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Research for GIS Map Symbol Lib Exchange Format
 Figure1.XML Schema Structure View of Symbol Set Figure 2 is detail of point symbol structure. It is composed of type and graphic element. The type should be one of isolated point, line string, spline curve, circle, ellipse, arch, rectangle, round rectangle and polygon.  Figure 2. XML schema structure view of point symbol Graphic element data of each subset are different, as shown in figure 3. Graphic element data of isolated points are consisted of number of points, coordinate of points and color. The data of line string and spline curve is consisted of number of points, coordinate of points, width and color of line. The data of polygon, circle, ellipse, arch, rectangle, round rectangle all are consisted of coordinates, width of the shape border, if it is fill, and the full color.  Figure 3. XML schema structure view of variety point graphics element Data structure of line symbol is shown in Figure 4. It is consisted of number of segment and data of segment. Every segment is consisted of length of segment, width of segment, offset distance form baseline, type of segment, and point symbol (if it has). The type of segment is one of fill segment (color of fill, width of border and color of border), space segment (nothing to draw) and especial segment (if close head, width of fill and color of fill), |