improves stations srtm report

2 files changed, 197 insertions, 175 deletions

diff --git a/core/models/survex.py b/core/models/survex.py
index 7af8570..4c2c109 100644
--- a/core/models/survex.py
+++ b/core/models/survex.py
@@ -75,16 +75,25 @@ class SurvexStation(models.Model):
         return utmToLatLng(33, self.x, self.y, northernHemisphere=True)[1]
         
     def srtm_alt(self):
-        return height_from_utm(self.x, self.y) # height, distance from reference point
+        """Caches the srtm data so that searches are not done twice on the same page"""
+        if not hasattr(self,"srtm"):
+           self.srtm = height_from_utm(self.x, self.y) # height, distance from reference point
+        return self.srtm # (nearest point, nearest distance)
  
     def srtm_diff(self):
-        alt, ref = height_from_utm(self.x, self.y) # height, distance from reference point
+        alt, ref = self.srtm_alt()
         
         diff = alt - self.z
         if diff >= 0:
-            diff_str = f"<span style='color:blue'>+{diff:.0f}</span>"
+            colour = "blue"
         else:
-            diff_str = f"<span style='color:red'>{diff:.0f}</span>"
+            colour = "red"
+            
+        if abs(diff) > 60:
+            weight = "bold"
+        else:
+            weight = "normal"
+        diff_str = f"<span style='color:{colour}; font-weight:{weight}'>{diff:.0f}</span>"
        
         return diff_str, ref
  
diff --git a/core/utils.py b/core/utils.py
index 0d92738..c62dedb 100644
--- a/core/utils.py
+++ b/core/utils.py
@@ -24,7 +24,6 @@ It is a Global Object, see https://python-patterns.guide/python/module-globals/
 troggle.utils.TROG
 
 chaosmonkey(n) - used by survex import to regenerate some .3d files
-save_carefully() - core function that saves troggle objects in the database
 
 various git add/commit functions that need refactoring together
 
@@ -279,60 +278,60 @@ def writetrogglefile(filepath, filecontent):
     # not catching and re-raising any exceptions yet, inc. the stderr etc.,. We should do that.
 
 
-def save_carefully(objectType, coUniqueAttribs={}, otherAttribs={}):
-    """Looks up instance using coUniqueAttribs and carries out the following:
-        -if instance does not exist in DB: add instance to DB, return (new instance, True)
-        -if instance exists in DB and was modified using Troggle: do nothing, return (existing instance, False)
-        -if instance exists in DB and was not modified using Troggle: overwrite instance, return (instance, False)
+# def save_carefully(objectType, coUniqueAttribs={}, otherAttribs={}):
+    # """Looks up instance using coUniqueAttribs and carries out the following:
+        # -if instance does not exist in DB: add instance to DB, return (new instance, True)
+        # -if instance exists in DB and was modified using Troggle: do nothing, return (existing instance, False)
+        # -if instance exists in DB and was not modified using Troggle: overwrite instance, return (instance, False)
 
-    The checking is accomplished using Django's get_or_create and the new_since_parsing boolean field
-    defined in core.models.TroggleModel.
+    # The checking is accomplished using Django's get_or_create and the new_since_parsing boolean field
+    # defined in core.models.TroggleModel.
 
-    We are not using new_since_parsing - it is a fossil from Aaron Curtis's design in 2006. So it is always false.
+    # We are not using new_since_parsing - it is a fossil from Aaron Curtis's design in 2006. So it is always false.
 
-    NOTE: this takes twice as long as simply creating a new object with the given values.
+    # NOTE: this takes twice as long as simply creating a new object with the given values.
 
-    As of Jan.2023 this function is not used anywhere in troggle.
+    # As of Jan.2023 this function is not used anywhere in troggle.
 
