Questions tagged [spatio-temporal-data]

Data with a spatial component (points, lines, polygons, raster data, etc.) as well as a time component (a particular date, time, date *and* time, span of time, etc.)

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29 views

Semantic for encoding geometry-event relation in a spatio-temporal dataset

I'm assembling a database of spatio-temporal events; think deforestation for instance. I have different types of geometries that link to the events in different ways. I would like to encode that meta-...
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21 views

Filtering duplicate records using space and time overlap

I have a dataset consisting of about 23,000 fire incidents obtained from years of fire brigade reports. The incidents have a lat, lon, and timestamp. The problem is that in the case when two (or more) ...
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Spatio Temporal Interpolation with gstat in R-Studio

I am very new to spatial evaluation and come from psychology. I am using the software R and the packages "gstat" and "spacetime". I would like to do a spatio temporal interpolation....
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37 views

Dissolve spatio temporal data with GeoPandas without missing the temporal part

I am wondering if there's a clever way to use the dissolve() method of GeoPandas with a spatio temporal geodataframe without losing the temporal part. I have a dataset where for different days of the ...
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31 views

How to use create Space-Time Cube tool for street network?

I have a dataset that contains a street network (line geometry) and the number of related crashes incident (point geometry). To generate a Spatio-temporal dataset to detect space-time patterns, each ...
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112 views

Spatio-Temporal Plot on a Basemap

I have trajectory data in LineStringM format and visualize relevant results via Leaflet on street map tiles. I was wondering whether it is possible to visualize spatiotemporal plots on OSM tiles. I ...
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1answer
95 views

Temporal nearest neighbour analysis in QGIS

How do I conduct a temporal nearest neighbour analysis in QGIS? Not sure if that's the right terminology, but basically, I have a dataset with ~100,000 house price transactions over a 5 year period. ...
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1answer
80 views

How does one make and use temporal joins of CSV files in QGIS?

I have two CSV files, one with spatial information, and one with temporal information, to be joined on id It looks like there are several methods, Layer/Add Layer/Add Vector Layer of both CSVs (or ....
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268 views

QGIS Temporal Controller with raster data

Starting from QGIS 3.14 TimeManager is dead, long live the Temporal Controller! There are a lot of tutorials out there how "Temporal Controller" deals with vector layers, which looks nice. ...
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80 views

QGIS Temporal Controller - last/most recent object within a temporal frame

i am working with temporal controller for just a cluple of days - before i've been using time manager. right now i am searching for a way to display the last/latest/most recent feature within a time ...
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1answer
148 views

Temporal controller - time-dependent symbology based on @map_start_time

I was just recently whatching Nyall Dawson's video "QGIS 3.14 time handling and map animation demo". at min 47 (nyall dawson / youtube video min 47 ) things are getting interesting from my ...
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65 views

temporal rolling mean in stars

I need to find temporal rolling means (or other stats - max, min, etc) in stars spatial obects. For stars raster cubes, this would be directly analogous to the calc(rasterBrick, function(x) movingFun(...
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33 views

Map variables do not appear in field editor or in project settings

I am attempting to utilize a few of the map variables (particularly the new @map_start_time variable associated with the added temporal features in 3.14). I am on version 3.14.1. I do not see any of ...
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122 views

Alternatives for the Emerging Hot Spot Analysis/Mann-Kendall statistic (less than 10 time steps)

I came across ESRI's Emerging Hot Spot Analysis (Space Time Pattern Mining toolbox) and really like what it does. Unfortunately for me, it relies on the Mann-Kendall statistic which apparently needs a ...
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17 views

Existing standard country codes explicit in time and space

There are several comprehensive systems for coding countries such as ISO, TLD, M49. I am looking for a system that is explicit about the time period that the code refers to. My application is a ...
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43 views

Spatio-temporal clustering Algorithm

I'm working with a dataset with latitude, longitude and date-time. I have millions of points per day and I want to group them using a clustering algorithm. I read this question Clustering geographic ...
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37 views

