Documented some minor new options

NEWS

@@ -12,6 +12,9 @@
      automatically computed correlation search range.
    * Added --corr-memory-limit-mb option to limit the
      memory usage of the SGM/MGM algorithms.
+   * Improved search range estimation in nadir epipolar 
+     alignment cases. Added --elevation-limit option to
+     help constrain this search range.
 
  - bundle_adjust
    * The tool is a lot more sensitive now to --camera-weight,
@@ -32,6 +35,8 @@
      these coefficients are stored in _RPC.TXT files.
    * Support for web-based PROJ.4 strings, e.g., 
      point2dem --t_srs http://spatialreference.org/ref/iau2000/49900/
+   * Added --max-output-size option to point2dem to prevent against
+     creation of too large DEMs.
 
 *** RELEASE 2.6.0, May 15, 2017 ***
 

docs/book/stereodefault.tex

@@ -285,6 +285,11 @@ \section{Correlation}
   when using pinhole frame cameras with epipolar alignment the actual vertical
   search range may be much smaller than the automatically computed search range.
 
+\item[elevation-limit \textnormal{\small{(\emph{float float})}}] \hfill \\
+  Notify ASP that all elevations are expected to fall in this range relative to
+  the datum. Currently only used to restrict the search range estimate in 
+  nadir epipolar alignment cases.
+
 \item[xcorr-threshold \textnormal{\small{(\emph{integer})}} (default = 2)] \hfill \\
 
   Integer correlation to a limited sense performs a correlation

docs/book/tools.tex

@@ -857,6 +857,7 @@ \subsection{Using with LAS or CSV Clouds}
 \texttt{-\/-orthoimage-hole-fill-len \textit{int(=0)}} & Maximum dimensions of a hole in the output orthoimage to fill in, in pixels. \\ \hline
 \texttt{-\/-remove-outliers-params  \textit{pct (float) factor (float) [default: 75.0 3.0]}} & Outlier removal based on percentage. Points with triangulation error larger than pct-th percentile times factor will be removed as outliers. \\ \hline
 \texttt{-\/-max-valid-triangulation-error \textit{float(=0)}} & Outlier removal based on threshold. Points with triangulation error larger than this (in meters) will be removed from the cloud. \\ \hline
+\texttt{-\/-max-output-size \textit{columns rows} } & Creating of the DEM will be aborted if it is calculated to exceed this size in pixels. \\ \hline
 \texttt{-\/-median-filter-params \textit{window\_size (int) threshold (double)}} & If the point cloud height at the current point differs by more than the given threshold from the median of heights in the window of given size centered at the point, remove it as an outlier. Use for example 11 and 40.0.\\ \hline
 \texttt{-\/-erode-length \textit{length (int)}} & Erode input point clouds by this many pixels at boundary (after outliers are removed, but before filling in holes). \\ \hline
 \texttt{-\/-use-surface-sampling \textit{[default: false]}} & Use the older algorithm, interpret the point cloud as a surface made up of triangles and sample it (prone to aliasing).\\ \hline