-    """
-    try:
-        instance, created = objectType.objects.get_or_create(defaults=otherAttribs, **coUniqueAttribs)
-    except:
-        print(" !! - FAIL in SAVE CAREFULLY   ===================", objectType)
-        print(" !! - -- objects.get_or_create()")
-        print(f" !! - coUniqueAttribs:{coUniqueAttribs}\n !! - otherAttribs:{otherAttribs}")
-        raise
-    if not created and not instance.new_since_parsing:
-        for k, v in list(
-            otherAttribs.items()
-        ):  # overwrite the existing attributes from the logbook text (except date and title)
-            setattr(instance, k, v)
-        try:
-            instance.save()
-        except:
-            print(" !! - SAVE CAREFULLY   ===================", objectType)
-            print(" !! - -- instance.save()")
-            print(f" !! - coUniqueAttribs:{coUniqueAttribs}\n !! - otherAttribs:{otherAttribs}")
-            raise
-    try:
-        str(instance)
-    except:
-        pass
-    if created:
-        logging.info(str(instance) + " was just added to the database for the first time. \n")
+    # """
+    # try:
+        # instance, created = objectType.objects.get_or_create(defaults=otherAttribs, **coUniqueAttribs)
+    # except:
+        # print(" !! - FAIL in SAVE CAREFULLY   ===================", objectType)
+        # print(" !! - -- objects.get_or_create()")
+        # print(f" !! - coUniqueAttribs:{coUniqueAttribs}\n !! - otherAttribs:{otherAttribs}")
+        # raise
+    # if not created and not instance.new_since_parsing:
+        # for k, v in list(
+            # otherAttribs.items()
+        # ):  # overwrite the existing attributes from the logbook text (except date and title)
+            # setattr(instance, k, v)
+        # try:
+            # instance.save()
+        # except:
+            # print(" !! - SAVE CAREFULLY   ===================", objectType)
+            # print(" !! - -- instance.save()")
+            # print(f" !! - coUniqueAttribs:{coUniqueAttribs}\n !! - otherAttribs:{otherAttribs}")
+            # raise
+    # try:
+        # str(instance)
+    # except:
+        # pass
+    # if created:
+        # logging.info(str(instance) + " was just added to the database for the first time. \n")
 
-    if not created and instance.new_since_parsing:
-        logging.info(
-            str(instance) + " has been modified using Troggle since parsing, so the current script left it as is. \n"
-        )
+    # if not created and instance.new_since_parsing:
+        # logging.info(
+            # str(instance) + " has been modified using Troggle since parsing, so the current script left it as is. \n"
+        # )
 
-    if not created and not instance.new_since_parsing:
-        logging.info(
-            " instance:<"
-            + str(instance)
-            + "> existed in the database unchanged since last parse. It have been overwritten."
-        )
-    return (instance, created)
+    # if not created and not instance.new_since_parsing:
+        # logging.info(
+            # " instance:<"
+            # + str(instance)
+            # + "> existed in the database unchanged since last parse. It have been overwritten."
+        # )
+    # return (instance, created)
 
 """The following is a Bard converted version of Radosts's MIT copyrighted Javascript on 2023-10-27
     with hand-editing.
@@ -352,14 +351,28 @@ def height_from_utm(easting, northing):
 
 
 def find_nearest_point(points, target_point):
-    """Returns the nearest point to a target point from a list of points."""
+    """Returns the nearest point to a target point from a list of points.
+    
+    In our dataset, the survey stations are all within 30m of an srtm reference point.
+    So we can safely ignore points more than 100m away in either x or y directions.
+    
+    TO DO: store this list twice, once sorted by x and once sorted by y,
+    do a bounding box search for a set of nearby points before doing the exhaustive pythagorean distance search."""
     nearest_distance_squared = float("inf")
     nearest_point = None
     x_target, y_target = target_point
 
     for point in points:
         x, y, z = point
-        distance_squared = math.pow(x - x_target, 2) + math.pow(y - y_target, 2)
+        if z < 0:
+            distance_squared = 1000000.0 # ie ignore it
+        else:
+            if x - x_target > 100:
+                distance_squared = 10000
+            elif y - y_target > 100:
+                distance_squared = 10000
+            else:
+                distance_squared = math.pow(x - x_target, 2) + math.pow(y - y_target, 2)
 
