User`s guide

19-3
Version 2.3 Previous Versions
The Zone field contains [] if the UTM zone
is not applicable or was missing from the
metadata.
The Zone field contained 32767 if the UTM
zone was not applicable or was missing
from the metadata.
Utility Functions for NaN-Separated Polygons and Lines
closePolygonParts
Closes all rings in a multipart polygon to ensure proper analysis and rendering.
isShapeMultipart
Boolean-valued function that returns true if a polygon or line has multiple parts.
removeExtraNanSeparators
Eliminates redundant NaN separators that might exist in polygons and lines.
Standardized Vector Topology in coast.mat
Polygons in the low-resolution coastline sample data file coast.mat now follow
the convention used by geoshow, mapshow, and mapview to display polygons with
“holes” (inner rings representing lakes, inland seas, and islands within them). Outer
contours now always run clockwise and inner contours run counterclockwise. These edits,
which reversed the order of vertices in some rings, enable the display functions to fill
outer rings properly while leaving inner rings blank.
Three New Demos
If you are viewing these release notes using the Help browser, clicking any of the demo
links below will open the demo in a browser window. Click the links at the top of that
window to view or run the code for the demo.
Converting Coastline Data (GSHHS) to Shapefile Format
Shows how to extract coastlines from the Global Self-consistent Hierarchical High-
resolution Shorelines (GSHHS) data set, manipulate the polygon features, and save the
result to a polygon shapefile.