Questions tagged [geospatial]

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designing an order management and dispatch management system for couriers

I'm studying to develop an order management system and order dispatch for the couriers, this is a personal project, for study purposes. Some important points about the deliverymen, they are bikers and ...
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1 vote
1 answer
42 views

Strategy for dealing with geolocation and geocoding inaccuracies

For a mobile app, we are using the Google APIs for geolocation and geocoding. The basic use case is to find entities within a certain radius (in the range of a couple of kilometers) of each other. ...
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1 answer
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How to represent Spacial Time Series data in json clearly?

Currently, I have an application generating time series spacial data. The data is weather data with coordinates and a time of reading. I would like to receive chunks of the data in a time series way ...
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1 vote
2 answers
629 views

Patterns for keeping two states in sync?

A problem been thinking on... I'm on an application that involves two web maps, both showing the same data but in slightly different situations basically (say a different basemap or projection, etc)......
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1 vote
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Collection and delivery algorithm

I need some help finding references to solutions to this problem. This is the basis of a real-world application I'm working on, rather than an academic problem. There are 4 main objects: Water (...
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-1 votes
1 answer
88 views

How can I efficiently find out if X is in any of N ranges of L-R numbers?

This is part of a bigger problem, which is to find out if point XYZ exists in any of n (XYZ -> XYZ) "boxes". I'm currently splitting up the problem into a smaller one, by focusing on one dimension ...
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-3 votes
2 answers
157 views

Options for managing a multi-purpose web service?

I have a web service that serves two purposes. On a weekly basis, it syncs records from the GIS DB to a workorder management system's database. On a continual basis, it serves up the records to a ...
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2 votes
1 answer
71 views

Storing and filtering spatial data within RAM

I'm trying to figure out what's the proper way of storing and filtering spatial data inside a running program. I have a 2D map of theoretically infinite size. Users generate objects which are placed ...
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2 answers
75 views

What are formats to store geographic maps for a robot to travel point A to point B

Very beginner. Need to compute route from A to B for a robot. i would like to know how to store area map and compute the route. I can compute shortest path etc using algorithms e.g. dijkstra. What ...
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  • 47
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1 answer
54 views

Evaluate http reqres vs websockets for geolocation based broadcasts

My use case is that I have a real-time broadcast app where users get feed items based on a geolocation, i.e. a user will receive posts that were broadcasted from within a user-defined radius where (s)...
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  • 175
3 votes
0 answers
414 views

Self hosting map vector tiles for web application

I'm building a web application, which involves (currently) a REST backend and a frontend SPA. The backend is hosting massive geo-enabled data, and the frontend is displaying it on a mapbox map. I'm ...
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1 vote
2 answers
436 views

Handle country specific properties such as price and currency

I have an architecture front-end / back-end, specifically an Android app and a backend. I want that the app user can see different prices and currencies depending on their geo-localization. So my ...
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4 votes
0 answers
100 views

How to store data at various point in time? [closed]

What are the techniques and technologies that people use to store spatial data over time that performs fast when querying? For example, you have a map where people add data at certain locations over ...
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  • 49
1 vote
0 answers
743 views

Android intent: Using ?q= in a geo: URI [closed]

I noticed that the Airbnb Android app sends such an intent to open a map app at a particular latitude/longitude: geo:0:0?q=77.77%2C88.88 From my simplistic point of view, they should use the ...
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1 vote
0 answers
45 views

Check if a point is deviating from a path made by a set of line segments

I'd like to know or have other ideas --other than my solution-- about how to check if a car on a given position (lat, lng) is getting away (let's say a distance D away) from the path where the car ...
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1 vote
1 answer
176 views

How do travel search engines combine flights

I'm curious about how the flight/train search engines combine the results from multiple sources. For example, let's say I'm asking to go from London to Paris, and let's assume there are no direct ...
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0 votes
1 answer
35 views

Find whether or not current location is near other locations with given radii

tl;dr: "Am I, with any given location, inside of any number of circles with varying radii" Assume you have a database full of locations (coordinates) with arbitrary radii. Now the user enters and ...
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1 vote
0 answers
56 views

How do I minimize the number of database queries in a GeoJson API (of countries, and smaller areas) with custom data?

The general version of the question is above - a a little more detail, I am using Django Rest Framework, but am happy for answers to be dealing with the problem in abstract. So, I have data with ~200 ...
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  • 111
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1 answer
223 views

Compute geographic areas Laravel

I am developing a backend for a taxi app in Laravel 5. Up to now, served areas are defined by the admins but I would like to change the way it works. I would like each taxi driver to define their ...
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  • 103
1 vote
1 answer
129 views

Search by Location and Keywords [closed]

I have data set with ~5M entries/rows (~2GB). Every entry contains a location field (lat/lon coordinate-pair) and n keyword fields (keyword-1, keyword-2, ... keyword-n). The keyword-fields can all ...
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  • 81
2 votes
3 answers
123 views

Find all circles that cover one point

I'm not sure if I've been searching using the wrong keywords, but I've tried so many different ways of wording this and I can't find a relevant answer. Basically, given a set of circles defined by ...
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  • 123
1 vote
4 answers
539 views

Is it necessary to collect zip codes if I'm already collecting address, city, and state?

I'm currently building a B2B web application. As a part of the signup process, I require users to enter their office's street address, state, and city, which I then geocode into latitude and longitude ...
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  • 111
1 vote
2 answers
234 views

How should one implement the dependency-injection for a geocoding client that aggregates different coordinate provider implementations?

I am new to DI and I would like to know how DI might be used to help resolve this problem. If I have an ILatLongLocation which implements a Latitude and Longitude, then given two of these I can ...
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2 votes
1 answer
165 views

How to canonise a road network

I am working on geographical data which represents the road network of some city and I need to automatically fix inaccuracies in the data. Data was manually produced by “drawing” the road network ...
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  • 2,810
2 votes
1 answer
3k views

What is a good way to store geographical data for distance calculations

What would be the best way to store data in a database for geographical calculations? Say I have an ItemsForSale table paired to a Users table which holds their geo location. I know I can use latitude ...
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  • 175
2 votes
1 answer
218 views

Programming conundrum - most efficient path

I have a non-language-specific problem which I'm having trouble finding a workable answer for. I have a 10x10 grid containing integer values from 1-10. Each value represents the cost of travelling ...
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5 votes
1 answer
72 views

How to model and query spatial responsibilites of company local branches

what are best practices, to model and query spatial responsibilities of company local branches? My company has many local branches which are all in general responsible for 1 city. This is the easiest ...
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  • 153
0 votes
2 answers
451 views

What are the benefits of using geospatial datatypes?

We currently store points as three floats (lat,lon,alt) and support only one type of query (points within a given radius) but look forward to support more queries. We are using PHP and MySQL. What ...
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10 votes
4 answers
3k views

finding houses within a radius

During an interview I was asked given the following: A real estate application that lists all houses that are currently on the market (i.e., for sale) within a given distance (say for example the user ...
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1 vote
1 answer
260 views

Zoom to Fit Points on Surface

I'm attempting to develop a piece of functionality using a 3rd party map control in an application that automatically pans/zooms the map surface to the best possible view given points on map. The map ...
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  • 111
9 votes
8 answers
5k views

Scanning a billion rows in an ultra-fast database

Background A local database contains nearly 1.3 billion unique rows. Each row is indirectly associated with a specific latitude and longitude (location). Each row has a date stamp. Use Case The ...
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