I have created 250 square meter grids using the Grid Maker tool. I have given each grid a unique name. I want to find and store bounding co-ordinates (Latitude and Longitude) of each polygon in the Grid table along with the unique grid name. In short, I want to extract values that are displayed when you select "Get Info" upon Right-Click of any polygon. Please check screenshots for reference. I'm using MapInfo 15.

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Add 4 float columns to your table titled something like X1, Y1, X2, Y2. Then using Table > Update Column enter the following:

  • Update table: YourTable
  • Column to update: X1
  • Get value from table: YourTable
  • Value: ObjectGeography(obj, 1)

Click OK. This will update the X1 column with the minimum X value.

For Y1 change the column to update to Y1 and the Value to ObjectGeography(obj, 2) for the minimum Y value.

X2 will be ObjectGeography(obj, 3) and is the maximum X value, and finally Y2 will be ObjectGeography(obj, 4) for the maximum Y value.

  • Beat me by 3 minutes. Page 493 of this document. – Fezter Jun 16 '16 at 7:05
  • @T_Bacon Thank you so much for your help! This worked in seconds! – Divya Jun 16 '16 at 7:25

And if you prefer a statement for your MapBasic window:

Set CoordSys Table MYTABLE
   Set MIN_X = ObjectGeography(OBJ, 1)
     , MIN_Y = ObjectGeography(OBJ, 2)
     , MAX_X = ObjectGeography(OBJ, 3)
     , MAX_Y = ObjectGeography(OBJ, 4)

The first statement asks MapInfo Pro to use the coordinate system of the table when extracting coordinates.

The second does the actual update of the four columns.

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