Questions tagged [geolocation]

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

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18 views

Download location data of electric car charging stations [closed]

Can anyone tell me where I can get either shapefile or downloadable coordinates for electric car charging stations (I am interested in Denmark but anywhere is Europe is cool too).
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20 views

Random coordinates need to move little right

I have amcharts map which shows circle on it. I have few records(nearly 200) which do not have locations. These records(circle) I am showing in the map in Sea so that those records clearly will be ...
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1answer
44 views

Leaflet geolocation alternative for if access is denied [closed]

I have the following that prompts the user to give location access. On granting permission the user's location is shown and the map loads. I'm trying to find a solution for if the user accidentally ...
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27 views

Determine the heading or azimuth angle of satellite Meteor M2

I am working on a project Meteor decoder, where I need to calculate the pixel geolocations of the satellite image to draw map overlays. I have all the angles except the azimuth angle. I tried to ...
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74 views

Is there any limitations on using OpenStreetMap with Leaflet or OpenLayers in request count? [closed]

I have a project that needs an online map to determine customer current location and store location, so calculate the distance between them and the price of shipping. If this app can be able to ...
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1answer
50 views

Qfield layers are not where they should be. CRS problem?

I have created a basic QGIS project with a basemap and a point layer saved with CRS OSGB 1936/British national grid. When uploaded to Qfield, my actual location and the layers I have uploaded don't ...
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1answer
178 views

Re-locating points randomly at certain distance in QGIS

I have GPS coordinates which identify aid projects in Africa. Now, I want to re-locate these projects, such that each project is re-located by 100 km in a random direction from its original location. (...
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3answers
60 views

Figure out location of city direction sign in image - friday fun project

So I came across this image and wondered where it could be located given the directions and distances. But I started to realise that the sign is all wrong. I'm guessing the Greek alphabet one is ...
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567 views

Gettting all countries information in world using Google API

The Scenario: My customer wants to let the users insert their location either by choosing the country, city, region, state, etc.. from dropdowns OR the user can choose the location using google API ...
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1answer
30 views

How to get Netherlands neighborhood names based on Addresses?

CBS provides key figures on the neighborhood level for the whole country(NL). I want to incorporate this data for analysis but my datapoints include addresses and postcodes and latitudes&...
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55 views

Determine if a great circle is on the left or right from a point defined by latitude, longitude and bearing

Given A point coordinate on the map specified by latitude and longitude. Shown as "C" on pictures below. Direction where this point is moving, specified by bearing in degrees (0-359), where ...
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1answer
21 views

Determining if particular point is near country or state boundary

I'm developing an accessibility Add-On for flight simulators that allows a blind person to fly. The App is coded in c#. I can easily get the GPS location of the user's Aircraft. What I want to be able ...
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32 views

How to enable positioning in underground Metro/Subway stations for smartphones? [closed]

Summary: my smartphone can't do public transport journey planning in underground metro and subway stations because it doesn't know where it is. Is there a description for cities and public transport ...
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10 views

Can you export location details from an image submitted in forms and directly import this information into the forms produced CSV?

I am hoping to produce a form that can create lines of data including geospatial data in order to plot this information on a map. My form requests an image followed by questions to supply data with ...
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14 views

How calculate distance of two points (between my location and previously my location) in JavaScript?

I am using JavaScript and geolocalisation but I want to calculate the distance between my previous location and new location. How can I do this?
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15 views

Checking location in which polygon

I have KML file for country polygon. I can read the KML file in PHP and see all boundaries. What I want now is when I put a marker on point showing me the title of the polygon. Does anyone have any ...
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33 views

Imported DXF has no position attribute using QGIS

I am using QGIS 3.10.8 and still getting my head around QGIS. I'm trying to import some route data from dxf into my QGIS project. when I import and set the CRS correctly it is in the correct place, ...
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84 views

Standard(s) to store and share geolocation and 3D orientation data for an object, e.g. a raster

As an example, GeoTIFF is a great standard to embed geolocation data into a raster file for cartographic purposes. But in that case, raster files are usually supposed to be on the projection plane. ...
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1answer
33 views

Define point locations in relation to slope [closed]

I have a dataset of settlements that I would like to put in relation with slope and aspect layers that I have made to see if there is a preferred altitude or direction (facing north or south, etc.) ...
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1answer
39 views

Get the begin and end coordinates of city municipality

I am not sure if this is the right place to ask this question. I would like to have an idea of precise coverage (extend) for the latitude/longitude of the city of Porto, Portugal. This is in ...
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20 views

