecting the WGS84 projection together with other shape files the maps are displayed vertically, i.e. ...
47 views

### Change xy to lat long and vice versa

How could I get the lat,long of an object by knowing its xy values(in meters) from my vehicle (assuming it is(0,0) the center)? For example my vehicle lat,long is 30,31 but it's xy values are always ...
67 views

### How to get, then export as .csv the lat lon centroids from shapefile layer

I have a shape file with a whole lot of regions on it. I need to find the centroids for each of these regions in the shapefile (as latlons) and export this as a .csv I have done extensive research, ...
281 views

### Convert longitude/latitude to pixels on the map

I have a map from here. I want to be able to simply convert arbitrary lon/lat pair to pixels on the map (also the ability to do reverse conversion). The maps come with .tfw file and projection info, ...
36 views

### What is the format for OSM lat/lon in .osm/.osh files and how to import correctly into PostGIS?

I've been having issues converting OpenStreetMap geometries to valid points in PostGIS. MY PostGIS table has the this definition for the geom column: SELECT AddGeometryColumn('node','geom',900913,'...
193 views

### Convert PLSS (Section, Township, Range, Meridian) to Latitude and Longitude using R package or Python

I have data in the form of Section, Township, Range and meridian. I have 300,000 data points from all over the USA. Is there any way i can write R or python scripts to batch convert all the points to ...
23 views

### How do I find whether a line is intersecting a circles with small radius on earth?

Algorithm mentioned in how-to-pick-up-line-segments-which-is-inside-or-intersect-a-circle seems to be working fine for circle with radius > 50 miles. But when coming to circles with radius < 50 ...
61 views

### PostGIS - st_intersects using polygons that cross antimeridan/equator

New to using PostGIS and have two situations that I'm working with. In the one case, I have a polygon that crossed the antemeridian and was detecting whether a two separate points located within that ...