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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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34 views

Landsat temporal images or scenes not overlapping each other [closed]

I am new to Landsat images. I am trying to gather temporal images of Landsat 7. First I downloaded images of same path and row for same place in different time stamp. I then then cropped a square ...
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2answers
42 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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44 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
63 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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21 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 ...
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1answer
65 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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110 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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37 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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24 views

Is Sentinel-2A Band 8 (NIR band) has been affected by earth water vapor absorption feature?

I am starting working with S2A images. While looking at the bandwidth of S2A NIR band, it seems it has a wider area as Landsat-7 ETM+ NIR band. Previously I worked with L7 ETM+ NIR band and obtained ...
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1answer
146 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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111 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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1answer
731 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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62 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
263 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
796 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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583 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
68 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
212 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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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 ...
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1answer
220 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
456 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 ...
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301 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
155 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
419 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
124 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
263 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
625 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
355 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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1answer
738 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
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1answer
101 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
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1answer
175 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 ...
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1answer
420 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
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0answers
238 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 ...
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1answer
74 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
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1answer
128 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
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0answers
64 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 ...
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2answers
777 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 ...
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3answers
395 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....
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1answer
92 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
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1answer
284 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 (...
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0answers
162 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
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1answer
1k 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 ...
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2answers
134 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
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1answer
484 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 ...
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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
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1answer
432 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
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1answer
445 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,...)...
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0answers
621 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/ ...
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98 views

Indexing GIS data associated with user with timestamp

I have data for each user in this format user1:(timestamp,lattitude,longitude) user1:(timestamp1,lattitude1,longitude1)..... Here the 1 at the end of timestamp/lat/long is to specify a different ...