English: Landforms of Iowa, based on public domain Iowa State Unversity Geograpical Map Server and Iowa DNR map. The Landforms are defined by Jean Prior (1991), ultimately based on Samuel Calvin's (1904) Drift Sheets of Iowa map.
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I created this work entirely by myself. Base map from Iowa DNR server, with ISUGIS rivers superimposed using ArcMap, trimmed in Photoshop
2008-07-29 14:02 Billwhittaker 2470×1584× (1458381 bytes) {{Information |Description=Landforms of Iowa, based on public domain Iowa State Unversity Geograpical Map Server |Source=I created this work entirely by myself. |Date=2008 |Author=~~~ |other_versions= }}
{{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Landforms of Iowa, based on public domain Iowa State Unversity Geograpical Map Server and Iowa DNR map.