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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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55 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 ...
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35 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 ...
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47 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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23 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
69 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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14 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 ...
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0answers
31 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 ...
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1answer
48 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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0answers
73 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 ...
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1answer
28 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
35 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 ...
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1answer
226 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 ...
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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)....
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1answer
188 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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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 (...
2
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1answer
136 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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107 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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1answer
418 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 ...
2
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0answers
115 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 ...
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1answer
400 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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1answer
310 views

Openlayers 4 Geolocation is not working

geolocation: function () { var self = this; self.geo = new ol.Geolocation({ trackingOptions: { enableHighAccuracy: true }, projection: self.Map.olMap....
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1answer
121 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
157 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 ...
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1answer
57 views

Firefox zooms to user's location even if locator button isn't clicked when useTracking is true

When I am in Firefox and go to Esri's example at LocatorWidget and add useTracking: true to the geoLocate definition e.g. geoLocate = new LocateButton({ map: map, useTracking: true }, "...
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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
2k views

Calculating distance from geolocation in Java

I'm trying to measure distance from one geolocation to another in Java. On stackoverflow I came across the following post and google developer page, giving me the following formula. 6371* acos( cos( ...
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1answer
298 views

Set Metadata domain with GDAL (python bindings)

I'm trying to set geolocation metadata in a gdal vrt with python bindings. ds = gdal.Open('foo') ds.SetMetadata ({'X_BAND' : '1'}) gdal.BuildVRT('bar', ds) Results in a vrt with the following ...
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0answers
159 views

How to attach POIs in wikitude with google map places [closed]

I want to create android application which uses AR and using camera it found the different stores around it and highlight it as display in this image. I am using wikitude sdk(javascript API) and ...
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1answer
42 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 ...
2
votes
1answer
862 views

Fire click event on Leaflet layer using latlng pair

I have a button on a leaflet map that when clicked zooms the map to the users current location. This function is working properly. <button type="button" id="locator" class="btn btn-primary btn-lg"&...
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1answer
83 views

Mobile “GIS”/geolocalization application for popularisation of science? [closed]

I am looking for an mobile multi-platform (or at least Android) application which will allow me to share my spatial data. On day to day bases I am working with QGIS in archaeology and with Losuc GIS ...
4
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1answer
342 views

Converting Australian coordinates (EPSG:3112) for mapping in R

I'm trying to map road accidents in Australia, which comes with x and y coordinates (e.g., x = 1328459.1 and y = 1670878 for Adelaide) as well as the following information: PROJECTION LAMBERT UNITS ...
19
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1answer
628 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 ...
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1answer
567 views

Python - How to Get lat lon information from .asc file

I have a .asc climate data file at hand and want to explore it to extract some information. Based on searching, some general read methods have been tried as, import it as python pandas or numpy ...
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1answer
441 views

Grabbing Twitter locations with Python: Receiving ReadTimeOutError

I am running the following code with Python to grab Twitter locations for a specific bounding box: import json from tweepy import Stream from tweepy import OAuthHandler from tweepy.streaming import ...
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1answer
63 views

TurfJS Intersect not functioning with real coordinates the way it does with regular numbers

I have function that takes a users coordinates and tests it against a polygon. When I create the fence with whole numbers such as [3,2], [3,4],[5,6],[3,2]. My function returns correctly. I tried ...
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1answer
69 views

How to calculate Lat,Long,Alt of a pixel in an Image where lat/long/alt corresponding to one of the pixels in the same image is known? [closed]

I have an image taken using a mobile phone like the one attached below. Let's say that I know the location(lat/long/alt) from where this image was taken, which is probably the center of the red circle ...
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0answers
871 views

Want to access android location services in a leaflet.js project running in a webview

I am running leaflet.js project on my android app using a webview. Everything is great but for current user location leaflet uses GPS because it runs in a webview and as we know webview is extention ...
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0answers
44 views

Getting error while assigning Geolocation to raster

I am using VIIRS imagery EDR dataset and trying to give Geolocation to Brightness Temperature layer by creating VRT files of Longitude, Latitude and Brightness Temperature layers given in HDF5 dataset....
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0answers
62 views

Urban positional accuracy of Google Streetview [closed]

How does Google Streetview have accurate locations in urban environments, such as in tunnels, below buildings and next to buildings?
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1answer
30 views

Summing attribute values from many points geocoded on same location using ArcGIS Desktop?

I have geocoded a batch of addresses and many of these are geocoded on the same location. Now I want to keep just one point on each location but sum the field values of all points from the same ...
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0answers
151 views

Not able to figure out what is wrong with geolocation or projection in upoaded raster

I am working on VIIRS SDR dataset. I had different layer of Brightness temperature, latitude and longitude in given .HDF5 dataset. Using reference from http://geoinformaticstutorial.blogspot.in/2014/...
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1answer
33 views

GIS different coords

Could you, please, explain me the difference between two types of coordinates: [-11539.488377739675,6710096.017961704] and 51.4977973,-0.2691569 These coordinates represent London location, but ...
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vote
1answer
7k 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

How to map fence post holes to reality?

I'm looking for a good technique to take points, which mark the locations of fence post holes, from a Google map layer to then precisely mark with paint where to drill the holes. I noticed that my ...
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0answers
49 views

How to include long.vrt and lat.vrt into bt.vrt as x-dataset and y-dataset respectively, Using python?

I am using following code to create bt2.vrt file using python. import numpy as np import gdal from gdalconst import * import osr # Function to read the original file's projection: def GetGeoInfo(...
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0answers
71 views

Finding River Lots in Alberta, Saskatchewan and Manitoba using QGIS?

I have to border farmlands in Canada (Alberta, Saskatchewan and Manitoba). Usually they give input in the form of DLS like SE-9-56-22-W4.So I use https://locator.scadalink.com/dls2latlng.html to find ...
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1answer
279 views

Showing user's location on Carto map?

I have a series of tram stops on a Carto map and would like to indicate the user's location. Is this doable in Carto? https://jamieparker.carto.com/builder/161cab96-859b-433d-8a72-5ae5653b1b8e/...
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1answer
132 views

Can I use avaraging to pinpoint the exact location of a stationary GPS device?

I have a simple Android app that keeps track of users' location, using the following setting of the LocationManager to avoid constant updates and thus battery drain minTime = 60sec (minimum time ...