Questions tagged [geolocation]

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

62 questions with no upvoted or accepted answers
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9
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1answer
6k views

Downloadable, Open Source, IP GeoLocation database

I have an open source project I need a similarly open source IP GeoLocation database for. i.e. IP address to country (and ideally city). Ideally with a license that allows redistribution. This is a ...
6
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0answers
731 views

Translate Orientation from Sensor data to Geo location

I am tracking a device that might loose GPS signal then and there. And when the GPS signal is too low, I should use the accelerometer and Gyroscope sensors data to guess which way they should have ...
3
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0answers
859 views

Warping Image having Lat Lon Geolocation array

I'm trying to implement a script to project an image having the two matrices of Lat and Lon points. I've followed the steps proposed in: Unable to warp HDF5 files and everything is fine. I create the ...
3
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0answers
659 views

Get all locations of Panoramio photos in a given extent

To create a visual quality heat map I'm trying to get a list of all Panoramio photos in an about 2000 Km2 wide study area. My idea is to perform a density analysis in GIS on a point shapefile ...
3
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1answer
2k views

Getting random coordinates based on country

Are there any webserveices/APIs that can take a country name and return a random coordinates (not including the sea/ocean sections) inside that country?
3
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0answers
59 views

Algorithm for estimating position of many objects and differentiating those?

Let's assume a crowd-sourced tree location use case where a research team asks hikers to GPS the location of a specific tree type in case they encounter it. This will lead to a large number of ...
2
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1answer
15 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 ...
2
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0answers
83 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 ...
2
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0answers
226 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 ...
2
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0answers
95 views

Can someone point me what's the type of encoding used in

I am trying to understand the type of encoding used to represent a poly line on earth from here.com Platform Data Extension service requesting ROAD_GEOM_FC layer. "LAT":"5013674,12,12,16","LON":"...
2
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0answers
469 views

Using Python-Flask-MongoDB with Geolocation field running on App Engine?

I'm trying to write an app which would act as a address caching API, so basically it needs to store addresses (geolocations) and later on I could query on a random address and radius and get all the ...
2
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0answers
742 views

how to transfer GPS device coordinates into mobile android app?

i'm trying to make an android app that collects data field in high accuracy, since the phone native GNSS doesn't provide highly accurate coordinates, i want to use Coordinates provided by a real GNSS ...
2
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0answers
145 views

project hdf file with geospatial_lat and lon in batch process

Is there any way that I can do a batch process in projecting hdf files wherein I could get and include only the geospatial_lat and lon in the batch script since every hdf file have different ...
2
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0answers
2k views

Geofencing: Query if a POINT is within a POLYGON

I am trying to use the following query to search if a point is within a defined POLYGON (aka a geofence I want to define): https://spatial.virtualearth.net/REST/v1/data/[DataSourceID]/[...
2
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0answers
238 views

Location API works, but neither Google Maps, not Here maps can not find location

I used Holux M-241 as GPS receiver. On Windows 8.1 I installed GPSDirect drivers, and now can see my location on PC. I tested that Location API can access to gps data (I used this Mozilla Developer ...
2
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0answers
237 views

Geolocate stores inside a mall?

OpenStreetMap lists the malls in Albuquerque, but not the stores inside these malls. Using the in-mall map/directory, wouldn't it be easy to add stores inside the mall? Is anyone doing this? ...
1
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0answers
36 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 ...
1
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0answers
83 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. ...
1
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0answers
16 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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0answers
151 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 ...
1
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0answers
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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0answers
38 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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0answers
114 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
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0answers
196 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
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0answers
29 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 ...
1
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0answers
35 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 (...
1
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0answers
253 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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0answers
548 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 ...
1
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1answer
63 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 ...
1
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0answers
1k 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 ...
1
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0answers
180 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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0answers
64 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(...
1
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0answers
44 views

Interpret terrain type from height data and/or geolocation

I have downloaded a large subset of the STRMGL1 Dataset, and have further split each entry down into 5km by 5km tiles. I now need to start classifying each tile by terrain types. Are there any ...
1
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0answers
638 views

Retrieve geolocation and image url from Blob in MySQL

I have a web form that collects three items: name, notes, and a geotagged img and stores it in mysql. The image is stored as a blob. I would like to scrape/access the blob's geo-location properties ...
1
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0answers
418 views

GIS data visualization

I have a huge data set with geolocation information. I am trying to visualize the data but the tools cannot handle such a big graph. Size of the file is about 5GB and has more than 3 million rows. ...
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0answers
1k views

Achieving more accurate geolocation

Currently, I am using Google Maps API with HTML5 geolocation to create a POC about asset tracking via a web service. The user opens the web browser and we track it from there and display it on an ...
1
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0answers
275 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 ...
1
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0answers
32 views

Adding Composite Geocoding Database

I'm following an MIT tutorial I found here: https://libraries.mit.edu/files/gis/geocoding.pdf, to try to add a locator to ArcMap. However, as I am not an MIT student, I cannot get to the step where I ...
1
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0answers
110 views

photo2shape QGIS 2.1x

I'm stuck on a problem with photo2shape in QGIS 2.1x (I already tried several versions). I installed Exif Reader and photo2shape worked fine for me. Since last week QGIS crashes as soon I start ...
1
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0answers
480 views

How to directly get a Google API map based on a cell tower object

How do I pass a cell tower object to the Google Maps JavaScript API or Embed API to get a map for wherever the tower happens to be? I realize that I can accomplish the task in two steps by first ...
1
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0answers
101 views

Free Tide prediction service - World (a freeware program would work as an alternative)

Is there a free service where I could input a GPS location and it would return me the current tide situation at the position? As an alternative - some library / program that does the exact thing one ...
1
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0answers
336 views

Geolocation Ptojection Transform is not working for custom coordinate system

I am using Openlayers API and I have a custom projection and I defined it to my geoserver named "EPSG:51100". I have a custom tile map. var tms2013 = new OpenLayers.Layer.TMS("2013", "http://...
1
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1answer
792 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 ...
0
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0answers
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 ...
0
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0answers
12 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?
0
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0answers
13 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 ...
0
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0answers
29 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, ...
0
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0answers
19 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 ...
0
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0answers
92 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
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0answers
100 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 ...