Hi, One way to achieve this, would be using Seamless tables. I know mostly seamless tables are used for raster files, but they can also be used for vector files.
This does require that the tables have the same table structure (same columns and same order of these) So you could make a seamless table containing your utilities. When the user pens this table, the user will actually open up all 4 tables. MapInfos next generation Desktop GIS will support the concept of grouped layers, but that doesn't help you at the moment. Peter Horsbøll Møller GIS Developer, MTM Geographical Information & IT COWI A/S Odensevej 95 DK-5260 Odense S. Denmark Tel +45 6311 4900 Direct +45 6311 4908 Mob +45 5156 1045 Fax +45 6311 4949 E-mail [EMAIL PROTECTED] http://www.cowi.dk/gis "For enden af regnbuen..." - hvordan kommer man dertil og er det overhovedet muligt? Læs mere om årets MapInfo konference på www.cowi.dk/mapinfokonference -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Thoen Sent: Friday, July 21, 2006 3:45 PM To: greg Cc: mapinfo-l@lists.directionsmag.com Subject: Re: [MI-L] layer grouping On Fri, Jul 21, 2006 at 09:45:34PM +1200, greg wrote: > does anyone know if i can (MI 8.5) group layers for layer management. > eg lets say 1 want to display utilities. utilities may comprise of 4 > layers (say water, waste water, stormwater etc). i want users not to > have to click to turn on each layer, but just click to turn on > utilities - then easily switch to say zoning (which again may comprise > many layers) MapInfo doesn't support this concept, but it sure would be a nice feature. But it's not a straight-forward problem if you also want to manage layer position control (e.g. do the Utilities power lines display above the Hydrology group's rivers and the Transportation group's roads?) However, building a higher-level layer control that allowed the user to work with layer groups to the extent of turning their display on and off, either as a group or individually, would be do-able and would be useful. I've seen one application where this was done using a Visual Basic tree control connected to MapInfo via DDE, which worked quite well. But it was rather hard-coded for the application and wouldn't work for general use. This is a tool that still needs to be built. (So if anyone's bored some day and is looking for a small project they could sharpen their MapBasic skills on, this might be just the thing! - Bill Thoen _______________________________________________ MapInfo-L mailing list MapInfo-L@lists.directionsmag.com http://www.directionsmag.com/mailman/listinfo/mapinfo-l _______________________________________________ MapInfo-L mailing list MapInfo-L@lists.directionsmag.com http://www.directionsmag.com/mailman/listinfo/mapinfo-l