Spatio-temporal kriging

I have a geospatial dataset of air quality and I want to interpolate the air quality value across time and space for unmeasured location and time instace. I found gstat package in R could do the ...
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980 views

Indexing coordinates in order to get a value by coordinates from xarray

Firstly, I am a super rookie and just recently started working with GIS. Therefore I am not sure how to ask/word the question, or even if it makes sense. So bear with me. I have some NetCDF files, ...
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219 views

GeoJSON and/or Shapefile: Temporal data w/ multiple dates per feature

I have a large dataset that's frequently being updated, and it consists of tens of thousands of geospatial polygons, each of which has one or more (potentially over 100) timestamped average ...
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1answer
249 views

Joining points and polygons by date in Google Earth Engine

I am using an aerosol index, which I reduced to a daily mean for 2019: var airq_19 = ee.ImageCollection('COPERNICUS/S5P/NRTI/L3_AER_AI') .select('absorbing_aerosol_index') .filterDate('2019-01-01'...
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1answer
45 views

Measuring/4D relation querying within linestring using PostGIS

let's assume a Linestring(Z)M holding a timestamp as measure variable with each point. Is there a way to easily query "on the relation of those timestamps between the points". For example to find ...
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2answers
1k views

Python function/library for spatio-temporal clustering?

I want to cluster based on time lat and long. Is there a way I can do this? The context is I am trying to detect connected sites in same electric ring. The data I have is the location of the site(lat/...
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2answers
304 views

NetCDF time aggregation using R stars package

I have a monthly temperature netCDF dataset with aprox 20 years and I'd like to calculate a monthly climatology (average of all Jan, Feb, Mar...). I know I can do this with stackapply from package ...
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1answer
114 views

Georeferencing a numpy tensor (spatio-temporal data)

I have a CSV file in which each row represents a record of an event with the following columns: latitude, longitude, time I want to build a numpy tensor with n x m x 8760 (hours in a year) ...
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174 views

Can ArcGIS Operations Dashboard manage routine data collection at same geographic points?

I have started working an organisation that uses ArcGIS to manage its GIS data generally. They use a wide range of other software and methods to also manage collection of routine data, such as: ...
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123 views

Proper identification of duplicates using spatial and temporal criteria in PostGIS

I have a table with metadata about sampling locations in the ocean. It includes geographic coordinates, date-time in which sampling was done the number of vertical measurements in each location (...
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86 views

Using a MODIS code for DAYMET and I don't get any output

I am using the code below that was originally provided by @Kuik, and I have since converted the bands to DAYMET 'tmax' and 'tmin' bands. Problem is that when I run the code, I receive no output. ...
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218 views

spatio temporal anisotropy in R: stAni argument in vgmST and krigeST

I have some problems in understanding the usage of argument 'stAni' of vgmST and krigeST functions, for the setting of spatio temporal anisotropy. How have I to interpret this argument, that is the ...
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153 views

Space-Time Principal Component Analysis with Missing Lat/Long Data [closed]

I am looking to run a space-time Principal Component Analysis on Shotspotter data from Brockton, MA: http://justicetechlab.org/data/. Shotspotter sensors record the timing, location, and number of ...
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1k views

Google Earth Engine: How to calculate regular day interval means in image collections, maintaining “system:time.start” field?

I've merged three Landsat collections in Google Earth Engine, now I need to calculate median values at regular time intervals, let's say 32 days, because I will create a collection to join with MODIS. ...
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81 views

Showing change of lot division/ownership over time?

I am new to GIS programs and using ArcGIS Pro. I am mapping a neighborhood and looking at creating a detailed database of the ownership history. Currently I have the lots configured to have an ...
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1answer
328 views

How do you export a temporal KML from QGIS?

If I have data with a timestamp attribute, how do I export that from QGIS into a time-aware KML that invokes the GoogleEarth time slider? I do not see any sort of options in the Save vector layer as ...
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1answer
1k views

Calculate if day/night time for point dataset [closed]

I have a point dataset (crime data for Stockholm) with timestamps and I want to calculate for each point if the certain crime happened during day or night time. So connecting the timestamp to sunrise ...
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946 views

Emerging hotspot analysis (space-time patterns) in QGIS

I worked with crime data a while ago and was really impressed by the possibility in ArcGIS to detect significant hotspots and their development over time (Emerging hotspot analysis). Does anybody ...
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1answer
72 views

How to analyze temporal change in wind?

