Demetrio P. Zourarakis, Ph.D., GISP, CMS

GIS and Remote Sensing Analyst

GEOSPATIAL TECHNOLOGY*** A virtual workshop ***

Kentucky State UniversityTuesday June 16, 2020

Outline

• Educational resources

• Paradigm change

• Power of the cloud

• Provisioning/procuring

• Download sites

• Services

• Portal, Cloud, Living Atlas

• Demonstrations: ArcGIS Online, ArcMap, ArcGIS Pro

2Demetrio P. Zourarakis, Ph.D., GISP, CMS

Did you know???

• The term "remote sensing," first used in the United States in the 1950s by Ms. Evelyn Pruitt of the U.S. Office of Naval Research, is now commonly used to describe the science—and art—of identifying, observing, and measuring an object without coming into direct contact with it. This process involves the detection and measurement of radiation of different wavelengths reflected or emitted from distant objects or materials, by which they may be identified and categorized by class/type, substance, and spatial distribution.

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https://earthobservatory.nasa.gov/features/RemoteSensing

Demetrio P. Zourarakis, Ph.D., GISP, CMS

• Aerial photography (multispectral, i.e. 4 + bands) – small platform UAV-sUAS• “Real time” data acquisition• Mapping/surveying school grounds• Assessing plant stress, waterbody status (algal blooms), etc.)• Climate change: phenology and pollinators, micrometeorology, rainfall intensity changes

• Satellite and aerial imagery• Change detection of areas of ecologic/environmental interest• Urbanization• Water quality/quantity• Glaciers (cryosphere)• Desertification• Soils and crop production: erosion patterns• Natural and man-made disasters: hurricanes, wildfires, floods• Etc.

School Projects Using Sensor Data (NextGen – Core Content????)

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Lesson Plans Anyone?

• AmericaView: https://americaview.org/program-areas/education/land-cover-lessons/

• NASA: https://www.nasa.gov/stem/forstudents/9-12/index.html

• USGS: https://www.usgs.gov/science-support/osqi/yes/resources-teachers/grade-9-12-global-change

• NOAA: https://www.noaa.gov/education

• iGETT: http://www.igettremotesensing.org/

• GeoTech Center: http://www.geotechcenter.org/

• Google Earth Engine Timelapse: Quick Lesson Plan: https://i-biology.net/2017/01/23/googleearth-engine-timelaps-quick-lesson-plan/

• ArcGIS Earth: https://learn.arcgis.com/en/gallery/

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The Landsat example

• Mission/Program: Landsat

• Platform: Landsat 1, 2, 3, 4, 5, (6), 7, 8, … 9 -- satellites

• On-board sensors through the ages: • RBV (Return Beam Vidicon – 3 TV cameras)

• MSS (Multispectral Scanner System): 4 or 5 bands

• Thematic Mapper (TM): Multispectral scanning radiometer: 7 bands

• Enhanced Thematic Mapper (ETM+): same; 8 bands

• Operational Land Imager (OLI) + Thermal Infrared Sensor (TIRS): 11 bands

(https://directory.eoportal.org/web/eoportal/satellite-missions/l/landsat-9)

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Bands and Band MathExample: Landsat 8https://landsat.gsfc.nasa.gov/landsat-8/landsat-8-bands/

Band Number µm Resolution

1 0.433–0.453 30 m

2 0.450–0.515 30 m

3 0.525–0.600 30 m

4 0.630–0.680 30 m

5 0.845–0.885 30 m

6 1.560–1.660 30 m

7 2.100–2.300 30 m

8 0.500–0.680 15 m

9 1.360–1.390 30 m

10 10.6-11.2 100 m

11 11.5-12.5 100 m

Of its 11 bands, only those in the very shortest wavelengths (bands 1–4 and 8) sense visible light – all the

others are in parts of the spectrum that we can’t see. The true-color view from Landsat is less than half of

what it sees. To understand the value of all the bands, let’s look at them each in turn… The Bands...

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https://www.usgs.gov/media/images/landsat-8-oli-and-tirs-and-their-uses8

Demetrio P. Zourarakis, Ph.D., GISP, CMS

Multispectral Imager (MSI) covering 13 spectral bands (443–2190 nm), with a swath width of 290 km and a spatial resolution of 10 m (four visible and near-infrared bands), 20 m (six red edge and shortwave infrared bands) and 60 m (three atmospheric correction bands).

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•

https://pbs.twimg.com/media/Cr2V5GJUAAAU6DX?format=jpg&name=large10

Demetrio P. Zourarakis, Ph.D., GISP, CMS

Paradigm change (said Joseph Kerski…@ GeoEd 2020)

• Floppy disk

• CD/DVD

• Thumb drive

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Now…• Dropbox

• Google Drive

• Skydrive

• Box

• OneDriveDemetrio P. Zourarakis, Ph.D., GISP, CMS

Not so long ago …

Earth Explorer

https://earthexplorer.usgs.gov/

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Glovis

13Demetrio P. Zourarakis, Ph.D., GISP, CMS https://glovis.usgs.gov/app

Google Earth Engine

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https://explorer.earthengine.google.com/#workspace

ArcGIS Earth

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Stretch…

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Illustration borrowed from the book “Remote Sensing and Image Interpretation” by Lillesand, Kiefer and Chipman.”

Demo 1: ArcGIS Online

• Discovering Landsat 8 and Sentinel 2 data

• Adding an image layer

• Enhancing the image – creating band composite images (false color)

• Adding image services: https://kyraster.ky.gov/arcgis/rest/services/ImageServices/Ky_NAIP_2018_2FT/ImageServer

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Example of A.I. at work: Unsupervised Classification

https://people.utm.my/nurulhazrina/files/2015/05/L12-Unsupervised-classification.pdf

https://www2.geog.soton.ac.uk/users/trevesr/obs/rseo/unsupervised_classification.html18

Demetrio P. Zourarakis, Ph.D., GISP, CMS

Demo 2: ArcGIS for Desktop

• Using downloaded data

• Applying raster functions

• Band math

• Creating image derivatives (NDVI)

NDVI = (NIR — Red)/(NIR + Red)

• Image classification: A.I., kind of…

https://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/producing-signature-files-class-and-cluster-analysis.htm

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Demo 3: ArcGIS Pro

• Raster products

• Raster functions

• Adding services

• Etc. etc. etc.

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Questions?

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