Questions tagged [geolocation]

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

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Read and head data from Geofabrik OSM

I am trying to read and head all the data from geofabrik specific country using this code: from pyrosm import OSM, get_data df = get_data("country_name") df.head() But I am getting this ...
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Creating buffer spaces in meters around LineString line in KML using Python

Any suggestions to create buffer spaces on KML LineString using Python? I tried with few libraries.. geojson shapely kml2geojson Here, converted KML to GeoJSON and added buffer space on the ...
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Is a GIS database necessary? Most efficient way? [closed]

I have been tasked with finding an efficient way to store data of thousands of addresses to compare to a broader set of addresses of all retail stores in America. Ideally, I would like the database to ...
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4 votes
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109 views

Combining location from Nominatim with Overpass API query using Python

I try to get the geocodes coordinates from the location(nominatim) into the Overpass query. Is there an easy way to do this? import json import requests from geopy.geocoders import Nominatim ...
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Seeking geocoding API specifically for India

I tried Nominatim with GeoPy but it is missing out >80% of locations which are all in India. I saw some APIs for specific countries such as (1) https://geocoding.geo.census.gov/ and (2) https://...
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Converting from eastings and northings to LatLong on layers in QGIS

I have been prototyping a simple navigation app using QGIS. If I generate tiles from OpenStreetMap using Generate XYZ Tiles, I create a basic app using Leaflet JS. I can then use the Geolocation API ...
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73 views

Getting current user location automatically every "x" seconds and calculating the difference in km

I'm trying to get the users' location every "x" seconds then calculating the difference in kilometers. Here is the code that didn't work: <html> <head> <meta ...
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1 answer
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MapToScreen / ScreenToMap functionality (or similar)

I need to display latitude/longitude coordinates of the mouse pointer on the map, as the user moves the mouse. I searched the examples and found this API [Map.ScreenToMap] in an older version of the ....
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5 votes
2 answers
140 views

Moving two layers with different geometry at once with snapped vertices in QGIS

I would like to be able to move two layers that look like you see below: Basically, when I move the polygon object, to which the lines are snapped as a separate layer I want them to be intact at the ...
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Geofences in Leaflet with live Location

I'm a newbie in terms of programming. I'm building a Web App with Angular and Leaflet, which has to locate the users position and notify him in case he is close to specific buildings. There are ...
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Will two GNSS modules displace by the same amount?

I am using two gps modules with blunos (bluetooth arduinos) too get the distance between them and display it on a phone. This has worked great and on avg Im getting the expected 5m inaccuracy. However ...
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Looking for QGIS equivalent of ArcGIS "Create Locator" tool

I would like to create my own locator in QGIS based on our address points and streets segments datasets instead of using web services like OSM, Google or Nominatim. Is there a tool available for that ...
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Rounding latitude longitude locations up/down to approximately 0-1 kilometer to mutual GPS coordinations dot/point

This is a very simple problem I have to solve simple (in JavaScript, but it doesn't matter for that topic). OK its possible so solve that the hard way, but I just want to solve that as easy as ...
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OpenWeatherMap instead of delivering the name of the city, is delivering the name of the neighborhood/sector that is within the city

API doc: https://openweathermap.org/current Example: Latitude: -23.600113020956506 Longitude: -46.720092594623566 Call to API: https://api.openweathermap.org/data/2.5/weather?lat=-23.600113020956506&...
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Identifying if a user is in building or shopping mall using GPS or WiFi data

I am trying to understand if there is a logic to see if a user is in a shopping mall or a building or outside using GPS or WiFi data captured from a mobile phone. Is there a logic to check?
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Edge artifacts with GDAL Warp & geolocation arrays

I am using GDAL warp utility to georeference sensor data where each pixel has an associated geolocation. I routinely observe strange artifacts at the image edges: For context, this image shows ...
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Custom Geolocator

I have got about 300k address points and I created a custom Address Locator in ArcGIS Pro from the points but when I use the Locator to geocode address tables the result is always not satisfactory. ...
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Geolocate Organizations: Measure Precision, Restrict to Country

I am trying to geolocate a list of >1,000 of Indian institutions / NGOs / Universities etc. However, I only have the names and states of these. What I am looking for is an output that gives me (1) ...
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Geolocating and writing many TIFFs at same time using R

I have found a way to give a PNG the CRS and location of a geolocated TIFF, and to convert the PNG to TIFF. Now I have to apply it to different PNGs in the same folder (all named Pt6_frame1, ...
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1 answer
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Geolocating images with info of another image

I am trying to use the geolocation information of a tiff image to geolocate another. Both images are frames from the same drone footage, with the drone still over the same position. The one geolocated ...
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Embedding interactive Google Maps into a Google Form

I have a Google form with some questions. People can answer the questions about (future) trees they want to have in their neighbourhood. But there also must be the possibility that people mark the ...
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Google Reverse Geocoding API doesn't work on mobile internet

I was able to get Google Geolocations and Geocoder API to work via desktop and on my phone when its connected to wifi, but when I disconnect from the wifi, geocoder doesn't display the results. just ...
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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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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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2 votes
0 answers
265 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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1 answer
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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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9 votes
1 answer
394 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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3 answers
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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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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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1 answer
56 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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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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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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1 vote
0 answers
61 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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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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1 vote
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89 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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1 answer
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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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1 answer
105 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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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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2 votes
1 answer
750 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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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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695 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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-1 votes
1 answer
379 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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2 votes
0 answers
102 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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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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2 answers
826 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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1 vote
0 answers
177 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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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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230 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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1 vote
0 answers
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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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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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