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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML>
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<HEAD>
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        <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=windows-1252">
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        <TITLE>Voronoi</TITLE>
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</HEAD>
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<BODY LANG="es-ES" DIR="LTR">
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<P>
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<FONT COLOR="#800000">
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<B>Spatial adjust</B>
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</P>
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<P>
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Spatial adjust geoprocess applies a spatial transform on features of a vectorial layer.<br>
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Transforms actually supported by gvSIG are:
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<ul>
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<li>Projective.</li>
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<li>Affine.</li>
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<li>Similarity.</li>
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<li>Bursa Wolf.</li>
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<li>Differential Rubber sheeting.</li>
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<li>Affine with constrainst.</li>
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</ul>
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The number of supported transformations could be extended by using gvSIG API.
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<IMG SRC="spatial_adjust_desc.gif" NAME="Imagen1" ALIGN=LEFT BORDER=0>
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<P>
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This geoprocess needs a set of control points, with the coordinates of a point before and after the transformation.
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<br>Each transformation will require a minimum number of control points. Usually we are going to use more points than the minimum,
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improving the quality of the transformation by a root mean square adjust.
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To give an idea of the quality of the transformation the geoprocess will provide a root mean square error for each control point,
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and a global root mean square error.
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