Add conversion factor to floorimages table that specifies pixels per

meter for the image.

sql/database-create.sql

@@ -435,6 +435,7 @@ CREATE TABLE floorimages (
   x2 int(6) NOT NULL default '0',
   y2 int(6) NOT NULL default '0',
   scale tinyint(4) NOT NULL default '1',
+  pixels_per_meter float(10,3) NOT NULL default '0.000',
   PRIMARY KEY  (building,floor,scale)
 ) TYPE=MyISAM;
 

sql/database-migrate.txt

@@ -2184,3 +2184,9 @@ last_net_act,last_cpu_act,last_ext_act);
        and update the default rules:
 
        mysql tbdb < fwrules-create.sql
+
+1.289: Add conversion factor floorimages that converts from pixels to
+      meters.
+
+      alter table floorimages add pixels_per_meter float(10,3) \
+             NOT NULL default '0.000' after scale;