x/y distances between explicit data and survey points

core/models/caves.py

@@ -158,9 +158,11 @@ class Cave(TroggleModel):
         for e in CaveAndEntrance.objects.filter(cave=self):
             if e.entrance.best_station() and e.entrance.best_station() != "":
                 #print(self, e, e.entrance.best_station())
-                if e.entrance.best_station_object().x:
+                try:
-                    # print(f"{self} {e.entrance.best_station_object()} {e.entrance.best_station_object().x}") 
+                    x = e.entrance.best_station_object().x
                     no_data = False
+                except:
+                    pass
         return no_data
 
     def singleentrance(self):

core/models/survex.py

@@ -58,6 +58,7 @@ class SurvexStation(models.Model):
     x = models.FloatField(blank=True, null=True)
     y = models.FloatField(blank=True, null=True)
     z = models.FloatField(blank=True, null=True)
+    entrance = models.ForeignKey("Entrance", blank=True, null=True, on_delete=models.SET_NULL)
 
     class Meta:
         ordering = ("id",)

core/views/statistics.py

@@ -1,4 +1,5 @@
 from collections import OrderedDict
+from math import sqrt
 from pathlib import Path
 
 from django.shortcuts import render
@@ -276,15 +277,10 @@ def dataissues(request):
 
 def eastings(request):
     """report each Northing/Easting pair wherever recorded"""
-    ents = []
+    ents = set()
-    entrances = Entrance.objects.all()
+    gpsents = set()
-    for e in entrances:
+    
-        if e.easting or e.northing:
+    def add_stations(e):
-            ents.append(e)
-        if e.lat_wgs84 or e.long_wgs84:
-            ents.append(e)
-
-    for e in ents:
         try:
             ts = e.tag_station
             if ts:
@@ -306,10 +302,39 @@ def eastings(request):
             e.tag_es = None
             e.tag_os = None
             # print(f"exception for {e}")
-        
+                
-    stations = SurvexStation.objects.all()
+    entrances = Entrance.objects.all()
+    for e in entrances:
+        if e.easting or e.northing:
+            ents.add(e)
+            add_stations(e)
+            e.northing = float(e.northing)
+            e.easting = float(e.easting)
+            
+            if e.northing < 5200000:
+                e.bmn = True
+                # e.northing = e.northing + 5200000
+                e.northing = e.northing + 5198919.918
+                
+                #e.easting = e.easting  - 36000 + 486000
+                e.easting = e.easting + 374854.63 # linear hack
+            
+            try:
+                e.diffx = e.easting - e.best_station_object().x
+                e.diffy = e.northing - e.best_station_object().y
+                e.error = sqrt(e.diffx**2 + e.diffy**2)
+            except:
+                pass
+            
+    for e in entrances:
+        if e.lat_wgs84 or e.long_wgs84:
+            gpsents.add(e)        
+            add_stations(e)
+            
+            
+    stations = SurvexStation.objects.all() # NB these are NOT all the stations in troggle_import_root.pos
 
-    return render(request, "eastings.html", {"ents": ents, "stations": stations})
+    return render(request, "eastings.html", {"ents": ents, "gpsents": gpsents, "stations": stations})
 
 
 def aliases(request, year):

parsers/locations.py

@@ -34,7 +34,7 @@ class MapLocations(object):
     We don't need these map locations any more ?!
     They would only be used in addition to entrances going onto a map display"""
 
