[Gvsig_english] Problems with shapefiles with POLYLINE M geometry

ernesto sferlazza e.sferlazza at gmail.com
Wed Jan 2 11:28:07 CET 2008


Hi all
I have encountered problems working with GVSG when I use shapefiles with
"Polyline M" geometry. This kind of geometry allows to store linear
coordinates along a polyline feature. It works well using ESRI software, but
also with Quantum Gis and other GIS sw, except with GVSIG, since the
shapefile appears in the Table of contents as a polygonal item, while no
feature can be visualized in the geographic display area. It is also
possible to open the attribute table and see all the records.
This kind of feature is used in Italy for the the road rapresentation in the
"DB PRIOR" geographic database (database degli "strati prioritari") created
for the INTESAGIS project. An example of  this kind of shapefile can be
downloaded from the following link:
http://213.21.159.40/sportellocartografico/home.jsp
You can download, for example, Strade_Napoli.zip and then exctract
"tratti_di_strada_m.xxx" files.
Best regards

ing. Ernesto Sferlazza
responsabile Unità Organizzativa Sistema Informativo Territoriale
della Provincia regionale di Agrigento
piazza Aldo Moro, 1 - 92100 AGRIGENTO
tel 0922 401935
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