Chestertown, Maryland Metadata file: All satellite image files, TIF and Lan, were generated from the same Landsat 7 ETM+ scene. Included in the download folder are three Lan files that were generated using MultiSpec software. Due to different download speeds and educational applications a smaller Lan file, 597 by 443 pixels, was subsetted from the larger 1000 pixel by 1000 pixel file. Another larger Lan file was created to be used to study most of the Chester River watershed, 1560 pixel by 1730 pixel file. In addition to the Lan files, numerous color composite images were generated using MultiSpec. Each of these images enhances different features of the satellite image. The color composites were saved as Tif files and retain their geographic information. The Tif color composites were 2 percent tail clipped enhanced instead of showing the entire range of the data. If the entire range is needed then a new image needs to be generated using the MultiSpec display specification. (1) LAN files and name: 1999_07_05_Chest_large.lan, 18.449 Mb Lines: 1560 Number of bands: 7 Columns: 1730 Band Format: BIL 1999_07_05_Chest _.lan, 6.837 Mb Lines: 1250 Number of bands: 7 Columns: 1470 Band Format: BIL 1999_07_05_Chest _s_.lan, 1.809 Mb Lines: 597 Number of bands: 7 Columns: 443 Band Format: BIL In the file name is the following information: yyyy = four digit year of acquisition, mm = two digit month, dd = two digit day, PLACE = five letters of location, s = a subset of the image. If new files are generated from the Lan files using MultiSpecs' change image file format, then it is recommended that above data remain in the file name. Also this metadata file should be saved in the file folder to be referred to in the future. The Tif files use the same naming system for acquisition date and place name. In addition, the channels used to create the 3 channel color composite are included in the file name. The "chs" is the abbreviation for channels used by MultiSpec. After the "chs" are the Landsat 7 ETM + channel used. Below, see item number 3, which band of data corresponds to which number is explained. Additionally, you can refer to the Landsat PowerPoint presentationhttp://landsat.gsfc.nasa.gov/education/l7downloads/howto.html, to explain more about the uses of different color composite images. TIF files and name: 1999_07_05_Chest_l_chs321 18.4 Mb TIF files and name: 1999_07_05_Chest_l_chs432 18.4 Mb TIF files and name: 1999_07_05_Chest_l_chs542 18.4 Mb TIF files and name: 1999_07_05_Chest_l_chs742 18.4 Mb TIF files and name: 1999_07_05_Chest _chs321 7.907 Mb TIF files and name: 1999_07_05_Chest _chs432 7.907 Mb TIF files and name: 1999_07_05_Chest _chs542 7.907 Mb TIF files and name: 1999_07_05_Chest _chs742 7.907 Mb TIF files and name: 1999_07_05_Chest _s_chs321 0.776 Mb TIF files and name: 1999_07_05_Chest _s_chs432 0.776 Mb TIF files and name: 1999_07_05_Chest _s_chs542 0.776 Mb TIF files and name: 1999_07_05_Chest _s_chs742 0.776 Mb ---------------------------------- (2) Geographic information: UTM zone 18 N Pixel size= 30 meter, including the thermal band which is usually 60 meter resolution. The thermal band was resampled to create the .lan file. (3) Thermal band was included as channel 7 in the lan file. Which Landsat band is in which channel: Landsat 7 ETM+ channel 1= band 1(Blue, 0.45 - 0.52 um) Landsat 7 ETM+ channel 2= band 2(Green, 0.52 - 0.60 um) Landsat 7 ETM+ channel 3= band 3(Red, 0.63 - 0.69 um) Landsat 7 ETM+ channel 4= band 4(Near Infrared, 0.76 - 0.90 um) Landsat 7 ETM+ channel 5= band 5(Mid Infrared, 1.55 - 1.75 um) Landsat 7 ETM+ channel 7= band 6(Mid Infrared, 2.08 - 2.35 um) Landsat 7 ETM+ channel 6= band 7(Thermal Band, 10.4 - 12.5 um) --------------------------- (4) Acquisition date: July 05, 1999: Landsat 7 ETM+ Path: 014 Row: 033 BACKGROUND: The launch of the Landsat-7 satellite on April 15, 1999, marks the addition of the latest satellite to the National Aeronautics and Space Administration's Landsat satellite series. The Landsat-7 satellite carries the enhanced thematic mapper plus (ETM+) sensor and is part of an ongoing mission to provide quality remote sensing data in support of research and applications activities. Information on the Landsat-7 Program, including information about the Landsat-7 satellite, the ETM+ sensor, and Landsat-7 data collection, is available in the "Landsat 7 Science Data Users Handbook." http://lpgs-server.gsfc.nasa.gov/!LPGS_Baseline/LPGS_DFCB_Rev3(5.99).pdf