Le portail francophone de la géomatique

"le rectangle de délimitation minimum qui englobe l'objet spécifié",
cela veut dire qu'il y a un rectangle max à prendre en compte ?

This procedure will give you an MBR for each polygon within a MapInfo Table.

1. Make a copy of the Table for which you wish to determine MBR's and add 4
numeric (decimal) fields using Table-Maintenance-TableStructure. Name these new
4 fields, "MinX", "MinY", "MaxX" and "MaxY".


2. Use Table-UpdateColumn and enter the following;

Table to Update:        "Copied Table above"
Column to update:       "MinX"
Get value from Table:   "Copied Table above"
Value:  Use "Assist" to enter the expression, ObjectGeography(obj,1).

3. Repeat Step 2. for each of MinY, MaxX and MaxY. In the selection expression
replace (obj,1) with (obj,2) for MinY, and so on.. ie;

(obj,1) returns MinX
(obj,2) returns MinY
(obj,3) returns MaxX
(obj,4) returns MaxY

4. Save the Table and using Table-Maintenance-TableStructure, remove all fields
except for the newly created MBR fields, and the Polygon ID/Name field.

5. Save the Table again and use Table-Export to export to an ASCII comma
delimited text file.


NB: Tables which have undergone editing may require Packing to optimize MBR's,
though I suspect that the Table's you will be querying will be simple, and
packing will not be required. To Pack a Table use Table-Maintenance-PackTable.