Questions tagged [gis]

Geographic information systems (GIS) provide facilities for storing, managing and analyzing geographic data which can be used for statistical purposes.

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51 views

How to handle multiple points at the same location in spatial interpolation?

I am new to the topic of spatial interpolation and would appreciate your opinion on a general question which has arisen. Suppose I have a data set containing rental rates for different apartments in ...
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1answer
27 views

How to get the density estimate for the whole region based on data from several locations?

I am collecting air pollutant data for every area in a region. The available data I can find only has the data from stations in a few areas. Is it possible to estimate the air pollutant density for ...
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0answers
19 views

Confidence interval of the weighted mean

In a sampling survey, I get $N$ cases about whether to support a policy and get $x_i(i=1,2,..,N)$, $x_i$ is binary, support $x_i=1$, and $x_i=0$ otherwise, give a weight $w_i(i=1,2,..,N)$to every case,...
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0answers
49 views

Analysing Google Maps Timeline data (KML/JSON) for driving patterns? [closed]

I'm looking at buying a plug-in hybrid car, and trying to get some idea of driving patterns since that will hugely influence its real world fuel consumption. Since Google is a creepy stalker that ...
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0answers
22 views

Find the nearest point of interest by latitude and longitude

I have lat/long value of 180k points of interests. Now I have lat/long value of about 800k locations, what is the most efficient way to find the nearest points of interests for each of these 800k ...
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1answer
132 views

Clustering spatial data based on location and values

I'm looking for a way, preferably in R, to create a cluster of point data (specifically, the centroids of UK postcodes), where each cluster comes as close as possible to containing a certain number of ...
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0answers
70 views

Rate Smoothing in Spatial Data -

I asked this question on Reddit a few days ago but didn't get any responses. Working on some spatial epidemiology research a while back, that has resurfaced, I was told that I should smooth the ...
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1answer
119 views

Satellite data pre-processing for Keras CNNs [closed]

I’m looking at satellite data and want to do object detection using CNNs in Keras. I’m currently pre-processing the data (turning them into tensors) that I’ve obtained which include the original ...
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0answers
70 views

Basics of Akaike's Information Criterion in GIS/Hydrology

I have been asked to use the AIC to assess the relative fitness of various terrain wetness index (TWI) methods for predicting soil moisture in a specific study site. The TWI is calculated from a ...
4
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3answers
159 views

How do I calculate the proportion of smaller squares covered by a larger circle?

I would like to determine the proportion covered by the circle (say r = 2800m) of each cell (say 1000 x 1000 m). The circle is centered around the center of the focal cell of a rectangular ...
2
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1answer
46 views

Given a set of addresses, pick a geographically even subset for sampling

There are a certain number of houses spread randomly across a city. We have addresses and GPS coordinates for each house. How can we select a geographically representative, fixed-size sample out of ...
23
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2answers
845 views

What statistical model or algorithm could be used to solve the John Snow Cholera problem?

I'm interested in learning how to develop a geographic approximation of some kind of epicenter based on the data from the John Snow Cholera outbreak. What statistical modeling could be used to solve ...
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1answer
121 views

Metric for spatial auto cross correlation?

I am trying to find anomalies in time series data with geolocations. For different time intervals, e.g. for some week or for some day or for 6 consecutive months, I want to learn whether there is ...
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1answer
37 views

Population Modeling Statistics on a Map

I've got a question regarding the modeling of populations. So I am programming a population map that is geometrically amendable. For this, one can define an area and define the number of people ...
2
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0answers
34 views

Sample class ratio vs. real world class ratio

I am using RandomForest to generate a model to detect burned forest areas based on the reflectance values of satellite imagery. The burned area accounts, on average, for 10% of the pixels in my images,...
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0answers
122 views

Input geolocation Data in Neural Network

I am working on a Neural Network that should predict certain transport-tariffs based on start and end region of the transport. The region can take different forms, from a whole country to a range of ...
3
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0answers
854 views

Performing spatial logistic regression in R

I am trying to perform a logistic regression with the following code Y ~ x1+x2+x3,data=data, family=binomial(link="logit"). However on inspection of both the ...
2
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1answer
5k views

Applying DBSCAN to a huge GIS dataset with a Haversine distance metric.

I have a training set (2GB) that contains GIS trajectory data for multiple taxi rides. I want to cluster the final destinations based on their spatial density and have therefore been trying to use the ...
4
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2answers
3k views

The right way to use Machine Learning to predict latitude and longitude

There are some simple ML techniques that can be used to easily predict latitude/longitude co-ordinates, such as predicting the latitude and longitude separately using two different models. However, I ...
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0answers
20 views

What is the best method to statistically test two areas?

I am investigating the difference in childhood obesity rates between Dudley and Brighton & Hove. These areas have similar deprivation rates but very different childhood obesity rates. I am looking ...
2
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1answer
1k views

Predicting Co-Ordinate Data

This is on a prediction model we were trying out among a bunch of us trying out ML for the first time. Basically I have a training data set of network user ID's with their location (latitude and ...
2
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0answers
67 views

Help required in controlling for socioeconomic factors when mapping travel behavior

Background I have cleaned disaggregate travel data down to a household level (of about 75% of households) and socio economic data aggregated into 100-200 household blocks. What I'm wanting to do is ...
2
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2answers
627 views

How to create a GIS basemap in R? [closed]

I am an expert GIS user moving towards R more and more. I have been using R for some basic regressions and such, but I would like to begin to use and manipulate GIS data in R. How can I create a ...
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0answers
56 views

Correcting for Bias due to Larger Populations

I'm mining social networks point data to use with GIS (Geographic information system). Obviously there are going to be more posts in areas with higher population which, if uncorrected, would end up ...
2
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2answers
572 views

How to predict demand from historical “continuous” event data (date, lat, lon)?

I am attempting to predict demand for our service, both quantity but maybe more important, location (hotspots). I am by no means an experienced statistician, so I need some help :) I have all the ...
5
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1answer
270 views

Testing for non-random overlap of polygons

I have two polygon shapefiles and I want to see to what extent the observed amount of overlap is due to chance. I'm thinking of some kind of permutation test, but not sure of the best way to proceed....
2
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1answer
526 views

Clustering spatio-temporal data?

I have data in the form of timestamp,lat,long which is gps data for users. I'm new to data mining and want to understand how can I start clustering these data to understand more about it. Should I ...
5
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0answers
120 views

Help with designing the analysis of a radio telemetry study

I was wondering if there are any spatial ecologists out there who can provide some insight on the trouble I'm having with my Masters research. I am looking at the association a bat species to high ...
3
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3answers
2k views

95% confidence ellipse of Lenth's maximum likelihood estimation

I'm attempting to write a simple mobile app to help colleagues triangulate the signal of transmitter-fitted animals in the field. I've been using Russell Lenth's 1981 method of Maximum Likelihood ...
7
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2answers
254 views

How to capture competitive spatial interactions between multiple stores and customers

I am estimating sales with data on customer and store locations and attributes using a Huff-style model, where sales decay with drive time and increase with attractiveness of the store. One ...
2
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1answer
187 views

Identifying culs-de-sac (circular housing arrangements) with GIS data

I'm thinking about a new project, so I don't have data yet, but I plan on collecting GIS information for houses within a state. Usually in the U.S., these dead-end streets will have a large circle ...