         if distance_squared < nearest_distance_squared:
             nearest_distance_squared = distance_squared
@@ -397,13 +410,13 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407613.99, 5278008.61, 988.80],
 [407663.96, 5278007.54, 997.86],
 [407713.93, 5278006.46, 1006.82],
-[407763.64, 5278005.12, -32721.21],
-[407813.62, 5278004.05, -32721.21],
-[407863.59, 5278002.98, -32721.21],
-[407913.56, 5278001.90, -32721.21],
-[407963.53, 5278000.83, -32721.21],
-[408013.51, 5277999.76, -32721.21],
-[408063.48, 5277998.69, -32721.21],
+# [407763.64, 5278005.12, -32721.21],
+# [407813.62, 5278004.05, -32721.21],
+# [407863.59, 5278002.98, -32721.21],
+# [407913.56, 5278001.90, -32721.21],
+# [407963.53, 5278000.83, -32721.21],
+# [408013.51, 5277999.76, -32721.21],
+# [408063.48, 5277998.69, -32721.21],
 [408113.72, 5277997.88, 985.80],
 [408163.69, 5277996.81, 1033.79],
 [408213.66, 5277995.74, 1055.53],
@@ -546,14 +559,14 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407565.09, 5278059.66, 1013.11],
 [407615.06, 5278058.58, 1013.02],
 [407665.03, 5278057.51, 1024.36],
-[407714.74, 5278056.17, -32721.21],
-[407764.72, 5278055.09, -32721.21],
-[407814.69, 5278054.02, -32721.21],
-[407864.66, 5278052.95, -32721.21],
-[407914.63, 5278051.88, -32721.21],
-[407964.61, 5278050.80, -32721.21],
-[408014.58, 5278049.73, -32721.21],
-[408064.55, 5278048.66, -32721.21],
+# [407714.74, 5278056.17, -32721.21],
+# [407764.72, 5278055.09, -32721.21],
+# [407814.69, 5278054.02, -32721.21],
+# [407864.66, 5278052.95, -32721.21],
+# [407914.63, 5278051.88, -32721.21],
+# [407964.61, 5278050.80, -32721.21],
+# [408014.58, 5278049.73, -32721.21],
+# [408064.55, 5278048.66, -32721.21],
 [408114.79, 5278047.86, 1081.46],
 [408164.76, 5278046.78, 1076.48],
 [408214.74, 5278045.71, 1088.82],
@@ -696,14 +709,14 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407566.16, 5278109.63, 1040.23],
 [407616.13, 5278108.56, 1049.02],
 [407666.11, 5278107.48, 1072.19],
-[407715.82, 5278106.14, -32721.21],
-[407765.79, 5278105.07, -32721.21],
-[407815.76, 5278103.99, -32721.21],
-[407865.73, 5278102.92, -32721.21],
-[407915.71, 5278101.85, -32721.21],
-[407965.68, 5278100.78, -32721.21],
-[408015.65, 5278099.70, -32721.21],
-[408065.62, 5278098.63, -32721.21],
+# [407715.82, 5278106.14, -32721.21],
+# [407765.79, 5278105.07, -32721.21],
+# [407815.76, 5278103.99, -32721.21],
+# [407865.73, 5278102.92, -32721.21],
+# [407915.71, 5278101.85, -32721.21],
+# [407965.68, 5278100.78, -32721.21],
+# [408015.65, 5278099.70, -32721.21],
+# [408065.62, 5278098.63, -32721.21],
 [408115.86, 5278097.83, 1128.52],
 [408165.84, 5278096.76, 1116.52],
 [408215.81, 5278095.68, 1118.92],
@@ -846,12 +859,12 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407567.24, 5278159.60, 1120.59],
 [407617.21, 5278158.53, 1131.95],
 [407667.18, 5278157.46, 1179.59],
-[407716.89, 5278156.11, -32721.21],
-[407766.86, 5278155.04, -32721.21],
-[407816.83, 5278153.97, -32721.21],
-[407866.81, 5278152.89, -32721.21],
-[407916.78, 5278151.82, -32721.21],
-[407966.75, 5278150.75, -32721.21],
+# [407716.89, 5278156.11, -32721.21],
+# [407766.86, 5278155.04, -32721.21],
+# [407816.83, 5278153.97, -32721.21],
+# [407866.81, 5278152.89, -32721.21],
+# [407916.78, 5278151.82, -32721.21],
+# [407966.75, 5278150.75, -32721.21],
 [408016.99, 5278149.95, 1195.85],
 [408066.96, 5278148.88, 1176.74],
 [408116.94, 5278147.80, 1161.64],
@@ -996,12 +1009,12 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407568.31, 5278209.58, 1204.19],
 [407618.28, 5278208.50, 1215.72],
 [407668.25, 5278207.43, 1228.74],
-[407717.96, 5278206.09, -32721.21],
-[407767.93, 5278205.01, -32721.21],
-[407817.91, 5278203.94, -32721.21],
-[407867.88, 5278202.87, -32721.21],
-[407917.85, 5278201.79, -32721.21],
-[407967.82, 5278200.72, -32721.21],
+# [407717.96, 5278206.09, -32721.21],
+# [407767.93, 5278205.01, -32721.21],
