Geolocation is a means to discovering the physical location (in real-world geographic terms) of an object.

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25 views

ArcGIS how to geolocate/georeference raster data arrays?

How does one geolocate (or georeference) a raster of swath grided data with separate lat/lon arrays and multiple data bands using ArcMap 10.3? A sample data file (*.h5) can be downloaded from here ...
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22 views

Working out meter accuracy based on number of visible GPS satellites?

I am working with NMEA data and I curious whether there it is possible to calculate the accuracy, in metres, based on the number of visible satellites or whether there is an alternative way? The two ...
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1answer
58 views

Free API or database for Continent, country, city, region/state?

Is there a database or API that can provide: Continent, country, city and region/state? It should also have the country codes in ISO format. It would also be great if if could all be in one file for ...
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52 views

Using Python-Flask-MongoDB with Geolocation field running on App Engine?

I'm trying to write an app which would act as a address caching API, so basically it needs to store addresses (geolocations) and later on I could query on a random address and radius and get all the ...
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1answer
18 views

Where can I find tower information

I want to find geolocation with GSM Cell information. The device I have can be able to send this data to me. Anyway, I need tower information to find locations and calculate triangulation. I tried ...
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92 views

How to get the best GPS position Geolocation API

I want to get the most accurate position of my mobile phone with android. I'm comparing accuracy value in 2 seconds interval and if value is less than last value I'm trying to keep the position in <...
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21 views

How can I ask for location and display it on map on my website? [closed]

I have added a map to my website. Now I want to add a feature to it wherein when a user clicks on the add event button on the header a popup should appear which ask for event name and location and as ...
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33 views

Points within a circle in Python - geoindex

I'm trying to use the geoindex package to perform a nearest neighbor query. For example, I have this two coordinates (in the real case I have a lot more): (40.607255, -73.75083) (40.7261465 -73....
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2answers
61 views

Generating random points near a location [closed]

In the following solution, why is there a sqrt(u)? Since u is just a random number in [0, 1) doesn't getting the sqrt just give you another smaller random number? To generate points uniformly, ...
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1answer
101 views

Geolocation is not working on my mobile device (USER DENIED GEOLOCATION) - Openlayers 3

I have the Openlayers 3 Geolocation API working on non-mobile browser correctly, but I get 'User Denied Geolocation' error testing on mobile devices. What could be the reasons of this error? If it ...
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70 views

how to transfer GPS device coordinates into mobile android app?

i'm trying to make an android app that collects data field in high accuracy, since the phone native GNSS doesn't provide highly accurate coordinates, i want to use Coordinates provided by a real GNSS ...
3
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1answer
79 views

QGIS geolocate a csv (insert point for each record manually in map)

I have a CSV with data (no location, no lat/long). I need to load that CSV into QGIS and create a point for each feature. I've trying for an hour without success.. I guess there must be a way to ...
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1answer
24 views

Using Gazetteers to mine locations from text

I am starting to work with Gazetteers and trying to find something that will actually "mine" geospatial locations from sets of text. Academically, this is a difficult task as texts are based on ...
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1answer
84 views

Openlayers 3 - click under geolocation layer

I am using geolocation feature of Openlayers 3.13, as in the examples. (http://openlayers.org/en/v3.13.0/examples/geolocation.html) However I also have queryable point layers, and when I track the ...
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1answer
35 views

Searching by location

I need an advice for a service. On our website we have a search for events. Users are especially interested in the location of event so they use that filter a lot but the problem is that in our ...
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1answer
28 views

Where can I find a list with beaches which include coordinates?

I use World Weather Online marine API to get wave height of different beaches. This API provide data by coordinates and I need a list with coordinates of beaches.
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1answer
59 views

Does this DXF file contain geolocation data?

I'm new to autocad and have been sent a file with polylines which I need to plot on a map. However I cannot see that the file contains any geolocation data to plot it accurately. The GeoLocation tab ...
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1answer
48 views

Keep only the last marker when geolocating

I'm working with OpenLayers 2 and I managed to create a javascript to locate the users and it works fine. I added a marker representing the current location and when the position change, it creates a ...
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23 views

Does any maps/directions service provide location caching on server?

I want to store some user's tracked location data on service server and take it later. Something like courier's last location.
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2answers
124 views

How to display geotagged photos in leaflet

There is awsome plugin of displaying geotagged photos in leaflet Photos on leaflet I used the picasa photos implimentation when I implemented the plugin for my picasa public album photos link in ...
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2answers
146 views

Move leaflet polygon to given position

I have a circle and a polygon that I'd like to move to the user's local position. I managed to move the circle latLng but I can't find a way to do the same thing with a polygon. Can someone help me ...
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0answers
50 views

Triangulation of Cell Towers using MSQL Server Spatial

I need to triangulate a GSM Device by using known cell towers locations and GSM readings. All Data is in a MS SQL Server as Geometry Types. herewith an example of the data : here is also a SQL ...
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2answers
77 views

change easy.button to get the location of user

I want to add a button to my leaflet that zooms to the position of the user. i cant figure out the right way. This is what i tried: L.easyButton('<img src="myimage.png">', function(btn, map){ ...
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1answer
58 views

add marker to geolocate button

I'm doing a map to describe trekking paths and I need a button for the geolocation function. I saw ol examples about custom control, button and geolocation, and thanks to the drupal geolocate button I ...
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2answers
192 views

How to find multiple centers of gravity?

