Questions tagged [geolocation]
Geolocation is a means to discovering the physical location (in real-world geographic terms) of an object.
226
questions
0
votes
0answers
36 views
How to download point locations as GeoJSON using Leaflet JavaScript in Django
I want to download point locations from Leaflet js map with Django backend as data collection. When I click on the map it makes a marker and redirects to page http://127.0.0.1:8000/static/data/...
0
votes
2answers
41 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 ...
1
vote
0answers
33 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 ...
1
vote
0answers
45 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 ...
0
votes
0answers
44 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 ...
0
votes
0answers
28 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 ...
0
votes
1answer
37 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 ...
1
vote
0answers
34 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 ...
1
vote
0answers
46 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 ...
1
vote
0answers
98 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 ...
1
vote
1answer
129 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 ...
1
vote
1answer
54 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 ...
1
vote
0answers
39 views
Calculating Points of Inaccessibility
With limited skills in this area, I'm looking for someone who might be able to help me calculate the Points of Inaccessibility for various regions such as a country like Germany, a state like Florida ...
1
vote
0answers
28 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 ...
3
votes
1answer
97 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 ...
0
votes
0answers
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 ...
1
vote
1answer
1k 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 ...
0
votes
1answer
291 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 ...
0
votes
0answers
155 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. ...
1
vote
0answers
59 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 ...
0
votes
1answer
419 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
...
0
votes
0answers
20 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>...
1
vote
1answer
33 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 ...
0
votes
0answers
42 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 ...
0
votes
1answer
561 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 ...
5
votes
0answers
86 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 ...
0
votes
1answer
98 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 ...
0
votes
1answer
47 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 ...
3
votes
1answer
384 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 ...
1
vote
1answer
78 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)....
0
votes
1answer
339 views
External GPS feed for HTML5 geolocation API in 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 ...
1
vote
0answers
33 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
votes
1answer
222 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?
0
votes
0answers
161 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 ...
1
vote
1answer
584 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
votes
0answers
157 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
votes
1answer
586 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 :
...
1
vote
1answer
570 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
votes
1answer
183 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 ...
1
vote
0answers
332 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 ...
0
votes
1answer
58 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
}, "...
1
vote
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 ...
1
vote
1answer
3k 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( ...
0
votes
1answer
600 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 ...
1
vote
0answers
214 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 ...
1
vote
1answer
54 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 (greater than 100 meters), we need to identify in ...
2
votes
1answer
1k 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"&...
0
votes
1answer
98 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
votes
1answer
565 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
votes
1answer
659 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 ...
