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The Interactive Mapping Along the Upper Texas Gulf Coast map
service allows you to view remotely sensed data at multiple
resolutions. The map service was developed by the Texas Natural
Resources Information System (TNRIS) in cooperation with the Center
for Space Research of the University of Texas at Austin. This map
service uses Arc Internet Map Server (ArcIMS) to deliver maps to your
Internet browser.
ArcIMS is an Internet-based tool that enables users to view both
vector and raster geographic datasets. The site is best viewed with
either Internet Explorer 5.0 or Netscape Navigator 4.7. Once the site
is accessed, the map viewing area may not respond to resizing of the
browser window, so it is best to resize ahead of time. The ArcIMS
site will appear in a separate window that can be dismissed without
losing the connection to the Texas Infomart.
In ArcIMS, thematic data are organized into layers. The
ArcIMS interface allows users to generate new maps in their Internet
browser window by selectively turning on layers. This map service is
scale-dependent. As you zoom in, different layers become available.
Pass the cursor over the icons in the upper lefthand corner of the
map service to see explanatory Tool Tips. The icon featuring the red
square outline is currently active.
The available raster layers include MODIS, Landsat 7 ETM+, HYMAP
hyperspectral data, and Digital Orthophoto Quads (DOQs). For all
raster data except DOQs, several color composite combinations are
available. Use the visible checkbox option and the Refresh Map button
to choose the preferred data for viewing.
MODIS are available throughout the map service. Landsat 7 ETM+
data are available throughout most of the map service area,
particularly in the 742 band combination. HYMAP data are available
along the Bolivar peninsula and DOQs are available within the area of
the layer entitled Boundaries of Available Quarter Quads.
Several vector datasets are available at different resolutions.
Use the Identity tool to select a feature of interest in an
active vector layer.
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