Tagged Questions

How do I convert latitude and longitude co-ordinates to British National Grid Eastings/Northings if the latitude and longitude data I have are entirely numbers, with no letters?

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 = ...

I have a list of about a thousand locations, with name, ID and lat/long decimal coordinates. For each location, I want to calculate the 10 closest locations among the thousand, and save the ID and ...

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 ...

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 ...

I've read a lot about this subject the last days, but I can't solve my problem. I have beacons, their locations (lat, lon) are known, and I have an estimated distance (<15meters) due to the RSSI. ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 = ...

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 ...

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 ...

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.

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 ...

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

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 ...

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 ...

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 ...

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?

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. ...

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 ...

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, ...

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, ...

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 ...

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 ...

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 ...

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 ...

I opened with QGIS the shapefile in the following archive http://data.openstreetmapdata.com/coastlines-split-4326.zip and I want to convert this shapefile to a list of latitude and longitude values ...

At present I have sports grant data, coded by longitude and latitude. This data is broken down by amount received, as well as the intended sport. I also have various other data, broken down by ...

I have a shapefile with coordinates listed in Easting and Northing in the attribute table. Is it possible to create two new fields called lat and long and populate them with values corresponding to ...

The following is a map of Chicago which I've created in D3.js, and the JS code to render it. I had a very hard time centering Chicago within my viewfinder (the white box). After much trial and ...

I have a shape file with a polygon in it, and I am trying to the latitudes and longitudes associated with it so I can use them with the Google Maps API. So far I have been working with QGIS Lyon and ...

I want point out a place using latitude and longitude in following frame, <iframe width="75%" height="550" frameborder="0" scrolling="no" marginheight="0" ...

I have a netCDF file and would like to convert it to LAT-LON coordinates. 1) I do not know the projection in the file but from the website of the data provider, the data is on a polar-stereographic ...

I am new to geotools and i find bit difficult to plot a point using the latitude and longitude values. can any one help me out to solve my problem. I tried the following code but not helpful.By ...

This had been asked previously on Stack Overflow. I've tried different methods/formulas but results are not correct. 40.764296,-73.97302 should result into 930,3590 pixel on map image. I've Manhattan ...

I have an Excel-file with coordinates (WGS84). From these coordinates I create a line (shp) and transform it (ETRS89). After the transformation I calculate the distance from point to point. I do this ...

I have a gps file that I have converted to csv, I would like to convert a longitude/latitude to linestring if the next row have a diferent longitude/latitude (if the car mooved) and if not convert it ...

I am new to field of GIS. I need to know that do we have an option of getting latlong of a building that we see in google earth or any Point of Interest areas. Something like i create & drag ...