Introduction

This software is designed for encoding image data into Tiled WMS format, known as Meta Raster Format or MRF.  TWMS is based on packing all tiles into a single binary data file with external index and header files.  MRF data encoding is performed using a custom GDAL driver.

Requirements

gdal 1.9.0  (NOTE:  Source code must be retained to build MRF driver.)

Step 1 – Install GDAL

The MRF driver plugin links with the rest of GDAL and it has to be compiled with the same compiler, libraries and same options that GDAL was compiled.  It is a plugin, but that doesn’t mean you compile it once and it works on any system with any GDAL.

Download gdal-1.9.0 source:
wget http://download.osgeo.org/gdal/gdal190.zip

Unpack gdal-1.9.0 source:
mkdir src
mv gdal190.zip src/
cd src/
unzip gdal190.zip

Go to the gdal source directory:
cd gdal-1.9.0/

Configure gdal source install:
set LD_LIBRARY_PATH "<gdal install location>/lib:$LD_LIBRARY_PATH"
./configure --prefix=<gdal install location>
The <gdal install location> should be different from where you build the source code for gdal.

Make gdal:
make

Install gdal:
make install


Step 2 – Install MRF driver

Where,
<tag location>
configuration management

<destination_directory>
location of the MRF driver plugin source code

<gdal source directory>
location of GDAL source code

<gdal install location>
location of GDAL installed software

Check out tagged copy of twms gdal driver:
Eg: svn co https://<tag location> <destination_directory>

Copy the mrf gdal driver to the gdal source tree (this plugin must be compiled here):
cp -R <destination_directory>/GDAL_MRF/*  <gdal source directory>/frmts/

Go to the mrf driver source directory:
cd frmts/mrf

Make the driver:
cp GNUMake Makefile
make plugin

Install the driver:
mkdir –p <gdal install location>/lib/gdalplugins

make iplugin
-OR-
cp gdal_mrf.so.1 <gdal install location>/lib/gdalplugins

Create links:
cd <gdal install location>/lib/gdalplugins
ln -s gdal_mrf.so.1 gdal_mrf.so
ln –s <gdal install location>/lib/gdalplugins <destination_directory>

Step 3 – Testing
Verify that the MRF driver is recognized by GDAL:
gdalinfo --format MRF

List of delivered files
frmt_marfa.html
GNUmakefile
JPEG_band.cpp
makefile.vc
marfa_dataset.cpp
marfa.h
mrf_band.cpp
PNG_band.cpp
Raw_band.cpp
Tif_band.cpp
util.cpp
ZLIB_band.cpp