+# [407817.91, 5278203.94, -32721.21],
+# [407867.88, 5278202.87, -32721.21],
+# [407917.85, 5278201.79, -32721.21],
+# [407967.82, 5278200.72, -32721.21],
 [408018.06, 5278199.92, 1232.65],
 [408068.04, 5278198.85, 1206.84],
 [408118.01, 5278197.78, 1187.56],
@@ -1146,11 +1159,11 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407569.38, 5278259.55, 1238.53],
 [407619.35, 5278258.48, 1249.98],
 [407669.33, 5278257.40, 1259.04],
-[407719.03, 5278256.06, -32721.21],
-[407769.01, 5278254.99, -32721.21],
-[407818.98, 5278253.91, -32721.21],
-[407868.95, 5278252.84, -32721.21],
-[407918.92, 5278251.77, -32721.21],
+# [407719.03, 5278256.06, -32721.21],
+# [407769.01, 5278254.99, -32721.21],
+# [407818.98, 5278253.91, -32721.21],
+# [407868.95, 5278252.84, -32721.21],
+# [407918.92, 5278251.77, -32721.21],
 [407969.16, 5278250.97, 1278.95],
 [408019.14, 5278249.89, 1254.62],
 [408069.11, 5278248.82, 1233.50],
@@ -1296,11 +1309,11 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407570.45, 5278309.52, 1262.04],
 [407620.43, 5278308.45, 1273.13],
 [407670.40, 5278307.38, 1284.45],
-[407720.11, 5278306.03, -32721.21],
-[407770.08, 5278304.96, -32721.21],
-[407820.05, 5278303.89, -32721.21],
-[407870.02, 5278302.81, -32721.21],
-[407920.00, 5278301.74, -32721.21],
+# [407720.11, 5278306.03, -32721.21],
+# [407770.08, 5278304.96, -32721.21],
+# [407820.05, 5278303.89, -32721.21],
+# [407870.02, 5278302.81, -32721.21],
+# [407920.00, 5278301.74, -32721.21],
 [407970.24, 5278300.94, 1288.09],
 [408020.21, 5278299.87, 1273.43],
 [408070.18, 5278298.79, 1257.89],
@@ -3401,7 +3414,7 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407835.34, 5279003.78, 1585.78],
 [407885.31, 5279002.71, 1571.14],
 [407935.29, 5279001.63, 1564.67],
-[407984.99, 5279000.29, -32721.22],
+# [407984.99, 5279000.29, -32721.22],
 [408035.23, 5278999.49, 1551.80],
 [408085.20, 5278998.41, 1535.38],
 [408135.18, 5278997.34, 1538.16],
@@ -3551,7 +3564,7 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407836.41, 5279053.75, 1630.52],
 [407886.39, 5279052.68, 1627.79],
 [407936.36, 5279051.61, 1600.36],
-[407986.06, 5279050.26, -32721.22],
+# [407986.06, 5279050.26, -32721.22],
 [408036.30, 5279049.46, 1583.25],
 [408086.28, 5279048.39, 1574.44],
 [408136.25, 5279047.32, 1575.25],
@@ -3701,7 +3714,7 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407837.49, 5279103.73, 1674.12],
 [407887.46, 5279102.65, 1673.21],
 [407937.43, 5279101.58, 1637.87],
-[407987.13, 5279100.23, -32721.22],
+# [407987.13, 5279100.23, -32721.22],
 [408037.38, 5279099.43, 1620.63],
 [408087.35, 5279098.36, 1664.90],
 [408137.32, 5279097.29, 1642.14],
@@ -3740,9 +3753,9 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [409786.41, 5279061.88, 1089.81],
 [409836.39, 5279060.81, 1039.36],
 [409886.36, 5279059.73, 974.61],
-[409936.07, 5279058.39, -32721.23],
-[409986.04, 5279057.32, -32721.23],
-[410036.01, 5279056.24, -32721.23],
+# [409936.07, 5279058.39, -32721.23],
+# [409986.04, 5279057.32, -32721.23],
+# [410036.01, 5279056.24, -32721.23],
 [410086.25, 5279055.44, 872.81],
 [410136.22, 5279054.37, 875.58],
 [410186.19, 5279053.30, 879.97],
@@ -3851,7 +3864,7 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407838.56, 5279153.70, 1735.22],
 [407888.53, 5279152.63, 1719.94],
 [407938.51, 5279151.55, 1704.65],
-[407988.21, 5279150.20, -32721.22],
+# [407988.21, 5279150.20, -32721.22],
 [408038.45, 5279149.41, 1659.68],
 [408088.42, 5279148.33, 1718.80],
 [408138.40, 5279147.26, 1690.14],
@@ -3890,9 +3903,9 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [409787.49, 5279111.85, 1131.36],
 [409837.46, 5279110.78, 1091.02],
 [409887.43, 5279109.71, 1044.32],
-[409937.14, 5279108.36, -32721.23],
-[409987.11, 5279107.29, -32721.23],
-[410037.08, 5279106.22, -32721.23],
+# [409937.14, 5279108.36, -32721.23],
+# [409987.11, 5279107.29, -32721.23],
+# [410037.08, 5279106.22, -32721.23],