Say I have a number of customers in a geographical area, marked "c": Each customer has a Lat/Long. I would like to find x number of points, in the same space, that best serve the customers, ie. ...
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199 views

Get all locations of Panoramio photos in a given extent

To create a visual quality heat map I'm trying to get a list of all Panoramio photos in an about 2000 Km2 wide study area. My idea is to perform a density analysis in GIS on a point shapefile ...
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1answer
44 views

Choosing aesthetic location over physical location?

I am in the process of putting together an infrastructure map for my city. We have received some engineering maps (and CAD files) that are assisting me in my task. I have also gone out and gathered ...
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17 views

Google Earth Mapping in Beijing - Why is it shifted? [duplicate]

When using Google Earth Pro, the road network and the underlying imagery do not line up. At first I thought this was a road network issue. However, when I geolocate addresses using the Baidu ...
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40 views

Positioning new point on line with OSM routing?

I have three tables: ways_vertices_pgr (from OSM Routing, contains road vertexes I use for creating routes and among other things their geometry), routes (geometry) and a table which holds the order ...
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1answer
77 views

Sectors pointing to a lat long [closed]

Is it possible to find which sectors of a site are pointing to a specific lat long at a distance away?
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81 views

Get the altitude for a given geo location with online OpenStreetmap

Is there a simple way to get the altitude for a given geo location? I would like to add a link to our gluon node form, that links to a place, where I can easily retreive the altitude above NHN or ...
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196 views

Getting random coordinates based on country

Are there any webserveices/APIs that can take a country name and return a random coordinates (not including the sea/ocean sections) inside that country?
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1answer
155 views

How to determine when mapview zoom level has changed using Mapbox-iOS-SDK?

I am using Mapbox-iOS-SDK 2.1.2 and I need to know when the user changes zoom level on the map view. I know how to get the current zoom level, but I don't see any delegate methods for determining ...
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1answer
38 views

Creating random points within polygon from database?

Although i have a solution for it in ArcGIS named hawth's tool but i wanted to know whether it is possible in QGIS or not, additionally i am not having lower version of ArcGIS on which i can do my ...
2
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1answer
270 views

Calculate road distance between GPS points

I am working on tracking system that track location of vehicles on the map and tell their total distance from the beginning till today. I have device_id, timestamp and GPS location in the table like ...
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1answer
62 views

Publish a Locator Service with a place-name alias table

I am trying to publish a locator service with support for a place-name alias table, in ArcGIS for Server 10.3. It should function similar to the Esri World Geocode Server which allows users to search ...
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100 views

How to directly get a Google API map based on a cell tower object

How do I pass a cell tower object to the Google Maps JavaScript API or Embed API to get a map for wherever the tower happens to be? I realize that I can accomplish the task in two steps by first ...
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11 views

How to identify features intersecting or near a marker?

Is there an app, program, service or API that can identify features (such as roads, buildings, parks, etc.) intersecting or near a marker? I'd like to achieve both goals -- meaning to both identify ...
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1answer
126 views

How can I get one neighbourhood name using address and/or postal code?

this is my first time here. I just need to get a neighbourhood/locality name, to get it I have the address and postal code (all over Argentina). -no polygons needed- This is to change a background ...
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1answer
223 views

Unable to warp HDF5 files

I have numerous HDF5 files(.nc) which I need to batch process warp using one of the gdal utilities gdalwarp. When I tried to warp the files an error occurred: INPUT: gdalwarp -geoloc -te 109.975 3....
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51 views

Finding proximity to waters, such as lakes, rivers, streams, the oceans

At Alz.care, we are working to detect whether someone who is living with Alzheimer's is nearing a body of water, because of the very high risk of drowning for persons with that neurocogntive disorder. ...
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1answer
95 views

QGIS geolocate a DBF file with another point layer by matching field

I have a DBF table and a SHP with points. I want to geolocate the DBF file using the points layer. Both match in a field called "unificationstring". I know how to do it in postgis but how can this be ...
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1answer
613 views

How can I geocode American rural routes and box numbers?

I am working on a project where users fill out an online form with address information and a Google Map centered at that address is displayed. It works fine for traditional addresses (e.g. 123 Main ...
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11 views

Set of intersection points in trilateration / multilateration [duplicate]

Like in this post I will get a set of points (3 or more) with latitude, longitude and distance (in KM) information to find out the target location. A distance could be about 500 KM. The circles (...
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68 views

project hdf file with geospatial_lat and lon in batch process

Is there any way that I can do a batch process in projecting hdf files wherein I could get and include only the geospatial_lat and lon in the batch script since every hdf file have different ...
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0answers
645 views

Geofencing: Query if a POINT is within a POLYGON

I am trying to use the following query to search if a point is within a defined POLYGON (aka a geofence I want to define): https://spatial.virtualearth.net/REST/v1/data/[DataSourceID]/[...
2
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4answers
102 views

How do some companies receive GPS data from vehicles if GPS's can't send any data?

I know that some companies offer tracking services for vehicles such as live GPS tracking they can access any time, but as you can't use the GPS protocol to send any data i wonder how the do it... I ...
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1answer
318 views

CartoDB detecting user location - putting dot on the map

I have a CartoDB question. Long story-short, we have a project we are piloting in Rio das Pedras, Brazil, a favela near Rio. We have sampling points, working on adding Fulcrum photo uploads and ...
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2answers
128 views

Using LocateButton with Tracking enabled

I have been using esri's LocateButton on a map for almost a year now and it works well. I'm now trying to enable the Tracking option to create a moving map for staff and I can't seem to get it working ...
2
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1answer
166 views

How to create a custom input text in a CartoDB

What is the best way to modify the searbox listener searchbox in the CartoDB map? I would like to disable the default event listener for the CartoDB searchbox and first to execute my own listener and ...