final section has been written

This commit is contained in:
Motiejus Jakštys 2021-05-19 22:57:51 +03:00 committed by Motiejus Jakštys
parent fad421b43e
commit e61e75e3ac
2 changed files with 51 additions and 9 deletions

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@ -33,20 +33,23 @@ FIGURES = \
RIVERS = \
salvis-25k \
salvis-50k \
salvis-250k \
salvis-250k-10x \
salvis-gdr250-2x \
salvis-douglas-64-50k \
salvis-visvalingam-64-50k \
salvis-douglas-64-chaikin-50k \
salvis-visvalingam-64-chaikin-50k \
salvis-overlaid-douglas-64-chaikin-50k \
salvis-overlaid-visvalingam-64-chaikin-50k \
salvis-wm-250k \
salvis-wm-250k-10x \
salvis-wm-250k-2x \
salvis-wm-50k \
salvis-wm-50k-nw \
salvis-wm-50k-ne \
salvis-wm-overlaid-250k-zoom \
salvis-wm-gdr50 \
salvis-wm-gdr50-ne
salvis-wm-gdr50-ne \
salvis-wm-220
#################################
# The thesis, publishable version
@ -174,8 +177,11 @@ salvis-25k_WIDTHDIV = 1
salvis-50k_1SELECT = wm_visuals where name='salvis'
salvis-50k_WIDTHDIV = 2
salvis-250k_1SELECT = wm_visuals where name='salvis'
salvis-250k_WIDTHDIV = 10
salvis-250k-10x_1SELECT = wm_visuals where name='salvis'
salvis-250k-10x_WIDTHDIV = 10
salvis-gdr250-2x_1SELECT = wm_visuals where name='salvis-gdr250'
salvis-gdr250-2x_WIDTHDIV = 2
salvis-douglas-64-50k_1SELECT = wm_visuals where name='salvis-douglas-64'
salvis-douglas-64-50k_WIDTHDIV = 2
@ -201,8 +207,11 @@ salvis-overlaid-visvalingam-64-chaikin-50k_1COLOR = orange
salvis-overlaid-visvalingam-64-chaikin-50k_WIDTHDIV = 2
salvis-overlaid-visvalingam-64-chaikin-50k_QUADRANT = 1
salvis-wm-250k_1SELECT = wm_visuals where name='salvis-wm-220'
salvis-wm-250k_WIDTHDIV = 10
salvis-wm-250k-2x_1SELECT = wm_visuals where name='salvis-wm-220'
salvis-wm-250k-2x_WIDTHDIV = 2
salvis-wm-250k-10x_1SELECT = wm_visuals where name='salvis-wm-220'
salvis-wm-250k-10x_WIDTHDIV = 10
salvis-wm-50k_1SELECT = wm_visuals where name='salvis-wm-75'
salvis-wm-50k_2SELECT = wm_visuals where name='salvis'
@ -235,6 +244,8 @@ salvis-wm-gdr50-ne_1COLOR = orange
salvis-wm-gdr50-ne_2COLOR = green
salvis-wm-gdr50-ne_QUADRANT = 1
salvis-wm-220_1SELECT = wm_visuals where name='salvis-wm-220'
salvis-wm-220_WIDTHDIV = 2
.faux_db_pre: db init.sql
bash db start

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@ -254,7 +254,7 @@ simplification.
\hfill
\begin{subfigure}[b]{.49\textwidth}
\centering
\includegraphics[width=.2\textwidth]{salvis-250k}
\includegraphics[width=.2\textwidth]{salvis-250k-10x}
\caption{Example scaled 1:\numprint{250000}.}
\end{subfigure}
\caption{Down-scaled original river.}
@ -1416,6 +1416,7 @@ To sum up, mid-scale simplification works well for some geometries, but creates
sharp edges for others.
\subsubsection{Large-scale (1:\numprint{250000})}
\label{sec:analyzed-large-scale}
As visible in figure~\ref{fig:salvis-wm-250k}, for large-scale map, some of the
resulting bends look significantly exaggerated. Why is that?
@ -1426,7 +1427,7 @@ simplification and overlays the original.
\centering
\begin{subfigure}[b]{.49\textwidth}
\centering
\includegraphics[width=.2\textwidth]{salvis-250k}
\includegraphics[width=.2\textwidth]{salvis-250k-10x}
\caption{Original.}
\end{subfigure}
\hfill
@ -1521,6 +1522,32 @@ illustrates two small bends that have been removed in GDR50LT, but have been
exaggerated by our implementation.
\subsubsection{Large-scale (1:\numprint{250000})}
\label{sec:national-large-scale}
Figure~\ref{fig:salvis-wm-250k} illustrates the original GDR250LT and the
{\WM}--simplified version. As section~\ref{sec:analyzed-large-scale} explains,
the algorithm tries to exaggerate many bends to a great size. However, GDR250LT
takes the opposite approach --- only the very basic shapes of the largest bends
are retained. Time and customers will tell, which approach is more appropriate,
after the current {\WM} implementation receives some time and attention, as
desired in section~\ref{sec:future-suggestions}.
\begin{figure}[h!]
\centering
\begin{subfigure}[b]{.49\textwidth}
\includegraphics[width=\textwidth]{salvis-gdr250-2x}
\caption{GDR250LT.}
\end{subfigure}
\hfill
\begin{subfigure}[b]{.49\textwidth}
\centering
\includegraphics[width=\textwidth]{salvis-wm-220}
\caption{{\WM}-simplified GDB10LT.}
\end{subfigure}
\caption{GDR250LT and {\WM}--simplified GDB10LT.}
\label{fig:salvis-wm-250k}
\end{figure}
\subsection{Testing Results Online}
\label{sec:testing-results-online}
@ -1578,6 +1605,10 @@ implementation:
Section~\ref{sec:generalization-results-of-analyzed-rivers} contains
a exaggerated bends that became sharp and includes some future ideas.
\item What are the exaggeration limits when working with large scales?
Section~\ref{sec:national-large-scales} discusses examples that some
limits are necessary.
\item Research when bends should be marked as \textsc{isolated}. As is
seen from examples, the current criteria is not robust enough.