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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61
votes
12answers
7k views

Visualizing speed of movement on static (= printable) map?

Imagine you're tracking, for example, vehicle or animal movement and receive regular GPS position updates. How would you visualize speed of movement on a static (= printable) map? I've been coloring ...
57
votes
3answers
24k views

Openlayers Animation Examples and Algorithms

i wonder for a long time if people in this community uses openlayers for animation needs. we have know this that animating on browser is a little bit exhausting for it but when a map meets with ...
33
votes
9answers
8k views

Visualisation of spatio-temporal data set?

I'm investigating visualisation of a spatio-temporal data-set. What examples are available, online or offline, of high-quality spatio-temporal data visualisation?
16
votes
4answers
837 views

How to handle TIME in GIS?

Is there any way or any idea on how to handle Time attribute in GIS? For example, which are the ways to specify that an object is at a place at a given time interval and them it is in another place ...
11
votes
2answers
2k views

Designing Spatial Database for temporal Data? [closed]

I am working on a Weather based GIS App. I have the data from several weather stations, and this data will updated daily (by a web service). The obstacles I am facing are: There are currently 40 ...
11
votes
2answers
661 views

Which weather on my road? Looking for a spatial weather forecast web service

My friend Bob goes from A to B leaving tomorrow morning at 6:00. There are many direction services that indicates him short, fast and/or cheap routes. Bob does not like to drive under the rain and ...
10
votes
1answer
568 views

(How) do the modifiable areal unit problem and modifiable temporal unit problem interact?

I am reconstructing historical time series of land use and other related data from a variety of sources with different spatial and temporal resolutions and would be interested in what possible (hidden)...
9
votes
1answer
486 views

online map of 242,888 locations: which service to use? (what if temporal heat map?)

I have a 161.8 MB large CSV file with geocoded locations (with latitude and longitude) for 242,888 lines. I want to have an embeddable online map of all this. I wonder which service could deal with ...
8
votes
2answers
3k views

How to animate raster time series using open-source GIS?

I have a bunch of rasters taken about 10 minutes apart, and I have a nice QGIS project that produces pretty enough maps of them. I'm wondering if there's a way to animate this raster series, with a ...
8
votes
3answers
2k views

Temporal Analysis Tool: Seeking

I am looking for an alternative tool (proprietary or FOSS) that matches the functionality of Temporal Analyst for ArcGIS by DHI Software. The best I could get was the QGIS plugin Time Manager ...
6
votes
2answers
10k views

How to create an animated map?

I am seeking to create an animated map illustrating the simultaneous movement of different objects across a large area over time. The display should be capable of playing automatically, or by ...
6
votes
1answer
292 views

Spatial+Temporal database request for 4D intersection

Here is the function I need to implement. My application deals with mobile objects with variable position and range (think of radar range). As I can't test each minute if n mobiles detect each other (...
6
votes
1answer
260 views

Predict user's future location - location awareness mobile computing

This question is a part of an online course (Mobility Data Management) that I am currently auditing. A part of the project is to implement a system that can predict user's future location. This kind ...
5
votes
1answer
795 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 ...
4
votes
1answer
2k views

How to filter date values using OGR 1.11.0?

With OGR 1.10.1 this works: ogrinfo test2.shp -sql 'SELECT COUNT(*) FROM test2 WHERE DATE < "1970-01-01"' Note that DATE is a column of type date (not string). (Here's test data if you want to ...
4
votes
2answers
1k views

Creating network simulation / temporal models for videos? [closed]

I know of ArcGIS Tracking analyst and QGIS Time Manager. I have a transportation network with time based schedule for buses. I will create time aware shapefiles from this data. Is it possible to ...
4
votes
1answer
1k views

Using PostGIS for a large trajectory dataset

I have a spatial trajectory dataset which basically contains about 10E6 (lat,lon,time)-tuples, grouped together by an identifier so they form trajectories. Currently, SQLite is used to store the raw ...
4
votes
1answer
186 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 ...
4
votes
1answer
102 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 ...
4
votes
0answers
689 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 ...
4
votes
2answers
137 views

Prediction Population

I want to build a continuous data set with the population for 1970, 1981, 1991, 2001, 2011. I already have the population values for the same polygon, at sub-sections level (the lowest), for 1991, ...
3
votes
2answers
542 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 ...
3
votes
2answers
472 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 ...
3
votes
1answer
3k views

Using Time Slider and Time Format in ArcMap?

