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<DIV STYLE="text-align:Left;"><DIV><P><SPAN>Contour Indexing</SPAN></P><P><SPAN>This layer includes calculated index fields (e.g., IDX_5, IDX_10, etc.) that identify contour lines occurring at regular elevation intervals. Each field indicates whether a contour’s elevation falls on that interval. For example, IDX_5 identifies contours that occur every 5 elevation units, IDX_10 identifies contours every 10 units, and so on. Values are stored as 1 (true) when a contour matches the interval and 0 (false) otherwise.</SPAN></P><P><SPAN>These fields support cartographic styling and filtering. When symbolizing the layer, contours can be styled by these index fields so that major contours (larger intervals) are drawn with heavier line weights, while intermediate contours are drawn with thinner lines.</SPAN></P></DIV></DIV> |