New subdivisioning of package, and added red warnings during testing

2026-09-11 11:52:00 +08:00 · 2015-08-04 16:46:47 +02:00
parent 085592de6a
commit 0ebf57e798
22 changed files with 65 additions and 95 deletions
@@ -0,0 +1,70 @@
+
+
+def find(datumname, crstype, strict=False):
+    if not strict:
+        datumname = datumname.lower()
+    for itemname,item in globals().items():
+        if itemname.startswith("_"):
+            continue
+        try:
+            if hasattr(item, crstype):
+                itemname = getattr(item, crstype)
+                if not strict:
+                    itemname = itemname.lower()
+                if datumname == itemname:
+                    return item
+        except:
+            pass
+    else:
+        return None
+
+    
+
+
+class WGS84:
+    proj4 = "WGS84"
+    ogc_wkt = "WGS_1984"
+    esri_wkt = "D_WGS_1984"
+
+    ellipsdef = "" # ellipsoids.WGS84()
+    to_wgs84 = None
+
+class WGS72_BE:
+    proj4 = "" # no datum name, just ellips + towgs84 params...
+    ogc_wkt = "WGS_1972_Transit_Broadcast_Ephemeris"
+    esri_wkt = "D_WGS_1972_BE"
+
+    ellipsdef = "" # ellipsoids.WGS72()
+    to_wgs84 = 0,0,1.9,0,0,0.814,-0.38
+
+class NAD83:
+    proj4 = "NAD83" # no datum name, just ellips + towgs84 params...
+    ogc_wkt = "North_American_Datum_1983"
+    esri_wkt = "D_North_American_1983"
+
+    ellipsdef = "" # ellipsoids.WGS72()
+    to_wgs84 = None
+
+class NAD27:
+    proj4 = "NAD27"
+    ogc_wkt = "D_North_American_1927"
+    esri_wkt = "D_North_American_1927"
+    
+    ellipsdef = "" # ellipsoids...
+    to_wgs84 = None
+
+class SphereArcInfo:
+    proj4 = "" # no name
+    ogc_wkt = "D_Sphere_ARC_INFO" # confirmed but odd that uses D_
+    esri_wkt = "D_Sphere_ARC_INFO"
+
+    semimaj_ax = 6370997.0
+    inv_flat = 0.0
+
+class Unknown:
+    proj4 = "unknown" # no datum name, just ellips + towgs84 params...
+    ogc_wkt = "Unknown"
+    esri_wkt = "Unknown"
+
+    ellipsdef = "" # ellipsoids.WGS72()
+    to_wgs84 = None,None