better formulae

Makefile

@@ -70,7 +70,7 @@ slides: $(SLIDES)
 
 mj-msc.pdf: mj-msc.tex version.inc.tex vars.inc.tex bib.bib \
 	$(LISTINGS) $(addsuffix .pdf,$(FIGURES)) $(addsuffix .pdf,$(RIVERS))
-	latexmk -shell-escape -g -pdf $<
+	latexmk -shell-escape -pdf $<
 
 ############################
 # Report's test dependencies

layer2img.py

@@ -63,7 +63,6 @@ def read_layer(select, width, maybe_quadrant):
 
     conn = psycopg2.connect(PSQL_CREDS)
     sql = "SELECT {way} as way1 FROM {select}".format(way=way, select=select)
-    print(sql)
     return geopandas.read_postgis(sql, con=conn, geom_col='way1')
 
 

mj-msc.tex

@@ -729,21 +729,23 @@ compactness index is calculated as follows:
 
   \item Construct a polygon by joining first and last vertices of the bend.
 
-  \item Calculate area of the polygon.
+  \item Calculate area of the polygon $A_p$.
 
-  \item Calculate perimeter $u$ of the polygon. The same value is the
-      circumference of the circle.
+  \item Calculate perimeter $P$ of the polygon. The same value is the
+      circumference of the circle: $C = P$.
 
-  \item Given circle's perimeter $u$, circle's area $A$ is:
+  \item Given circle's circumference $C$, circle's area $A_c$ is:
 
     \[
-      A = \frac{u^2}{4\pi}
+      A_{c} = \frac{C^2}{4\pi}
     \]
 
-  \item Compactness index is $\nicefrac{P}{A}$:
+  \item Compactness index is $\frac{A_p}{A_c}$:
 
     \[
-      cmp = \frac{P}{A} = \frac{P}{ \frac{u^2}{4\pi} } = \frac{4\pi P}{u^2}
+      cmp = \frac{A_p}{A_c} =
+        \frac{A_p}{ \frac{C^2}{4\pi} } =
+        \frac{4\pi A_p}{C^2}
     \]
 
 \end{enumerate}

wm.sql

@@ -411,8 +411,8 @@ create function isolated_bends(
   dbgname text default null
 ) as $$
 declare
-  -- if neighbor's curvatures are within, it's isolated
-  isolation_threshold constant real default 0.25;
+  -- if neighbor's curvatures are within this fraction of the current bend
+  isolation_threshold constant real default 0.5;
   this real;
   skip_next bool;
   res t_bend_attrs;
@@ -438,6 +438,11 @@ begin
         i,
         res.bend,
         jsonb_build_object(
+          'area', res.area,
+          'cmp', res.cmp,
+          'adjsize', res.adjsize,
+          'baselinelength', res.baselinelength,
+          'curvature', res.curvature,
           'isolated', res.isolated
         )
       );