I have daily data for several years (GRIB but also available as netCDF), I would like to investigate how the wind speed and direction has changed along the migratory route of a bird (in spring) and ...
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1answer
352 views

Aggregating point data regarding lat/lon and year

I have two datasets: The first one contains georeferenced point data. The structure looks like that: The second one contains georeferenced point data + radius. The structure looks like that: My ...
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Generating missing yearly data, based on a more detailed temporal data set

I have several very large raster data sets of land use classifications (ie. forest, wetland, argicultural, etc). The most comprehensive data spans 2009-2015. I have reclassified this data to match ...
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1answer
253 views

Using the ArcGIS Time Slider on non-temporal data?

We're looking at re-purposing ArcGIS temporal tools, chiefly the Time Slider, to model potential flood hazards. Our input data are a series of polygons showing varying water depth. Elevation (depth) ...
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2answers
917 views

QGIS merge multiple layers and keep highest valued polygon / grid cell

I'm still at a beginner level at QGIS. I'm aware of MMQGIS toolbox but I still can't figure out how to solve this problem.: I got multiple layers indicating the number of events in a grid cells within ...
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362 views

Specify temporal domain subset in WCS/WPS

I am setting up the WPS module for GeoServer, which has worked well so far, except that all of our raster layers contain a temporal component to them, so I need to be able to specify the applicable ...
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0answers
158 views

What are GIS methods for temporal analysis for poor data? [closed]

I'm interested to know what GIS methods or techniques there are for operationalising time-series data for spatial/temporal regression analysis where data have temporal data gaps. For instance, if I ...
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2answers
634 views

Add time dimension to vector layer in geoserver REST

I'm trying to create a layer from a PostGIS table with REST api, I can create the layer but couldn't add the time dimension. I can configure the dimension in the interface and I did try to get the ...
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1answer
153 views

Removing dynamic time text for time enabled map in ArcGIS

I recently created a map with time enabled and would like to format the displayed date time in order to show only the date portion of the text. Currently I'm using the default formatting shown below ...
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1answer
1k views

Time Manager in QGIS to perform spatio temporal analysis

I am working on identification and monitoring of pipeline oil spill using remote sensing and QGIS. (I am a new user.) I wish to know how to use the time manager in QGIS to monitor the incident events. ...
2
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1answer
304 views

Dealing with spatio-temporal data: sp::over function in R

I have a dataset called carcass, which contains occurrences of livestock carcasses in Norway in the last 5 years (each raw corresponds to a single carcass, which has an ID number, along with longitude,...
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1answer
706 views

dynamic visualization of spatiotemporal data on a grid

I am handling spatiotemporal data and it is a quite new area for me. Basically I have data related to the position of cars at a given time in Montreal. I would like to dynamically visualize the ...
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3answers
377 views

Obtaining older Google earth raster image for indicating urban sprawl

I am planning to show Urban Sprawl over a time period of 10 years. I am need of older Google earth image for the area. Also, let me know about the useful ArcGIS temporal tools for such analysis.
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948 views

Spatio-temporal kriging - useful if not interpolating to new time points?

I have data measuring a variable Z say at several locations on a fixed network (each location at a fixed longitude and latitude). values of Z are measured daily at the same time. At the moment I am ...
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1answer
108 views

GRASS GIS temporal raster individual layer statistical summary

I have created a temporal raster in GRASS GIS which has 90 layers. I would like to extract the mean of each raster layer and export it as text file. Right now I have to export the rasters as GeoTiffs ...
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1answer
217 views

Tile server for temporal data

Is there any tile server that is able to render tiles for temporal data? I need to serve tiles for rain radar data and serve them in tilserverurl/{x}/{y}/{z}/{time} or similar way I've done a ...