1 / 10

Data acquisition and File structures

Data acquisition and File structures. Coco Rulinda (CGIS-NUR) for PGD 2009 Based on slides by Boudewijn van Leeuwen, ITC-RSG-GTS. Data Aquisition. Characteristics of an Image. Platform/Sensor Spectra Day time Time/Period/Availability Area Spatial resolution Processing level Price.

makani
Télécharger la présentation

Data acquisition and File structures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Data acquisition and File structures Coco Rulinda (CGIS-NUR) for PGD 2009 Based on slides by Boudewijn van Leeuwen, ITC-RSG-GTS Advanced Remote Sensing – PGD 2009

  2. Data Aquisition

  3. Characteristics of an Image • Platform/Sensor • Spectra • Day time • Time/Period/Availability • Area • Spatial resolution • Processing level • Price

  4. Selections • Platform/Sensor Airborne, Spaceborne, spatial resolution, spectra, number of bands, processing level • Time of the day/Time/Period/Availability Shadow, vegetation, archive, acquisition request • Area/Location 1 scene, multiple scenes, 1 path • Price Free, academic, commercial Subject 1

  5. Some Archives • EOS Data Gateway – very large number of sensors • GLCF – Cheap Landsat data • Earth Explorer – Landsat/ASTER, graphical interface • NOAA SAA – NOAA, AVHRR • Eurimage – many sensors, commercial

  6. Data sets A data set consists of: • One or more header files • One or more data files • Or a combined data and header file

  7. Image file

  8. Header File (.hdr) • Readable with e.g. Notepad • Small • Information: • Acquisition date • Path/Row • Corner coordinates • Rows/columns • Radiometric resolution • Calibration parameters • …

  9. HDF format

  10. Useful links • Earth Observing System Data Gateway http://edcimswww.cr.usgs.gov/pub/imswelcome/ • ITC’s Database of Satellites and Sensors: http://www.itc.nl/research/products/sensordb/searchsat.aspx • HDF Explorer http://www.space-research.pt/index.html • Java HDF Viewer http://hdf.ncsa.uiuc.edu/java-hdf-html/

More Related