Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_63459 ( "Township" text, "County" text, "Pop. (2010)" real, "Land ( sqmi )" real, "Water (sqmi)" real, "Latitude" real, "Longitude" real, "GEO ID" real, "ANSI code" real )

### Question ###
Van Meter has a water(sqmi) of 0 and a longitude larger than -98.444062, what was their highest ANSI code?

### Accurate SQL ###

SELECT MAX("ANSI code") FROM table_63459 WHERE "Water (sqmi)" = '0' AND "Township" = 'van meter' AND "Longitude" > '-98.444062'