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Questions tagged [geolocation]

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

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1answer
73 views

Is there a way to Collect Lat-Long in a Google Docs Form by adding script?

So I need am trying to figure out a way to collect Lat long data and have it saved automatically when I fill a Google form on my phone. Is it possible as retracing address to plot is not possible for ...
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1answer
50 views

ISO 3166-1 alpha-2 Country and region location in coordinates

I am doing some mapping that requires country and region average coordinates. I've found this very useful table with the coordinates of countries, their ISO 3166-1 alpha-2 code and the average ...
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1answer
33 views

Avoid overwriting the style of a marked cell in Leaflet & Javascript

I have a system where I mark cells with different colours if a geoposition has been obtained within a cell. My issue is that due to the continuous update of geopositions, cells that were marked with ...
3
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1answer
46 views

Combining GPS and WiFi geolocation

I see that Google combines GPS with WiFi geolocation results to increase location accuracy. Does anyone know how it's done? How is WiFi information useful when it can have 10m+ accuracy? Is it only ...
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2answers
3k views

Checking if a geocoordinate point is land or ocean?

I got the corner geo coordinates from a xml product file of a Sentinel-1 GRD SAR image. When looping through the pixels of the image I wish to check whether it represents land or sea. I figured I ...
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0answers
27 views

Construction Lines offset when added to fabric

We use geo-positioned CAD data then copy paste survey accurate data into our Parcel Fabric. When we convert them to new parcels, the points move off the correct location by two to 5 feet. What ...
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0answers
10 views

Well Locations in NAD27 do not overlay well locations on aerial or satellite images, i.e. Google Earth

Well Locations in NAD27 do not overlay well locations on aerial or satellite images, i.e. Google Earth. Computations are based on accurate locations and would like to know if it is better to place ...
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1answer
44 views

User tracking on a defined route

I am having a vehicle route with a set of latitude and longitude values. User need travel on the specified route, If user deviates from the route (Grater than 100 meters), we need to identify in which ...
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2answers
92 views

Seeking data of worldwide shore lines and bathymetry?

Is there a free database with all geolocations for shorelines? Is there a free database for near-shore bathymetry data?
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1answer
47 views

How to determine which point lies in which polygon from a list of multiple polygons

I am new to python and currently working with Json file and I need to determine the location of each tweet and represent the grid in which they are present with the count of tweets in each grid cell.I ...
2
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1answer
159 views

How to move geolocation in OpenLayers 5 programatically

My geolocation in OpenLayers is incorrect by more than 5000 meters. I want to correct this issue, how can I programatically move my geolocation to the most accurate location? Or is it even possible?
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1answer
215 views

How external GPS can feed HTML5 geolocation API for django-leaflet

My goal is the following: I'm developing a Django project. The goal is to locate places with a form. I'm using a CreateView generic view (maybe I should create it manually for more customization. 3 ...
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1answer
1k 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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1answer
192 views

Latitude and longitude values in Google Takeout location history data sometimes out of range

I've exported my geolocation history data as a JSON from Google Takeout and the latitude/longitude values are out of normal range sometimes. It seems to happen for some locations only, while others ...
3
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1answer
2k 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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1answer
276 views

Creating custom input text in CartoDB?

What is the best way to modify the searchbox 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 ...
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0answers
62 views

How to create a map-based survey with drag-drop capability?

I am an urban planning master student. I need to create a map-based survey for my research. The survey should allow users to drag some different points from the toolbar to the map showing next to it. ...
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0answers
28 views

How can I access the user's location in my Google Earth Engine script?

I'm working in Google Earth Engine and I want to access the user's location to then be able to use the position when visualizing data layers. When running the code below, GEE doesn't seem to be able ...
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1answer
151 views

How to get GPS location in OSMDroid without Internet connection?

I made a little app in Android using OSMDroid library, my map is loading from assets. Now I want to put my GPS location on that map, but without using Internet connection. I found these ...
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0answers
15 views

Get exact address of mobile device using geocoder

I have been trying to get exact address of mobile device using geocode. Here is my code function showPosition(position) { debugger; console.log("Latitude: " + position.coords.latitude + "<br>...
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1answer
26 views

Accurately tracking location in outback? [closed]

I am looking for a way to efficiently track my whereabouts/tracks whilst traveling through the Australian bushland. In the past, I've just recorded my longitudes and latitudes from a basic GPS onto a ...
1
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0answers
203 views

Parse GPS track data into 10 sec intervals

I have a GPX track containing latitude, longitude and elevation data. The recordings are done by a Garmin device and have been recorded in varying intervals (between 1 and 44 seconds). I would like to ...
7
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2answers
1k views

Open source location allocation modelling

I'm looking for open source tools for location allocation modelling (eg planning public health facilities). Preferably in a GIS environment. I know GRASS somewhat, but v.net.alloc doesn't seem to ...
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0answers
33 views

Is the accuracy or PDOP included in smartphone or GPS camera?