-    p = [
+    fp = [
         ("laser.0_7", "BNase", "Reference", "Bräuning Nase laser point"),
         ("226-96", "BZkn", "Reference", "Bräuning Zinken trig point"),
         ("vd1", "VD1", "Reference", "VD1 survey point"),
@@ -48,13 +48,15 @@ class MapLocations(object):
         ("laser.0_5", "LSR5", "Reference", "Laser Point 0/5"),
         ("225-96", "BAlm", "Reference", "Bräuning Alm trig point"),
     ] # 12 fixed points
+    
+    p = []
 
     def points(self):
         prior = len(self.p)
         for ent in Entrance.objects.all():
             for st, ent_type in {ent.exact_station: "exact", ent.other_station: "other", ent.tag_station: "tag"}.items():
                 if st != "":
-                    self.p.append((st, str(ent), ent.needs_surface_work(), str(ent)))
+                    self.p.append((st, str(ent), ent.needs_surface_work(), ent))
         store_data_issues()
         found = len(self.p) - prior
         message = f" -  {found} Entrance tags found - not yet validated against survex .pos file."
@@ -70,9 +72,10 @@ def validate_entrance_stations(ent=None):
     """
     bads = 0
     good = 0
+    url="/caves" # fallback
     
     def tag_lower_case(station):
-        
+        nonlocal url
         so = SurvexStation.objects.filter(name=station.lower())
         if so.count() == 1:
            message = f"X - Entrance {ent}  station '{station}' should be '{station.lower()}'"
@@ -104,29 +107,31 @@ def validate_entrance_stations(ent=None):
                 continue
             try:
                 so = SurvexStation.objects.filter(name=st)
-                if so.count() == 1:
-                    good +=1
-                    # print(f"OK - Entrance {ent}  '{ent_type}' station '{st}'")
-                    continue
-                if so.count() != 0:
-                    message =f"{so.count()} found for  Entrance {ent}  '{ent_type}' station '{st}' {so}"
-                else:
-                    message = f" ! - Entrance {ent} has invalid '{ent_type}' station '{st}'"
-                if st == ent.best_station():
-                    message = message + " - AND THIS IS THE 'BEST' ONE"
-                else:
-                    message = message + " - not the 'best'"
-                stash_data_issue(parser="positions", message=message, url=url)
-                print(message)
-                bads +=1
-                tag_lower_case(st)
-                continue
             except:
                 message = f" ! - Entrance {ent} has invalid '{ent_type}' station '{st}'. EXCEPTION."
                 stash_data_issue(parser="positions", message=message, url=url)
                 print(message)
                 bads +=1
                 continue
+                
+            if so.count() == 1:
+                good +=1
+                # print(f"OK - Entrance {ent}  '{ent_type}' station '{st}'")
+                continue
+            if so.count() != 0:
+                message =f"{so.count()} found for  Entrance {ent}  '{ent_type}' station '{st}' {so}"
+            else:
+                message = f" ! - Entrance {ent} has invalid '{ent_type}' station '{st}'"
+            if st == ent.best_station():
+                message = message + " - AND THIS IS THE 'BEST' ONE"
+            else:
+                message = message + " - not the 'best'"
+            stash_data_issue(parser="positions", message=message, url=url)
+            print(message)
+            bads +=1
+            tag_lower_case(st)
+            continue
+ 
                     
     if ent:
         return validate_ent(ent)
@@ -255,8 +260,10 @@ def LoadPositions():
 
     mappoints = {}
     for pt in MapLocations().points():
-        svxid, number, point_type, label = pt
+        svxid, number, point_type, ent = pt
-        mappoints[svxid] = True
+        #((st, str(ent), ent.needs_surface_work(), ent))
+
+        mappoints[svxid] = ent
         if svxid =="1":
             print(f"BOGUS {pt}") # this is now checked for when importing the entrance tags in parsers/caves.py
 
@@ -294,6 +301,7 @@ def LoadPositions():
                         ss.x = float(x)
                         ss.y = float(y)
                         ss.z = float(z)
+                        ss.entrance = mappoints[sid]
                         ss.save()
                         found += 1
                     except:

