Questions tagged [geospatial]
Geospatial pertains to the geographic location and characteristics of natural or constructed features and boundaries on, above, or below the earth's surface; esp. referring to data that is geographic and spatial in nature.
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questions
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code plots - spatial data
I am an absolute newcomer in R. For my bachelor thesis I worked with spatial data. I did many plots with the normal "points"-function. I already have my results, but would like to improve my code.
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3
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0answers
34 views
Accurate && precise location data within a timeframe (session)?
Scenario
A session would start & end within a time frame. Within this time frame, the device would be moving within a constraint environment. The movement would be extremely slow (slow-walking ...
2
votes
1answer
33 views
Reload polyline midpoints into parallel tables
I have an Oracle GIS database that has spatial tables. The records in the spatial tables have a geometry column that contains polylines.
I've written a Python 2.7.16 script that calculates the ...
6
votes
2answers
322 views
Angular control for inputting latitude and longitude with validation
I've built a custom control to handle user input in a human-readable format, but save in a machine-format.
It needs to have input validation, and to convert UI-input to a base format.
I'm interested ...
1
vote
1answer
56 views
Work order spatial query (Part 2)
Part 2: Error Handling (and anything else that can be improved)
(Part 1 focused on general cleanup.)
I received this comment in an unrelated post (thanks @Milton):
...Since it is obvious you are ...
6
votes
1answer
93 views
Graphing refugee movements using plotly in Python
I've created a simple data visualization in python that shows the movement of refugees around the world. The code works but I feel it is a bit slow. it takes about 10 s (on my hardware at least) to ...
6
votes
1answer
118 views
Work order spatial query (Part 1)
Part 1: General Cleanup
(Edit: Part 2 is here.)
I have a script in a Work Order Management System (Maximo) that performs a spatial query.
Details:
Takes the X&Y coordinates of a work order in ...
4
votes
0answers
70 views
Python program for address normalization and geocoding
This is a school project I have been working on. I have created a program utilizing Tkinter, and I was hoping to get some feedback on the way I have gone about things. I feel like it is pretty messy ...
13
votes
5answers
804 views
Converting Geographic Coordinates into Lambert2008 coordinates
This is part of a game made in Unity3D.
I wrote this class to convert geographic coordinates into lambert 2008 coordinates based on this reference document:
http://www.ngi.be/Common/Lambert2008/...
6
votes
1answer
77 views
Get nearest major city of an image (using EXIF GPS data)
I am writing a program that will take images in a folder, get the GPS Coordinates (from the EXIF data), then return the closest "major city".
(I define a major city as one with an airport, so ...
6
votes
3answers
319 views
3
votes
1answer
297 views
Aggregate Pandas Columns on Geospacial Distance
I have a dataframe that has 3 columns, Latitude, Longitude and Median_Income. I need to get the average median income for all points within x km of the original point into a 4th column. I need to do ...
10
votes
1answer
119 views
Convert British and Irish National Grid references to or from WGS84 geodetic coordinates
I've been using this wgs84togrid program for a few years. It converts in both directions between National Grid coordinates for GB or Ireland (beginning with a ...
0
votes
1answer
42 views
Analyzing distances between clusters of orders [closed]
I wrote the Python class below, which does what I want it to do, but the data structure is a mess. Was wondering if there was a better structure I could use to get the same results but with better ...
5
votes
1answer
124 views
Python toolbox for OpenStreetMap data
Background
My project is a Python toolbox. This is my first bigger coding project and it took me quite some time to code this toolbox. I learned a lot from the start point to this day. I changed this ...
1
vote
0answers
442 views
Wrap location API in coroutines
In my app I need to query location and scan wifi periodically. To conserve power I need to change the rate dynamically, depending on the distance to the target. Also I want to wait for both ...
5
votes
1answer
78 views
Rate-limited geographic data lookup
I'm looking for a code review of this python I wrote - this code reads the zipcode column value from a CSV file and calls an API to retrieve lat, long, state and city info.
It works fine and gives me ...
10
votes
2answers
164 views
Where is the most desolate place in Colorado?
The Story
While flying a plane over the forests of Wisconsin a couple years ago, I thought to myself "If I lost an engine, I would be awfully long way from an emergency landing airport. I wonder ...
2
votes
1answer
49 views
ProcessPoolExecutor KMZ file search
I've written a script to look for coordinates in KMZ files. I've tried to speed execution up using the ProcessPoolExecutor. I'm quite new to Python, so any recommendations are more than welcome.
<...
2
votes
1answer
51 views
Javascript class to geocode Dutch addresses
I am relatively new to javascript ES6, the code I've written is working fine. However I am curious if this would be the best approach. I am trying to write a reusable module that I can use in multiple ...
3
votes
0answers
1k views
Function to calculate distances and nearest points between 2 GeoPandas dataframes
I have 2 geoPandas frames and want to calculate the distance and the nearest point (see functions below) from the geoSeries geometry from dataframe 1 (containing ...
4
votes
2answers
125 views
Find SuburbName from latlong or location
I have create one class and interface for finding SuburbName based on Location or LatLong coordinates.
My interface
...
2
votes
1answer
71 views
Finding the nearest defibrillator exercise from CodingGames
For my first attempt at Scala I decided to solve a simple exercise on codingame.com.
Based on a string input containing the user location, the defibrillators count and a list of defibrillators ...
