The following 27 Landsat-7 ETM+ scenes were used for mapping much
of the country within and overlapping the 24 regions of interest
for which mineral resource-related and supporting GIS data are
being compiled:
elp151r036_7t20010928
elp152r034_7t20010802
elp152r035_7t20010802
elp152r036_7t20011005
elp152r037_7t20001018
elp153r034_7t20010708
elp153r035_7t20010708
elp153r036_7t19991007
elp153r037_7t20001025
elp154r035_7t20010629
elp154r036_7t20010629
elp154r037_7t20000525
elp154r038_7t20010629
elp155r036_7t20010503
elp155r037_7t20010503
elp155r038_7t20010503
elp155r039_7t20010503
elp155r040_7t20010503
elp156r036_7t20010627
elp156r037_7t20010627
elp156r038_7t20010510
elp156r039_7t20010510
elp157r036_7t19990816
elp157r037_7t20010517
elp158r035_7t20010711
elp158r036_7t20000708
elp158r037_7t20010625
Additional metadata and description of these scenes (including sun-
angle information) are provided by Davis (2006) and tabulated based
on scene path and row ID order. For example, all of the 27 scenes
used here were acquired either during latest spring(May), summer
(June through August), or earliest fall (September),
with high sun angles greater than 55-60°. Although high sun-angle
scenes are preferable for spectral classification methods used to
derive mineral and lithologic maps (for example, Mars and Rowan,
2007), low sun-angle scenes (for example, latest fall, winter, and
earliest spring) are preferable for lineament mapping (Sabins, 2007).
In this case, other than scene-edge boundaries, no attempt was made
to correct lineament errors, such as mapped ridgeline and catchment
boundaries, which are usually enhanced under high sun-angle lighting
conditions (for example, Hung and others, 2005).