Alter Table "myTable" ( add island Logical ) Interactive
select * from myTable where str$(objectInfo ( obj, 1)) = "7" into Regions
select * from Regions where str$(objectInfo ( obj, 21)) > "1" into
MultiPolygon
update MultiPolygon set island = str$( objectInfo ( Buffer ( obj, 50, 1 ,
"cm" ), 21)) > "1"
This will give you a logical field marking the objects with 'islands' over
2 cms away from the 'mainland' polygon.
Hope this is what you were looking for.
At 01:08 P.M. 24/11/2000 -0800, you wrote:
>Thanks for the help. I have gotten this far. I am really trying to
>distinguish between the multiple polygon regions, the polygons that are not
>adjacent and sharing nodes with any other polygons. In esence these are
>island polygons, not attached to the mainland! Any ideas are greatly
>appreciated
>
>Regards Kenn
>
>"Geograf�a y Electr�nica, SA de CV" wrote:
>
>> I believe you talk about multi-polygon regions.
>>
>> 1.- make a query of all region objects in the table
>> select * from Table where str$(objectInfo ( obj, 1)) = "7" into Regions
>>
>> 2.- Select those regions where there are more than 1 polygon.
>> select * from Regions where str$(objectInfo ( obj, 21)) > "1" into
>> MultiPolygon
>>
>> At 12:46 P.M. 22/11/2000 -0800, you wrote:
>> >Does anyone have any Map Basic tips to flag Island Polygons?
>> >
>> >Cheers Kenn
>> >
>> >
>> >
>> >_______________________________________________________________________
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>> ---------------------------------
>> Ing. Juan Pufleau Correa
>> Geograf�a y Electr�nica, SA de CV
>> Aguascalientes, Mexico
>> ---------------------------------
>
>
---------------------------------
Ing. Juan Pufleau Correa
Geograf�a y Electr�nica, SA de CV
Aguascalientes, Mexico
---------------------------------
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