Set Browser location dynamically to random location

I am working on a program that is supposed to run on a mobile client and track the location. However, as I am implementing on a non-mobile desktop client, I would like to have something like a chrome ...
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18 views

Searching geodetic databases for historical landmarks in Canada by Station names (or numbers)

I am interested in historical landmarks within Canada. I have a Station name ... Station 08U1209. I would like to read what information is available about it from our Canadian Geodatic database, but ...
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1answer
326 views

Python function to get the co-ordinate pair of a point

I am trying to geocode a point shape. But first I want to determine the coordinate pair of the point shapefile before geocoding. The error I get is: **ERROR** :ValueError: Must be a coordinate pair ...
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1answer
90 views

Sorting by distance in MySQL

I found a sample of code SELECT * FROM locator WHERE SQRT(POW(X(center) - 49.843317 , 2) + POW(Y(center) - 24.026642, 2)) * 100 < radius in this question Find points within a distance using MySQL....
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1answer
383 views

Export user location in Leaflet

I want to use the following Leaflet function: # Generated using folium <!DOCTYPE html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> <...
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1answer
213 views

Determining XY location [closed]

I am new to a system and the information it gives me for job sites is XY(238391648,71539666):294616358697. I have been trying to use convertors to change this to a longitude and latitude definition ...
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79 views

Optimizing/reducing geolocation data for speeding up visualization [closed]

I have an application that receives geolocation data from clients (cars) every minute and shows this on a web page (like owntracks). The data is stored simply in an SQL database - 1 point is 1 row, ...
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40 views

How to prepare oneself to show a polyline based on latitude and longitude information in a csv/json file with heatmap information too? [duplicate]

I am quite new to working with JavaScript as well as geo location systems. I am looking for an open source JavaScript library to show - on the web - something very like the running trackers show you -...
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2answers
306 views

Determining if two locations are duplicate

I'm working on an app that will display drugstores in a map. I have a table that has all drugstores, each with its Lat/Lon. We used several different sources to add the data to the table: the ...
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77 views

How to find the coordinates (longitude, latitude) of a point in an aerial image? [closed]

I will be receiving drone images from an associate. It'll have longitudes/latitudes values from the corners of the image. I don't have access to his image processing S/W. It'll be in a relatively ...
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210 views

OpenLayers GeoLocation.getPosition() is inconsistent

In my mobile application I am using OpenLayers and trying to capture current position of the user by using GeoLocation.getPosition() method. The method sometimes returns position and sometimes return ...
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149 views

Comparing 2 GPS location data files to find if any location from one file is within a specified elliptical region of a location from another

I have 2 CSV files with GPS coordinates. I want to check if there are any locations in the first file which are inside a specified elliptical region surrounded by each location in the 2nd file. The ...
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34 views

Identifing specific plants out indexmaps (pixelgroups) and convert to .shp

I am working on a project where I have to identify a specific plant (it is toxic) in fields. I made a high resolution Orthomosaic (1,4cm7/px) and created a vegetation index where the plant I am ...
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1answer
62 views

Checking Position History with WiFi?

I've just read this article about geolocation history and wifi https://www.pcworld.com/article/3315197/free-wi-fi-hotspots-can-track-your-location-even-when-you-arent-connected.html If I clearly ...
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39 views

Converting latitude/longitude into a slab number (or item number) and vice versa?

Purpose: To compress the data transmission for the longitude and the latitude. Initially these datas are in the form DD.MM.mmmm: degrees, minutes, ten thousandths of a minute. Latitude stands under 28 ...
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162 views

Leaflet catch window position

This is what I want to do: When loading the map, it will first grab the window coordinates of the current screen, and then load the data points of the current screen. The next screen is as ...
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216 views

Move polygon to new location (find new lat-lng coordinates)

I need to move my polygon (region of geographical area) with 4 different (O1, O2, O3 and O4) lat-lng coordinates (as shown in the figure) to another place, so that I get new values of all 4 lat-lng ...
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1answer
2k views

Opening and Using .tif and .twf files in QGIS

I have in the same folder .tif and .twf files with the same names. How should I open them in QGIS correctly? If I select add raster layer and add the .tif file, would that be enough? Would QGIS also ...
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1answer
64 views

API that can give the latitude and longitude ranges from the address

Is there any API available that can get the latitude and longitude boundaries from the address. For example if we provide: 12380 Sunnyvale avenue, CA, 90005 Can we get the latitude minimum and ...
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30 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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1answer
568 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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13 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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2answers
3k 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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1answer
803 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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273 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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1answer
113 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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836 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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1answer
42 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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52 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
2k views

Collecting 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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