<div dir="ltr">Hello, I have this output in the global attributes of a NetCDF, seemingly originating with USGS and a program called "GEOGRID" -  see print below. Does anyone happen to know what MAP_PROJ = 6 and GRIDTYPE = "C" stands for? <div><br></div><div>The CEN_LAT/CEN_LON are sensible but TRUELAT1/TRUELAT2 look like filler, but maybe they are recorded badly asit looks like an LCC form to me. </div><div><br></div><div>Appreciate any pointers. </div><div><br></div><div>Thanks!</div><div><br></div><div>Cheers, Mike. </div><div><br></div><div><br></div><div><div>// global attributes:</div><div><span style="white-space:pre">           </span>:TITLE = "OUTPUT FROM GEOGRID V3.2.1" ;</div><div><span style="white-space:pre">             </span>:SIMULATION_START_DATE = "0000-00-00_00:00:00" ;</div><div><span style="white-space:pre">            </span>:WEST-EAST_GRID_DIMENSION = 216 ;</div><div><span style="white-space:pre">             </span>:SOUTH-NORTH_GRID_DIMENSION = 145 ;</div><div><span style="white-space:pre">           </span>:BOTTOM-TOP_GRID_DIMENSION = 0 ;</div><div><span style="white-space:pre">              </span>:WEST-EAST_PATCH_START_UNSTAG = 1 ;</div><div><span style="white-space:pre">           </span>:WEST-EAST_PATCH_END_UNSTAG = 215 ;</div><div><span style="white-space:pre">           </span>:WEST-EAST_PATCH_START_STAG = 1 ;</div><div><span style="white-space:pre">             </span>:WEST-EAST_PATCH_END_STAG = 216 ;</div><div><span style="white-space:pre">             </span>:SOUTH-NORTH_PATCH_START_UNSTAG = 1 ;</div><div><span style="white-space:pre">         </span>:SOUTH-NORTH_PATCH_END_UNSTAG = 144 ;</div><div><span style="white-space:pre">         </span>:SOUTH-NORTH_PATCH_START_STAG = 1 ;</div><div><span style="white-space:pre">           </span>:SOUTH-NORTH_PATCH_END_STAG = 145 ;</div><div><span style="white-space:pre">           </span>:GRIDTYPE = "C" ;</div><div><span style="white-space:pre">           </span>:DX = 48918.09f ;</div><div><span style="white-space:pre">             </span>:DY = 48918.09f ;</div><div><span style="white-space:pre">             </span>:DYN_OPT = 2 ;</div><div><span style="white-space:pre">                </span>:CEN_LAT = -24.26f ;</div><div><span style="white-space:pre">          </span>:CEN_LON = 147.63f ;</div><div><span style="white-space:pre">          </span>:TRUELAT1 = 1.e+20f ;</div><div><span style="white-space:pre">         </span>:TRUELAT2 = 1.e+20f ;</div><div><span style="white-space:pre">         </span>:MOAD_CEN_LAT = -24.26f ;</div><div><span style="white-space:pre">             </span>:STAND_LON = 32.37f ;</div><div><span style="white-space:pre">         </span>:POLE_LAT = 60.31f ;</div><div><span style="white-space:pre">          </span>:POLE_LON = 321.38f ;</div><div><span style="white-space:pre">         </span>:corner_lats = -43.18129f, 14.5788f, 14.57882f, -43.18126f, -43.08284f, 14.64489f, 14.64489f, -43.08282f, -43.37204f, 14.78275f, 14.78277f, -43.37201f, -43.27347f, 14.84871f, 14.84871f, -43.27346f ;</div><div><span style="white-space:pre">                </span>:corner_lons = 83.15466f, 110.3886f, -175.1285f, -147.8946f, 82.91971f, 110.22f, -174.96f, -147.6597f, 83.00413f, 110.4739f, -175.2138f, -147.7441f, 82.76912f, 110.3056f, -175.0456f, -147.5091f ;</div><div><span style="white-space:pre">           </span>:MAP_PROJ = 6 ;</div><div><span style="white-space:pre">               </span>:MMINLU = "USGS" ;</div><div><span style="white-space:pre">          </span>:NUM_LAND_CAT = 24 ;</div><div><span style="white-space:pre">          </span>:ISWATER = 16 ;</div><div><span style="white-space:pre">               </span>:ISLAKE = -1 ;</div><div><span style="white-space:pre">                </span>:ISICE = 24 ;</div><div><span style="white-space:pre">         </span>:ISURBAN = 1 ;</div><div><span style="white-space:pre">                </span>:ISOILWATER = 14 ;</div><div><span style="white-space:pre">            </span>:grid_id = 1 ;</div><div><span style="white-space:pre">                </span>:parent_id = 1 ;</div><div><span style="white-space:pre">              </span>:i_parent_start = 1 ;</div><div><span style="white-space:pre">         </span>:j_parent_start = 1 ;</div><div><span style="white-space:pre">         </span>:i_parent_end = 216 ;</div><div><span style="white-space:pre">         </span>:j_parent_end = 145 ;</div><div><span style="white-space:pre">         </span>:parent_grid_ratio = 1 ;</div><div><span style="white-space:pre">              </span>:sr_x = 1 ;</div><div><span style="white-space:pre">           </span>:sr_y = 1 ;</div><div><span style="white-space:pre">           </span>:FLAG_MF_XY = 1 ;</div><div>}</div></div></div><div dir="ltr">-- <br></div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><span>Dr. Michael Sumner</span><br><span>Software and Database Engineer</span><br><span>Australian Antarctic Division</span><br><span>203 Channel Highway</span><br><span>Kingston Tasmania 7050 Australia</span><br><br></div></div>