root / trunk / extensions / extTopology / config / com.iver.cit.gvsig.geoprocess.impl.generalization.GeneralizationGeoprocessPlugin / description_en.html @ 22909
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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>Linear Generalization</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>Linear Generalization</B> |
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</FONT>
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</P>
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<P>Linear Generalization is a kind of data compression algorithm. Consist in reduce the number of vertices needed to represent a linear geometry
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without modify its spatial identity. |
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</P>
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<P>
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<IMG SRC="generalization_desc.png" NAME="Imagen1" ALIGN=LEFT BORDER=0> |
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</P>
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<P>
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gvSIG supports two types of linear generalization: topologic and non-topologic. In topologic generalization geometry topology is preserved |
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(closed polylines will remain closed, polygon's holes will be contained in polygon's shell, etc.) |
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Non-topologic generalization is implemented with Douglas-Peucker algorithm. |
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Distance tolerance is a parameter to specify the compression level of the resulting geometries. |
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</P>
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</BODY>
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</HTML>
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