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<title>Basic Operation</title>
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:0in;
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margin-bottom:.0001pt'><b><span style='font-size:13.5pt'>Basic Operation<o:p></o:p></span></b></p>
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:0in;
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margin-bottom:.0001pt;text-align:justify'>To convert a set of coordinates from
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one coordinate system or map projection to another, and/or transform it from
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one datum to another, follow these steps:</p>
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:.25in;
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margin-bottom:.0001pt;text-align:justify;text-indent:-.25in'>1.<span
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style='mso-tab-count:1'>�� </span>If the desired input coordinate reference
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frame type is not already displayed in the upper half of the window, select the
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desired entry from the pull-down list. The upper half of the window will be
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updated to display the appropriate parameter and coordinate fields for the
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selected input coordinate reference frame type.</p>
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:.25in;
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margin-bottom:.0001pt;text-align:justify;text-indent:-.25in'>2.<span
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style='mso-tab-count:1'>�� </span>If the desired input datum is not already
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displayed in the upper half of the window, select the desired datum using the
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Datum pull-down list. (In the Windows version, click on the arrow to open the
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list, use the scroll bars if necessary to bring the desired entry into view,
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then select it by clicking on it. In the Motif version, click on the arrow
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button to open the list, use the scroll bar if necessary to bring the desired
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entry into view, then select it by double clicking.) The datum list contains
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global datums (WGS-84 and WGS-72) first, followed by seven-parameter local
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datums, and then by local 3-parameter datums, with each section in alphabetical
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order. When you select a datum, the Ellipsoid field is updated to show the code
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and name of the ellipsoid associated with the selected datum. (Note: you cannot
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select a specific ellipsoid directly.)</p>
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:.25in;
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margin-bottom:.0001pt;text-align:justify;text-indent:-.25in'>3.<span
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style='mso-tab-count:1'>�� </span>If the input coordinate reference frame has
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any parameters associated with it (e.g., a central meridian), and the default
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parameter values displayed in the upper half of the window are not the desired
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values, change the parameter values by selecting the displayed values and
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typing over them.</p>
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:.25in;
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margin-bottom:.0001pt;text-align:justify;text-indent:-.25in'>4.<span
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style='mso-tab-count:1'>�� </span>Enter the input coordinates in the fields
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displayed in the upper half of the window by selecting each field and typing
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over its contents.<span style="mso-spacerun: yes">� </span>Optionally, specify
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the accuracy of the input coordinates by entering values, in meters, in the 90%CE,
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90%LE, and 90%SE fields, or by selecting an entry from the Sources pulldown
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:.25in;
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margin-bottom:.0001pt;text-align:justify;text-indent:-.25in'>5.<span
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style='mso-tab-count:1'>�� </span>If the desired output coordinate reference
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frame type is not already displayed in the lower half of the window, select the
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desired entry from the pull-down. The lower half of the window will be updated
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to display the appropriate parameter and coordinate fields for the selected
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output coordinate reference frame type.</p>
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:.25in;
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margin-bottom:.0001pt;text-align:justify;text-indent:-.25in'>6.<span
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style='mso-tab-count:1'>�� </span>If the desired output datum is not already
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displayed in the lower half of the window, select the desired datum using the
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Datum pull-down list, just as for the input datum.</p>
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:.25in;
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margin-bottom:.0001pt;text-align:justify;text-indent:-.25in'>7.<span
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style='mso-tab-count:1'>�� </span>If the output coordinate reference frame has
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any parameters associated with it (e.g., a central meridian), and the default
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parameter values displayed in the lower half of the window are not the desired
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values, change the parameter values by selecting the displayed values and
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typing over them.</p>
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:.25in;
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margin-bottom:.0001pt;text-align:justify;text-indent:-.25in;mso-list:l0 level1 lfo2;
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tab-stops:list .25in .5in'><![if !supportLists]>8.<span style='font:7.0pt "Times New Roman"'>
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</span><![endif]>Click on the Convert: Upper-to-Lower button. The output
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coordinates will be displayed in the coordinate fields in the lower half of the
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window. The 90% circular, linear, and spherical error values will also be
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<p style='margin-top:6.0pt;margin-right:0in;margin-bottom:0in;margin-left:0in;
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geotrans2/help/basicops.htm
