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

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1answer
41 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 ...
3
votes
2answers
103 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 ...
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1answer
45 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 ...
12
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1answer
692 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 ...
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1answer
41 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 ...
2
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0answers
44 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 ...
1
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0answers
19 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 ...
1
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1answer
38 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 ...
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2answers
43 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 ...
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0answers
19 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 ...
0
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0answers
34 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 ...
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0answers
27 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 ...
1
vote
1answer
36 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 ...
1
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1answer
38 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 = ...
1
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0answers
17 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 ...
1
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0answers
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 ...
0
votes
1answer
82 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.
1
vote
1answer
29 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 ...
2
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0answers
25 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
0
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1answer
87 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 ...
1
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0answers
23 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 ...
5
votes
2answers
88 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 ...
1
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1answer
44 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?
10
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2answers
180 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. ...
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2answers
40 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 ...
0
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1answer
56 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, ...
7
votes
1answer
210 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, ...
1
vote
2answers
33 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 ...
1
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0answers
129 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 ...
1
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0answers
22 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 ...
1
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1answer
52 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 ...
1
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3answers
68 views

Latitude and longitude from .shp file with QGIS

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 ...
2
votes
1answer
74 views

Merging Coordinate (long, lat) to a region(polygon)

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 ...
2
votes
1answer
53 views

Populate lat/long using ogr2ogr

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 ...
4
votes
1answer
150 views

D3: center a map feature using correct latitude and longitude, without rotation?

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 ...
3
votes
1answer
66 views

Retrieve Google Maps API friendly latitudes and longitudes from shape file polygon

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 ...
1
vote
1answer
42 views

How to point out a place in iframe using latitude and longitude

I want point out a place using latitude and longitude in following frame, <iframe width="75%" height="550" frameborder="0" scrolling="no" marginheight="0" ...
1
vote
1answer
132 views

Convert to lat-lon coordinates GDAL

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 ...
1
vote
1answer
255 views

Plot the longitude and latitudes on map using geotools

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 ...
4
votes
1answer
99 views

convert lat/lng to pixel and vice versa

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 ...
1
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2answers
324 views

Calculate the distance between two coordinates (WGS84) in ETRS89

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 ...
3
votes
2answers
221 views

latitude/longitude to linestring or points

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 ...
2
votes
2answers
153 views

How to get an area Latlong geometry directly from google map?

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 ...
3
votes
2answers
48 views

Adding Excel file with degrees to map with CRS in QGIS?

How can I add a layer with X,Y in degrees (from an excelfile) to a map with CRS? I am using QGIS 2.8.2
0
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0answers
22 views

Create polyline at latitude line

I would like to create a polyline shapefile that runs along a line of latitude between two points of longitude. I have been able to create a line by creating a new shapefile, then editing the vertices ...
0
votes
0answers
122 views

Convert XY to Lat Long using SQL?

My organization is creating a 311 mobile app. The backend is all run through SQL and report emails are generated. We are grabbing the xy from the app and then want to translate it to Lat/Long to be ...
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1answer
53 views

Shortest and longest amount of numbers that latitude and longitudinal coordinates may have?

What is the shortest and longest amount of numbers that latitude and longitudinal coordinates may have? For instance i know that London is 51.5072 0.1275. So the first value is 6 numbers and the ...
3
votes
1answer
24 views

Help with Meters at Lat calculation accuracy, two methods

So I'm coding a program (c++), and thing leads to thing, and I need to find out how many meters to a degree of longitude at a specific latitude to a very high precision. Optimally < 1 meter at all ...
5
votes
5answers
276 views

Detecting and fixing outliers in a GPS trajectory

I need to find an algorithm or method that can detect outlier latitude longitude points in a trajectory during post-processing, which can then be fixed (brought back into the trajectory's path based ...
1
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0answers
24 views

Degree Precision vs. Length [duplicate]

https://en.wikipedia.org/wiki/Decimal_degrees I found this chart in one of the questions here. Additional to this: When making a measurement and getting 2 Measures of Latitude, for example ...