<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>D. H. Scott</dc:contributor>
  <dc:creator>K. L. Tanaka</dc:creator>
  <dc:date>1987</dc:date>
  <dc:description>&lt;p&gt;&lt;span class="TextRun SCXW185589810 BCX8" lang="EN-US" xml:lang="EN-US" data-contrast="auto"&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;These geologic maps of the north and south polar regions of Mars, extend&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;ing to 55&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;˚&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt; north and south latitudes, overlap by 2&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;˚&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt; the geologic maps of the western and eastern regions, which extend to &lt;/span&gt;&lt;span class="SpellingError SCXW185589810 BCX8"&gt;lat&lt;/span&gt; &lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;±&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;57&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;˚&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;. The maps were compiled from Viking medium-resolution photomosaics at scales of 1:2,000,000 and from &lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;higher resolution Viking images. The quality and resolution of the Viking pictures are superior to those of Mariner 9 used to prepare&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt; the previous maps (Scott and &lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;Carr&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;, 1978) that includes these two regions. Because of the Viking orbital configuration, a vast number of high-resolution images of the area within 10&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;˚ &lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;of the north &lt;/span&gt;&lt;span class="ContextualSpellingAndGrammarError SCXW185589810 BCX8"&gt;pole&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt; was obtained, whereas many areas in lower northern latitudes were covered only by low-resolution &lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;images. In contrast, the south polar region is nearly completely covered by images at medium resolution but is not image&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt;d&lt;/span&gt;&lt;span class="NormalTextRun SCXW185589810 BCX8"&gt; at high resolution.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/i1802C</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>Geologic map of the polar regions of Mars</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>