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.)

Filter by
Sorted by
Tagged with
1
vote
1answer
56 views
+50

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, ...
-1
votes
1answer
53 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 ...
2
votes
1answer
91 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'...
0
votes
0answers
38 views

Spatiotemporal analysis with polygons and points

In QGIS, I have a dataset of burned areas (polygons) and lightning strikes (points). In both datasets, I have the date of the fires, date of the lightning strikes, latitudes, and longitudes. However, ...
1
vote
1answer
38 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
494 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/...
1
vote
2answers
118 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 ...
2
votes
1answer
91 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) ...
0
votes
0answers
33 views

Keeping temporal data in separate tables using ArcGIS Pro?

I am trying to set up a temporal layer as outlined here (Note, I'm using ArcGIS Pro instead of ArcMap): http://desktop.arcgis.com/en/arcmap/10.3/map/time/temporal-data-in-separate-tables.htm My data ...
1
vote
1answer
116 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
0answers
118 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 (...
0
votes
0answers
46 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. ...
0
votes
1answer
177 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 ...
1
vote
0answers
126 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 ...
0
votes
1answer
916 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. ...
1
vote
0answers
78 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 ...
2
votes
1answer
283 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 ...
1
vote
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 ...
4
votes
0answers
743 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 ...
0
votes
1answer
70 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 ...
2
votes
1answer
262 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 ...
1
vote
0answers
29 views

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 ...
0
votes
1answer
244 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) ...
3
votes
2answers
597 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 ...
1
vote
0answers
339 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 ...
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 ...
3
votes
2answers
489 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 ...
1
vote
1answer
135 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 ...
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
288 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,...
1
vote
1answer
661 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 ...
1
vote
3answers
362 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.
5
votes
1answer
810 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
103 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
1answer
187 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 ...
3
votes
1answer
431 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 ...
2
votes
0answers
248 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 ...
1
vote
1answer
75 views

Different kinds of time+spatial data

I work on a geospatial aggregator. We support certain kinds of temporal data, but we don't have clear names for the different types, and I don't have a clear understanding of the range of geospatial+...
2
votes
1answer
138 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
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 ...
0
votes
2answers
862 views

Leaflet TimeSlider not showing points correctly

I'm trying to add about 13 thousand points in a map using the TimeSlide plugin, but my points are not following a logical order of appearance. When I use the slider I get the dates in the box below in ...
1
vote
3answers
454 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
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 ...
6
votes
1answer
293 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 (...
1
vote
0answers
169 views

Weekly raster data for temperature and precipitation in US

I am looking for weekly raster data for US for temperature and precipitation. All the major datasets PRISM, WorldClim etc. are either on a monthly scale or daily scale. I was wondering if anyone has ...
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
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, ...
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 ...
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 ...
2
votes
1answer
462 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 ...