Update generate test data script

docs/DESIGN.adoc

@@ -759,7 +759,7 @@ All of these cases are generated with this code:
 
 [source,python]
 ----
-include::./generate-test-data.py[]
+include::../test-data/00-generate-test-data.py[]
 ----
 
 == Interfaces [[interfaces]]

test-data/00-generate-test-data.py

@@ -1,27 +1,30 @@
+#!/usr/bin/env python3
 from random import random
-with open("00-sample-latlon.csv", "w") as f:
+with open("./00-sample-latlon.csv", "w") as f:
     f.write("lat,lon\n")
 
-    # Edge cases
-    # Do both positive and negative
-    for neg in ("-", ""):
-        # Add a little bit of variation
-        for dec in ("0", "00000001", "5", "05", "9999"):
-            # Possibly strange latitudes
-            for lat_i in (0, 1, 90):
-                # Possibly strong longitudes
-                for lon_i in (0, 1, 90, 180):
-                    f.write(f"{neg}{lat_i}.{dec},")
-                    f.write(f"{neg}{lon_i}.{dec}\n")
-
     # Normalized
     for i in range(10000):
         lat = (random() - .5) * 2 * 90
         lon = (random() - .5) * 2 * 180
         f.write(f"{lat},{lon}\n")
 
-    # Non-normalized
-    for i in range(10000):
-        lat = (random() - .5) * 2 * 1000
-        lon = (random() - .5) * 2 * 1000
-        f.write(f"{lat},{lon}\n")
+    # Edge cases
+    # Do both positive and negative
+    for neg in (1, -1):
+        # Add a little bit of variation
+        for dec in (0, .1, .5, .05, .9999):
+            # Possibly strange latitudes
+            for lat_i in (0, 1, 90):
+                # Possibly strong longitudes
+                for lon_i in (0, 1, 90, 180):
+                    lat = neg * (lat_i - dec)
+                    lon = neg * (lon_i - dec)
+
+                    f.write(f"{lat:f},{lon:f}\n")
+
+    # # Non-normalized
+    # for i in range(10000):
+    #     lat = (random() - .5) * 2 * 1000
+    #     lon = (random() - .5) * 2 * 1000
+    #     f.write(f"{lat},{lon}\n")