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Landsat image data / project information

Not the only land image data but ..

The most accessible directly downloadable

Longest continuous record: 1972-present

Suitable resolution for northern environments

Suitable scale for landscape analysis

Landsat 7 ETM+ In late May, 2003, the Scan LineCorrector (SLC) mechanism on-board malfunctioned.

there are data in between stripes, and no stripes in the centre 10kmsee next slide

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Minimum

striping

Landsat: 40 Years of Global Land Observation Landsat 1 launched July 1972 (MSS) Landsat 2 launched Jan 1975 (MSS) Landsat 3 launched March 1978 (MSS) (80m res. x MIR) Landsat 4 launched July 1982 (TM) (30m res. + MIR) Landsat 5 launched March 1984 (TM) Landsat 6 launched Oct 1993 failed shortly after Landsat 7 launched April 1999, May 2003 SLC-Off (ETM+) (PAN) Landsat 8 launched February 2013 (OLI) 11 bands

http://landsat.usgs.gov/

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EO-1 launched November 2000: ALI (and Hyperion)Covering earth 1 minute after Landsat 7

Advanced Land Imager testing new technology for future Landsats

Pushbroom versus Whiskbroom; (fewer moving parts )3 extra bands + PAN (10m); 16 bit data (0-65,535)

See also data available on: http://glovis.usgs.gov

http://glovis.usgs.gov/http://glovis.usgs.gov/

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Landsat 8: Operational Land Imager

http://earthobservatory.nasa.gov/IOTD/view.php?id=81210

http://en.wikipedia.org/wiki/Operational_Land_Imagerhttp://earthobservatory.nasa.gov/IOTD/view.php?id=81210http://earthobservatory.nasa.gov/IOTD/view.php?id=81210http://earthobservatory.nasa.gov/IOTD/view.php?id=81210http://en.wikipedia.org/wiki/Operational_Land_Imagerhttp://en.wikipedia.org/wiki/Operational_Land_Imagerhttp://en.wikipedia.org/wiki/Operational_Land_Imager

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Landsat 8, first image: Fort Collins, CO

432 composite

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753 composite

Landsat Data Continuity Mission(LDCM)

Landsat 8 Thermal data

http://landsat.usgs.gov/LDCM_Image_Examples.php

http://landsat.usgs.gov/L8_band_combos.php

http://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/

Both OLI and TIRS create 12 bit data (0-2047)

11 bands, 12-bit (including 1 at 15m) v 7 bands 8-bit data= 800mb v 150mb (TM) zipfiles

http://landsat.usgs.gov/LDCM_Image_Examples.phphttp://landsat.usgs.gov/L8_band_combos.phphttp://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/http://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/http://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/http://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/http://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/http://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/http://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/http://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/http://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/http://blogs.esri.com/esri/arcgis/2013/07/24/band-combinations-for-landsat-8/http://landsat.usgs.gov/L8_band_combos.phphttp://landsat.usgs.gov/LDCM_Image_Examples.php

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Landsat 8 OLI: Best combinations for colour composites

Landsat data download

Landsat 5: 1984-2011

Landsat 7: 1999-2002 striped after May 2003

Landsat 8: 2013 much greater dataset size

Data downloadable from:http://glovis.usgs.gov

http://earthexplorer.usgs.gov

File options:

Georeferenced JPG (zip): ~ 10mb - resampled, lower resolution

Level 1 product: (zip) ~150mb = 7 x 60mb bands

Both websites have changed dramatically during this RS course ..

http://glovis.usgs.gov/http://earthexplorer.usgs.gov/http://earthexplorer.usgs.gov/http://glovis.usgs.gov/

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Landsat data download options

http://glovis.usgs.gov

Landsat 4-5 TM:

Landsat4 present: many striped scenes (Landsat 7)

Select (0 or) 10% maximum cloud cover

Downloadable in top left shows if it is immediately accessible

Otherwise, order for next day or day after? (email from RW)

Since the US govt time off, many Landsat 5 scenes taken offline

Conversely all Landsat 8 data seem to be online

Option of using georeferenced jpg files

Lower resolution - not suitable for very fine features

JPG only has bands 3,4,5cannot do Tassel Cap, but can do ratios etc..

Must open in arcmap, then data-> export data to TIF forPCI Geomatica (Focus)

-PCI Geomatica does not seem to recognise Geo-JPGformat does not see the georeferencing file

-Suitable if you have multiple scene dates

-Clip multiple scenes in same session using PCI Geomatica

http://glovis.usgs.gov/http://glovis.usgs.gov/

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Landsat data download

http://earthexplorer.usgs.gov

Doesnt need JAVA applet

Easier to pick location by mouse

Select 0-10 maximum cloud cover

No indication till ordering which scenes are downloadable

I could not quickly see how to request Level 1 product

More scenes seem to be listed can select by month

Project completion

1. Summary (~100 words)

2. Area description /location include image data reference

3. Image processing steps used can be point form

4. Image results Id suggest maybe these four:

the original image composite (subset),

a critical channel where appropriate e.g. ratio, the bitmap that you vectorised (after sieve) and final image with vectors superimposed.

Projects with two dates and mapping change might need 1-2 more.

You can use GIMP to grab screen imagesstart -> graphics -> Gimp (File-> Acquire -> screen shot)

5. Summary comments (you might have area statistics from POG )

http://earthexplorer.usgs.gov/http://earthexplorer.usgs.gov/