 [410087.32, 5279105.41, 883.61],
 [410137.29, 5279104.34, 892.85],
 [410187.27, 5279103.27, 898.81],
@@ -4001,7 +4014,7 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [407839.63, 5279203.67, 1775.12],
 [407889.61, 5279202.60, 1753.82],
 [407939.58, 5279201.53, 1738.66],
-[407989.28, 5279200.18, -32721.22],
+# [407989.28, 5279200.18, -32721.22],
 [408039.52, 5279199.38, 1702.16],
 [408089.50, 5279198.31, 1719.98],
 [408139.47, 5279197.23, 1709.71],
@@ -4040,11 +4053,11 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [409788.56, 5279161.83, 1172.86],
 [409838.53, 5279160.75, 1143.36],
 [409888.51, 5279159.68, 1118.90],
-[409938.21, 5279158.33, -32721.23],
-[409988.18, 5279157.26, -32721.23],
-[410038.16, 5279156.19, -32721.23],
-[410088.13, 5279155.12, -32721.23],
-[410138.10, 5279154.04, -32721.23],
+# [409938.21, 5279158.33, -32721.23],
+# [409988.18, 5279157.26, -32721.23],
+# [410038.16, 5279156.19, -32721.23],
+# [410088.13, 5279155.12, -32721.23],
+# [410138.10, 5279154.04, -32721.23],
 [410188.34, 5279153.24, 946.97],
 [410238.31, 5279152.17, 903.92],
 [410288.28, 5279151.09, 918.48],
@@ -4052,9 +4065,9 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [410388.23, 5279148.95, 907.40],
 [410438.20, 5279147.88, 901.78],
 [410488.17, 5279146.80, 891.89],
-[410537.88, 5279145.46, -32721.24],
-[410587.85, 5279144.39, -32721.24],
-[410637.82, 5279143.31, -32721.24],
+# [410537.88, 5279145.46, -32721.24],
+# [410587.85, 5279144.39, -32721.24],
+# [410637.82, 5279143.31, -32721.24],
 [410688.06, 5279142.51, 895.22],
 [410738.04, 5279141.44, 901.91],
 [410788.01, 5279140.37, 896.06],
@@ -4188,13 +4201,13 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [409689.69, 5279213.94, 1257.25],
 [409739.66, 5279212.87, 1221.70],
 [409789.63, 5279211.80, 1203.87],
-[409839.34, 5279210.45, -32721.23],
-[409889.31, 5279209.38, -32721.23],
-[409939.28, 5279208.31, -32721.23],
-[409989.26, 5279207.23, -32721.23],
-[410039.23, 5279206.16, -32721.23],
-[410089.20, 5279205.09, -32721.23],
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@@ -4202,9 +4215,9 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [410389.30, 5279198.92, 926.96],
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@@ -4338,23 +4351,23 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [409690.76, 5279263.92, 1291.99],
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@@ -4487,24 +4500,24 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [409641.86, 5279314.96, 1384.08],
 [409691.84, 5279313.89, 1325.11],
 [409741.81, 5279312.82, 1278.84],
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@@ -4637,24 +4650,24 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [409642.94, 5279364.94, 1408.99],
 [409692.91, 5279363.86, 1357.26],
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@@ -4787,10 +4800,10 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [409644.01, 5279414.91, 1441.79],
 [409693.98, 5279413.84, 1408.60],
 [409743.96, 5279412.76, 1399.64],
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 [410043.79, 5279406.32, 1308.57],
 [410093.76, 5279405.25, 1286.75],
@@ -4801,8 +4814,8 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [410343.62, 5279399.89, 1118.54],
 [410393.59, 5279398.81, 1069.38],
 [410443.57, 5279397.74, 1094.48],
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 [410593.48, 5279394.52, 1103.69],
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@@ -4937,10 +4950,10 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [409645.08, 5279464.88, 1476.78],
 [409695.06, 5279463.81, 1466.18],
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 [410044.86, 5279456.30, 1350.46],
 [410094.83, 5279455.22, 1325.97],
@@ -4951,8 +4964,8 @@ rawheights = [[406264.72, 5278037.57, 873.53],
 [410344.70, 5279449.86, 1182.03],
 [410394.67, 5279448.79, 1152.05],
 [410444.64, 5279447.71, 1156.24],
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