I have an .xls file that contains Lat/Longs as well as a time stamp in this format: hh:mm:ss AM/PM When I create a feature class shapefile out of this .xls file, ArcMap reads it in and displays it ...
3
votes
1answer
429 views

Spatio-temporal statistical analysis

I need to perform an anomaly analysis in both space and time. I have 4 data parameters: latitude, longitude, time and temperature. What I’m trying to do is to find temperature anomalies that are ...
3
votes
1answer
1k views

How to calculate “stop points” from a set of GPS tracklogs?

I have a set of GPS tracks pertaining to a cycling event that happened in the same day. I don't have much geographical information about the event itself, except for the tracklogs I downloaded from a ...
3
votes
1answer
725 views

Temporal coverages dynamically reloaded from data store in GeoServer

I'm pretty new to GeoServer. I would like to serve results of a simulation that concerns geospatial data as a Web Coverage Service (it has to be OGC compliant). The individual steps of the simulation (...
2
votes
1answer
1k views

How to Publish a Time Aware Mosaic dataset as an ImageService with Temporal component?

I have a Time Aware Mosaic dataset , which contains 5 rasters. I have entered the dates for the given rasters, by adding a Text Field with the dates. (The dates of the images are from 3/1/2013 to 3/5/...
2
votes
1answer
247 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 ...
2
votes
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
votes
1answer
131 views

Printing automated temporal selection of point features in QGIS?

I have a point layer with around 1.3 million features where one of the columns in the attributes table contains dates in the format YYYY-MM-DD. Starting from an arbitrary date, say 2001-01-01, I ...
2
votes
1answer
454 views

Using ASTER for time series analysis?

This is a follow up to Where to obtain free 15m ASTER image for New Mexico?. If I want to analyze 10 years or so, do I need to download each ASTER file for each year (e.g. 2003 ASTER, 2004 ASTER,...)...
2
votes
1answer
457 views

NetCDF file size calculation

I'm planning to use the NetCDF file format for storing my time-series observation data on a server. I would like to use the "NetCDF-CF" conventions. Before I start writing any scripts for importing ...
2
votes
1answer
73 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'...
2
votes
1answer
76 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) ...
2
votes
1answer
281 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 ...
2
votes
0answers
157 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 ...
2
votes
1answer
277 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,...
2
votes
0answers
245 views

Leaflet Temporal animation of marker clusters

I recently have applied the markercluster leaflet plug-in to my map and I was wondering if something like leaflet.timeline would be compatible with cluster visualization? if not is there any other ...
2
votes
0answers
65 views

I am working on layering GIS over time axile to visualize vehicle's movement in time [closed]

I am trying to combine time and latitude/longitude dimensions by layering calendar over map and essentially creating time-space map showing how vehicle moves in time and over the roads. Anybody have ...
2
votes
0answers
635 views

QGIS Points to Path Plugin Date/time error [closed]

I would like to use the Points to Paths plugin to plot the tracks of collared animals, exactly as specified on this page http://spatialgalaxy.net/2011/12/30/qgis-plugin-of-the-week-points-to-paths/ ...
1
vote
3answers
360 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.
1
vote
3answers
434 views

Visualizing multitemporal rasters scenes, side-by-side in QGIS?

I have to classify land cover/change every 2 months. Every 2 months about 5000 random selected points are classified, using L7/L8 images. For this, images from 5 different dates are show, side-by-side....
1
vote
1answer
976 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 ...
1
vote
1answer
97 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: ...
1
vote
1answer
37 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 ...
1
vote
2answers
89 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 ...
1
vote
1answer
131 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 ...
1
vote
1answer
93 views

How to Predict demand on a bus route, considering variaton in kms and price?

If there is a route (line) modification, I mean change on distance; and also a change on the price for the user. How can I calculate the demand on the next year, considering seasonnality. What would ...
1
vote
1answer
321 views

Does a graphic or graphicsLayer support time-awareness?

In the ArcGIS Server JavaScript API 2.6 I'm looking to implement map graphics. I can't see whether they support time-awareness. The help entry for graphicsLayer doesn't mention timeInfo, which is ...