Hi Juanse, Making a buffer say half the width of the street will probably end up giving a rather useless result due to varying street widths as Mike says.
One way to overcome this is to first make a common buffer around similar blocks with a width of 4 * desired width, and then "invert" these buffers by 3 * desired width (i.e. -3*w). This approach will "over smooth" the concave parts somewhat, but it covers indention between individual source blocks quite nicely. But the manual approach suggested by Woody Woodruff is definitely also an option. Best regards/Med venlig hilsen Lars V. Nielsen GisPro, Denmark http://www.gispro.dk/ http://hjem.get2net.dk/lars-online/ WGS84: 10.20'40"E 55.20'20"N ----- Original Message ----- From: "Hankins, Mike" <[EMAIL PROTECTED]> To: "'Juanse'" <[EMAIL PROTECTED]>; "MapInfo-L (E-mail)" <[EMAIL PROTECTED]> Sent: Monday, January 27, 2003 3:18 PM Subject: RE: MI-L block to neighbourhood I would suggest creating a buffer around each polygon the would put your blocks in the middle of the street. MI should be able to do that. Only thing you have to worry about is if some streets are wider than others. Mike H. -----Original Message----- From: Juanse [mailto:[EMAIL PROTECTED]] Sent: Saturday, January 25, 2003 8:05 AM To: MapInfo Subject: MI-L block to neighbourhood Hi everyone I am working for this municipal client and need to combine street blocks (polygons) to form the neighbourhood polygon but with the aditional trick that the "empty spaces" between the block (equivalent to the street public land) desapear so as to form a continuos polygons �does it sound coherent?. If I do the "object/set target/combine" operation offer by mapinfo I end up with one polygon that is formed by the block polygons with nothing in the empty space between the block. Any ideas on how to do this as automatically as possible?. Yes I do have a field in the block table that stores the neighborhood attribute for performing the select. [] [] [] [] __ |__| Juanse temuko-Chile --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.441 / Virus Database: 247 - Release Date: 09/01/03 -------------------------------------------------------------------------------- > --------------------------------------------------------------------- > List hosting provided by Directions Magazine | www.directionsmag.com | > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > Message number: 5169 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 5182
