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Aerial Videography Database Project

publicado 09/05/2017 14h04, última modificação 25/07/2017 17h14

About

The Validation Overflight for Amazon Mosaics (VOAM) aerial video survey was carried out in the Brazilian Amazon in 1999 to provide ground verification for mapping of wetland cover with the Global Rain Forest Mapping (GRFM) Project JERS-1 (Japanese Earth Remote Sensing Satellite) mosaics of the Amazon basin.

Here, we provide full access to high-resolution geocoded mosaics derived from the flight.

These geocoded mosaics were generated through a suite of software tools developed by the Computer Vision Lab of the Department of Computer

Science at the University of Massachusetts, maximizing its usefulness for environmental monitoring applications.


This is part of a LBA-ECO project:

Linking Remote Sensing of Variations in Inundation and Aquatic Vegetation with Regional Analyses of Carbon Dynamics in Amazon Wetlands. LC- 32.

The LBA Project

Our LBA investigation, which is conducted by senior investigators from UCSB, INPE and INPA, is a multi-scale analysis of inundation and wetland vegetation using optical and microwave remote sensing to address important aspects of the regional carbon dynamics of the Amazon basin.

The 1999 VOAM

The 1999 survey was conducted in June over the Legal Brazilian Amazon by INPE and University of California/Santa Barbara (UCSB).


The Aerial Survey Plane

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Brazil’s National Institute for Space Research (INPE) made available its Bandeirante aerial survey plane, which has a camera mount custom-built in which both cameras can operate in tandem and vertically oriented.


The Video Aquisition System

Developed by the Natural Resource Conservation and Computer Science of the University of Massachusetts at Amherst (UMASS) (Schultz et al., 1999) included:


video system



  • 2 Digital Camcorders: vertically oriented (one in wide-angle mode and one in zoom mode);
  • a Laser Ranger Finder (904 nm wavelength): which measured aircraft height above ground or canopy;
  • an AHRS- Attitude and Heading Reference System: which measured aircraft tip and tilt;
  • a system GPS: which received a real-time, differentially corrected GPS signal from the Omnistar commercial GPS satellite network;
  • a Horita GPS3 Timecode Generator: the differential GPS signal that was received by Trimble 132 GPS throught an externally mounted L-band receiver, was converted to SMPTE format by Horita, to encode the GPS signal on audio tracks of digital videotapes.


The Flight Lines

The flight lines were designed to provide coverage of intensive study sites for the LBA-ECO projects including:


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  • Human-Impacted Areas: secondary forests, selectively logged forests, and pastures;
  • Major Floodplains of:
    • Whitewater Rivers: central Solimões, Amazon, lower Purus, lower Japurá;
    • Blackwater Rivers: lower Negro, including Anavilhanas archipelago; lower Jaú; the Balbina Reservoir; interfluvial blackwater wetlands in the Jaú basin; blocked-valley lakes: Tefé, Mamirauá.

Methodology

Hess, L. L.; Novo, E. M. L. M.; Melack, J. M.; Slaymaker, D. M.; Steffen C.; Valeriano, D. M.; Mertes, L. A. K.; Krug, T.; Gastil, M.; Holmes, C. and Hayward, C. Geocoded digital videography for validation of land cover in the Amazon Basin. International Journal of Remote Sensing, v. 23, n. 7, p. 1241-1260, 2002.

Database

In the Database you will find movie files (.mp4) and geocoded mosaic files (.tif).Those files use standard names according to starting date and time, length of movie in seconds, and format: YYYYMMDD_HHMMSS_LLf
e.g. 199906_153700_30 w
(year, month, date, hour, minute, second, length, format).

Year: 1999; Month: June; Date: 3 to 24;
Hour, minute and second: GMT hour;
Length: 30 seconds for wide and 15 seconds for zoom;
Format: wide (w) or zoom (z)


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