templates/cave.html

@@ -175,7 +175,7 @@
             <dt>Explorers</dt><dd>{{ ent.entrance.explorers|safe }}</dd>
         {% endif %}
         {% if ent.entrance.northing %}
-            <dt>Location</dt><dd>UTM33 Northing: {{ ent.entrance.northing|safe }}, Easting: {{ ent.entrance.easting|safe }}, {{ ent.entrance.alt|safe }}m</dd>
+            <dt>Location</dt><dd> Northing: {{ ent.entrance.northing|safe }}, Easting: {{ ent.entrance.easting|safe }} (UTM or BMN, depending...), {{ ent.entrance.alt|safe }}m</dd>
         {% endif %}
         {% if ent.entrance.lat_wgs84 %}
             <dt>Location</dt><dd><a href="https://www.openstreetmap.org/?mlat={{ ent.entrance.lat_wgs84|floatformat:7}}&mlon={{ent.entrance.long_wgs84|floatformat:7}}">WGS84 Lat.: {{ ent.entrance.lat_wgs84|floatformat:7 }} N, Long.:{{ ent.entrance.long_wgs84|floatformat:7 }} E</a></dd>

templates/eastings.html

@@ -27,15 +27,25 @@ Coordinate systems in Austria are explained in:<br>
 <p>The Lat. Long. coordinates are manually entered using a phone or a hand-held GPS device at (or near) the entrance.
 <p>For the Cave column, if there is an official cave name, then it is shown. 
 Otherwise whatever other name we can find for it is shown <em>in italics</em>.
-For the Entrance column, if the entrance has a name (e.g. Gr&uuml;ner Eingang in Schwarzmooskogeleish&ouml;hle) then it is shown.
+
- Otherwise it says "Anon:" followed by whatever other name we can find for it, usually the entrance id slug,  <em>in italics</em>.
 <style> 
 th, td {
   padding-left: 5px;
   padding-right: 5px;
 </style>
-<table>
+
-<tr><th>Cave</th><th>Entrance</th><th>best Easting</th><th>best Northing</th><th>GPS Lat</th><th>GPS Long</th><th>tag</th><th>tag exact</th><th>tag other</th><th>slug</th></tr>
+<p>OK now for the nasty bit. Many of the older caves did not have easting & northing in UTM 33T at all, but (probably) in BMN and converting between BMN into UTM requires ellipsoids and bessel functions.. or we can just take a linear approximation, which is what I have done here:<br>
+e.northingUTM = e.northingBMN + 5198919.918<br>
+e.eastingUTM = e.easting + 374854.63<br>
+Such converted eastings and northings are <em>in italics</em> in the table below. As you can see, some were wildly out.
+<p>These magic numbers simply come from assuming that both BMN and UTM are in metres, and linear over our area, and then taking the avergage of the offsets for 5 locations, the 5 cave entrances at the bottom of this page: 
+<a href="http://localhost:8000/handbook/survey/coord.htm#summary">Olaf's Coordinates</a>.
+<p>This horrible approximation is accruate to ~8m in the northing and ~30m in the easting.
+<table>BMN
+<tr><th>Cave</th><th>Entrance slug</th><th>Easting</th><th>Northing</th><th>best tag easting</th><th>best tag northing</th>
+<th>&Delta; x</th>
+<th>&Delta; y</th>
+<th>Distance (m)</th></tr>
 {% for ent in ents %}
 <tr>
   <td style="text-align:left">
@@ -47,28 +57,24 @@ th, td {
         <em>{{c|safe}}</em>
     {% endif %}</a><br>
   {% endfor %}</td>
-  <td style="text-align:left">
-    {% if ent.name %}
-        {{ent.name|safe}}
-    {% else %}
-        Anon: <em>{{ent|safe}}</em>
-    {% endif %}
-  </td>
-  <td style="text-align:right">{{ent.easting|floatformat:2}}</td>
-  <td style="text-align:right">{{ent.northing|floatformat:2}}</td>
-  <td style="text-align:right">{{ent.lat_wgs84|floatformat:6}}</td>
-  <td style="text-align:right">{{ent.long_wgs84|floatformat:6}}</td>
-  <td style="text-align:right">{{ent.tag_station}}</td>
-  <td style="text-align:right">{{ent.exact_station}}</td>
-  <td style="text-align:right">{{ent.other_station}}</td>
   <td style="text-align:right">{{ent.slug}}</td>
+  
+  <td style="text-align:right; {% if ent.bmn %}font-style: italic{% endif %}">{{ent.easting|floatformat:2}}</td>
+  <td style="text-align:right; {% if ent.bmn %}font-style: italic{% endif %}">{{ent.northing|floatformat:2}}</td>
+
+  <td style="text-align:right">{{ent.best_station_object.x|floatformat:2}}</td>
+  <td style="text-align:right">{{ent.best_station_object.y|floatformat:2}}</td>
+  <td style="text-align:right; {% if ent.bmn %}font-style: italic{% endif %}">{{ent.diffx|floatformat:0}}</td>
+  <td style="text-align:right; {% if ent.bmn %}font-style: italic{% endif %}">{{ent.diffy|floatformat:0}}</td>
+  <td style="text-align:right; {% if ent.bmn %}font-style: italic{% endif %}">{{ent.error|floatformat:0}}</td>
 </tr>
 {% endfor %}
 </table>
-<p>and now with the locations of the survey stations. All as UTM eatings, norhtings:
+
+<p>and now the GPS equivalents:
 <table>
-<tr><th>Cave</th><th>best Lat</th><th>best Long</th><th>tag</th><th>tag Lat</th><th>tag Long</th><th>tag exact</th><th>exact Lat</th><th>exact Long</th><th>tag other</th><th>other Lat</th><th>other Long</th></tr>
+<tr><th>Cave</th><th>GPS Lat</th><th>GPS Long</th><th>best Lat</th><th>best Long</th><th>tag</th><th>tag Lat</th><th>tag Long</th><th>tag exact</th><th>exact Lat</th><th>exact Long</th><th>tag other</th><th>other Lat</th><th>other Long</th></tr>
-{% for ent in ents %}
+{% for ent in gpsents %}
 <tr>
   <td style="text-align:left">
   {% for c in ent.cavelist %}
@@ -80,6 +86,8 @@ th, td {
     {% endif %}</a><br>
   {% endfor %}</td>
  
