Laserfiche WebLink
MEMO -TASK 90.1 <br />the 1980s and early 1990s were replaced with more recent data from the late 1990s. The horizontal <br />ground resolution of the Weld County imagery is less than 1 meter. A small portion of IRS and Landsat <br />imagery, with a horizontal ground resolution of 6 meters and 15 meters respectively, was used to fill in a <br />small portion of the eastern edge of the study area where orthophotos were not available. The sources of <br />data used to construct the image base map are described in Table 1 and Figure 2. The source date of the <br />imagery used for this image database ranges from 1988 to 2002, with the majority of images from 1998 or <br />1999 (Table 2 and Figure 3). <br />The source imagery in the distributable version of the image base map varies from the non-distributable <br />version. As described above, for the distributable image base map, Weld County is made up of USGS <br />DOQQs. The dates of the imagery range from 1988 to 1998, and a portion of Weld County is unavailable <br />(Figure 4). <br />Page 2 of 8 flilversFde Technology, lnc, <br />Wamr Resoarccs Engineering and Cunsuiting <br />Figure 1. Example of DOQQ Used to Compile Image Base Map <br />