4
votes
2answers
3k views
Convert geodetic coordinates to geocentric (cartesian)
I'd like to retain as much float precision as possible without having to resort to specialized libraries so I need this code to work with only standard modules.
I'm doing this in QGIS where ...
7
votes
2answers
256 views
Function to find user's region based on GPS coordinates
I've made an algorithm/ function to get a user's region based on their GPS coordinates. It primarily looks for big cites and counties for the region and the state for the outer region eg. orange ...
2
votes
0answers
114 views
Determine the country by an IP
EDIT: I have updated the code, if you have comments about the previous version of the code, please do post them anyway.
The task is to determine the country by an IP.
Provided programme queries two ...
1
vote
0answers
82 views
KNN search by distinct category in postgis/postgres
I have a postgres table, etablissements with millions of rows, and a geom (st_point) column , spatially indexed (using gist). I'...
1
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0answers
73 views
Writing a table of national park data
I'm working to produce a Lookup table using the Arcpy module that contains descriptive statistics for US National Parks.
The original data, found in tbl, has 12 ...
1
vote
1answer
62 views
vectorize 2D gradient with spatially varying bins
The following code takes in some values ssh and solves the equations for the geostrophic motion (slide 8 here).
The main part of the code is the computation of the ...
4
votes
0answers
290 views
Generate NDVI Rasters from USGS EarthExplorer Landsat 8
I've written the following using Python Dictionaries and Pathlib Module. I'd like to improve the first function: list_landsat_bands.
I've created a list of file patterns to match, which I then use ...
1
vote
0answers
366 views
Log visitor info like latitude, longitude to a database
I am collecting each visitor information like ip, lat, longitude, referrer and language and save it into db, then in db I have column in table with counter that increment if user revisits the web site ...
4
votes
1answer
331 views
DBSCAN “region query” too slow; implement a tree?
My current DBSCAN in Python works...but its indexing is far too slow; its a linear scan:
...
7
votes
1answer
803 views
PANDAS nearest site algorithm
I have got CSVs full of property transactions in the UK from 1995 to 2017, separated by year such as "RS2015.csv". I have a 2nd CSV with a list of wind turbines in the UK. Both have coordinates in WGS ...
1
vote
0answers
32 views
Efficient backend for finding nearby properties
I am thinking of building an app based on location for finding nearby properties around 15 km from the location of the user. I am a beginner in Django and for such use case I could code the following ...
8
votes
3answers
1k views
Mask latitude text field
I have an input element on one of the pages. This input is supposed to take a string of digits from a user. In order to enhance UX I'd like to mask input's value at any given time. Like so:
What came ...
4
votes
3answers
352 views
Methods for calculating the distance between Polish postal codes
Let's consider we are a company who sells our products for other companies. In the programme the actors are an Agency (agencies of our company, we have a few in the ...
3
votes
1answer
183 views
Set time zone from cookie
Is the set_cookie variable the correct way to signal that the cookie should be set? It does not seems pythonic to me:
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-1
votes
1answer
36 views
Count buffered streets that intersect buffered points using PostGIS
PostgreSQL 9.5.1 with PostGIS 2.0 extension
This first section creates an intersection (clip) of the streets from another polygon (MTC15), then it buffers the intersection:
...
-1
votes
1answer
37 views
3
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0answers
125 views
Get nearest driver from 2.5 millions of data using mongodb
I have created 2.5 millions drivers dummy data, in this case lets say the drivers are moving around in the city. The driver's document look like this :
...
5
votes
1answer
713 views
Laravel Pagination with haversine formula in it
I'm using the haversine formula to count distance from selected post-code to desired destination.
I have the following scope in ...
5
votes
3answers
177 views
Haversine Formula in Clojure
I implemented the Haversine formula to calculate the distance between two (latitude, longitude) coordinates.
I was wondering if it looks natural to Clojure programmers. What could be improved?
<...
1
vote
2answers
169 views
Generate new latitude and longitude in decimal
I have created simple algorithm to generate the new Location from given latitude and longitude.
...
7
votes
1answer
227 views
Raster processing for climate change model
I am working on a project on how climate change may affect the development of spruce budworm larvae throughout each year (historical and projected) using different climate change models and emission ...
4
votes
1answer
3k views
PANDAS code for calculating distance between waypoints
I've written some python code designed to take a csv of waypoints for a series of trips, and calculate the distance of each trip by the sum of the distance between the waypoints.
An example csv might ...
6
votes
1answer
151 views
Calculating areas of map features
I am developing a plugin for QGIS (a Geographic Information Systems) software which uses Python. I have calculated four areas of interest, it does this by identifying each feature on the map (called <...
2
votes
0answers
135 views
Reduce sample rate of GPS data based on distance between points
The algorithm needs to reduce an RDD[GPSRecord] based on the distance between several points, e.g. "give me only GPS records when the distance between them exceeds ...
2
votes
1answer
184 views
Arcpy script to check for TIFF files and add them to different lists
My script goes through sub folders in my main directory and based on a wildcard checks if a tiff file exists or not, if it exists then the file path is appended to the corresponding list. For example, ...
1
vote
0answers
73 views
Extract climate variables on species range from worldclim and save into CSV
My code is currently taking too long to extract climate variables from the worldclim dataset. I would like to download the climate data from the link and find the maximum temperature over my species ...
3
votes
1answer
130 views
ArcPy script to analyze land use in counties
We have written a Python script using arcpy modules. It is was written by Python beginners and many parts of the code are written in 'unpythonic way'. The goal is ...