I would like to properly geolocate picture Exifs on a smartphone or GPS camera and would like to record the accuracy of the GPS position as well. I have downloaded a few photos from camera review ...
3
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2answers
5k views

Socket Server to receive GPS location data

I am working on a web application which receives data sent from trackers via TCP Packets containing location information. Up until this point we have been working with dummy data within the mysql ...
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0answers
78 views

Calculating centre of city? [closed]

A lot of career websites allow you to select jobs from within a radius of your chosen location. Since cities and towns can be considered irregular in shape, sprawling in the definition (do you ...
3
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1answer
254 views

Leaflet.locate: permission error on different browsers

I inserted a simple button for geolocation into a Leaflet-generated map by adding L.control.locate().addTo(map); into my HTML file. In Chrome and Firefox it works great, Safari and Internet ...
3
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1answer
9k views

How to convert distance into latitude + longitude [duplicate]

I have start point (latitude) I know direction, lets say strictly north, and I want to calculate latitude which is 100 meters above the start point. The same for longitude. I believe there should be ...
2
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0answers
30k views

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

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 ...
1
vote
1answer
518 views

Using CartoDB to detect user location and put dot on map? [closed]

I have a CartoDB question. 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 some pretty bad road ...
19
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1answer
629 views

Why are geolocations on Twitter “rounded”?

I'm plotting some geolocations (lon, lat) of tweets collected using the Stream API with a 7mi. radius. The picture below shows two maps of the same data, but using different alpha/transparency for ...
21
votes
8answers
48k views

Seeking Country/State/City Database?

I am creating a directory which uses locations to categorize all listings. Instead of relying on user input, I'd like to provide a list of locations which the user can select. I have already tried ...
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1answer
38 views

Geolocation using global map in ArcGIS Desktop? [closed]

I want to show my study sites (15 from different countries) using a global map in ArcGIS Desktop. I'd like to show latitudes and longitudes (perhaps with a map grid). Is there a way to drop pins ...
2
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5answers
481 views

Some companies receiving GPS data from vehicles when GPS cannot 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
439 views

Displaying markers within viewport for different country in google map?

I have multiple location. One is from Netherlands and one from India. How to display both country marker in google map view port? Currently only Netherlands markers are displayed. So I have to drag ...
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1answer
8k views

Leaflet How To Update User Position Marker Real Time

I am trying to update user position in leaflet. Like when the user walks with their phone their location marker will move too based on location data just like Google Maps. Right now I'm just putting ...
2
votes
1answer
1k views

Masking land with matplotlib basemap in Python?

I've been trying to mask land with .is_land from mpl_toolkits.basemap. When running following code: map = Basemap(llcrnrlon = 7.298914095230308, llcrnrlat = 58.98235690451632, urcrnrlon =...
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1answer
57 views

Placing Excel Data in ArcMap/ArcScene similar to Image Georeferencing

I have XYZ-dataset of Temperature Data in Excel, with no (Lat, Lon) added. Every time when I try to display the Data in ArcScene the Programm tells me, that a Spacial Reference is missing (of course)....
3
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2answers
1k views

Reading MODIS L1B into ENVI

I am working with MODIS Terra (and simultaneous ASTER) Level 1B swath data using ENVI and am having one of these "this should be easy" questions about the most direct way to get to geo-referenced ...
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0answers
118 views

Display and manage (CRUD) point cloud in (Geo)Django 2

I would like to use GeoDjango to Geolocate the place I will scan. Would start to 3D scans with a DIY lidar based on Arduino/Rpi. So far no worries. Then, The Goal is to save x,y,z as input in ...
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0answers
30 views

Determine geograpic coordinates from one fixed location as accurately as possible without expensive hardware

I build a GPS disciplined oscillator and I need to set antenna coordinates in order to be able to operate it as accurately as possible. What I need is a way to determine the geographic coordinates (...
28
votes
8answers
61k views

Generating random locations nearby?

I am trying to create random locations nearby my location. What i want is to create random latitude/longitude pairs inside a 200 meters circle surrounding my location. This is the formula i came up ...
3
votes
4answers
7k views

Difference between Positioning and Localization

I would like to know what are the differences between Positioning and Localization. In most papers they are used interchangeably. Are they the same? Does one come after another? I always thought ...
2
votes
1answer
297 views

Where can I find tower information

I want to find geolocation with GSM Cell information. I need tower information to find locations and calculate triangulation. I tried OpenCellID service but I think it's not up to date. I can't find ...
2
votes
0answers
126 views

GDAL, Geolocation Arrays, and Overflow Error?

I'm trying to use GDAL to create raster images from NOAA GSIP L2 data products. By looking at the provided NetCDF files from NOAA, it appears that geolocation arrays are provided. I tried following ...
0
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1answer
457 views

openlayers 3 and geolocation without HTTPS

I am creating an application where user can locate himself on map. the code is working fine in local development environment, but when i deploy it over server(IIS) the code won't work. here is code : ...
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2answers
1k views

Python- use geocode function on table of addresses & copy lat/long to appropriate row

I have a table of addresses, and I need my Python script to use my Google API geolocate function to return lat/long coordinates for each and add to a new field in the same row for each address. The ...
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1answer
373 views

Openlayers 4 Geolocation is not working

geolocation: function () { var self = this; self.geo = new ol.Geolocation({ trackingOptions: { enableHighAccuracy: true }, projection: self.Map.olMap....
6
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1answer
135 views

Figuring out the most probable country out of a string?

I got a problem with a twitter analysis i am doing. What i want to do: Based on the country i want to make a nice graphic about how many tweets were posted per country. Using python and tweepy i ...
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0answers
181 views

standard for generating a geolocation error ellipse from lines of position/bearing

Given SEVERAL points, where each point is a line of bearing (LOB)/line of position, and thus each point consists of a (1) latitude & (2) longitude position on the Earth's globe that this LOB is ...