[GRASS-SVN] r70717 - grass-promo/grassposter/2017_NCGIS_How_innovations_thrive

[svn_grass at osgeo.org]

Author: wenzeslaus
Date: 2017-03-01 07:28:05 -0800 (Wed, 01 Mar 2017)
New Revision: 70717

Modified:
   grass-promo/grassposter/2017_NCGIS_How_innovations_thrive/README.txt
Log:
instructions to rasterize the poster

Modified: grass-promo/grassposter/2017_NCGIS_How_innovations_thrive/README.txt
===================================================================
--- grass-promo/grassposter/2017_NCGIS_How_innovations_thrive/README.txt	2017-03-01 15:07:57 UTC (rev 70716)
+++ grass-promo/grassposter/2017_NCGIS_How_innovations_thrive/README.txt	2017-03-01 15:28:05 UTC (rev 70717)
@@ -1,3 +1,7 @@
+# Poster instructions
+
+## Dependencies
+
 This poster requires pdflatex been installed.
 In addition, some styles are needed.
 
@@ -2,5 +6,31 @@
 Fedora:
-  dnf install texlive texlive-a0poster texlive-wrapfig texlive-standalone  texlive-tikzposter texlive-xstring
 
+    dnf install texlive texlive-a0poster texlive-wrapfig \
+        texlive-standalone texlive-tikzposter texlive-xstring
+
 Debian/Ubuntu:
-  sudo apt-get install texlive-latex-extra texlive-pictures pgf
+
+    sudo apt-get install texlive-latex-extra texlive-pictures pgf
+
+## Rasterization
+
+To create a rasterized version (some plotters have trouble with the PDF)
+use
+
+    make rasterize
+
+You can use this file to create a small PNG of the poster. It is best
+rescaled in Gimp using Sinc (Lanczos3) method.
+
+To create a minimum size image which will be still readable (although
+not necessarily nice) use:
+
+    # renders fonts with low quality
+    gs -sDEVICE=png16m -dDownScaleFactor=2 -r50 \
+        -o poster.png poster.pdf
+    # optimizes compression
+    optipng -o9 poster.png
+    # simplify colors (destroys some colors, esp. gradients)
+    pngnq -n 128 -s 3 poster.png
+    # overwrite the original file
+    mv poster-nq8.png poster.png