+  <td style="text-align:right">{{ent.lat_wgs84|floatformat:6}}</td>
+  <td style="text-align:right">{{ent.long_wgs84|floatformat:6}}</td>
   <td style="text-align:right">{{ent.lat|floatformat:6}}</td>
   <td style="text-align:right">{{ent.long|floatformat:6}}</td>
   <td style="text-align:right">{{ent.tag_station}}</td>
@@ -104,8 +112,9 @@ the assemblage of survex files, including fixed point files, and is probably 'co
 <a href="/handbook/survey/coord2.html">GPS and coordinate systems</a><br>
 <a href="/handbook/survey/coord.htm">Basic Coordinate Systems</a>.
 
+<p>This next table is of all the survex stations in troggle: i.e. only those survey stations which have been identified with an Entrance by manually editing the Entrance data.
 <table cellpadding="6" cellspacing="8">
-<tr><th>Survex Station</th><th>x</th><th>y</th><th>lat.</th><th>long.</th></tr>
+<tr><th>Survex Station</th><th>x</th><th>y</th><th>lat.</th><th>long.</th><th>Used on ent</th></tr>
 {% for s in stations %}
 <tr>
   <td style="text-align:left; width:240px"> {{s.name|safe}} </td>
@@ -113,7 +122,7 @@ the assemblage of survex files, including fixed point files, and is probably 'co
   <td style="text-align:right; width:90px"> {{s.y|floatformat:2}} </td>
   <td style="text-align:right; width:90px"> {{s.lat|floatformat:6}} </td>
   <td style="text-align:right; width:90px"> {{s.long|floatformat:6}} </td>
-  
+  <td style="text-align:right;" > {{s.entrance|safe}} </td>
 </tr>
 {% empty %}
   <td colspan="3"> NO STATION DATA - This is due to survex (cavern) failing on the entire dataset.