a confusion on grid typea confusion on grid typehttps://oss.deltares.nl/c/message_boards/find_thread?p_l_id=1806765&threadId=1351132021-02-25T03:04:26Z2021-02-25T03:04:26Za confusion on grid typeHailiang Shenhttps://oss.deltares.nl/c/message_boards/find_message?p_l_id=1806765&messageId=1351122012-04-22T14:09:10Z2012-04-22T14:04:35ZHello All, <br />I am trying to understand two types of grid: curvilinear grid, and orthogonal curvilinear grid. <br /><br />In RGFGRID manual page 86 (the page no. at footnote), in "Restriction:" : "the grid must be orthogonal". My questions are: <br />1 RGFGRID is for curvilinear grid development, not just orthogonal curvilinear grid, right? So where else to store grid that are not orthogonal, other than the .grd file(s)?<br />2 What does "orthogonal" exactly mean in delft3d? Are every grid line perpendicular to each other? It seems very unlikely for curved boundary. May be I understand the term "orthogonal" in a wrong way. <br />3 Will QUICKIN work correctly on both curvilinear grid and orthogonal curvilinear grid? Will the resulting .dep file store corresponding point elevation correctly for the both types of grid?<br /><br />Thanks for your inputs,<br />HailiangHailiang Shen2012-04-22T14:04:35Z