Install guide

Using ZGF Backdrops
The SeisWorks navigation, live trace outline and horizon map displays can be enhanced
through the use of ZGF backdrops. This allows the maps to include wells, fields, leases,
bathymetry, coastlines, shipping lanes etc. – whatever is in the specified ZGF picture.
ZGFs are ideal for cultural backdrops, in that they are the OpenWorks standard neutral
backdrop culture format. They are widely used across applications and can be created in
SeisWorks, StratWorks, Z-MAP Plus and WOW.
There is no accepted default location for these files, but they are often stored in the ZGF
subdirectory of one of the OW_PROJ_DATA/<owproj> directories. WOW will therefore
use the first wow_backdrop.zgf file it encounters when searching these directories in
order. If found, the first picture from the file is used.
Note that this file may be a simple link, e.g.
prompt> cd <OW_PROJ_DATA>/<OpenWorks Project>/ZGF
prompt> ln –s <actual ZGF name> wow_backdrop.zgf
Note also that the batch generation of seismic live trace outlines, using script
seisLTO3DAll as described in the previous section, uses the same logic.
Converting ZGF Pictures to Shapefiles/Images in Batch
Utility zgf2shp provides the same functionality as in the WOW browser for converting a
ZGF picture file to a shapefile. Utility zgfImage provides the same functionality as in the
WOW browser for converting a ZGF picture file to a geo-referenced image, i.e. a .jpg file
plus .jpgw world file.
Additional utilities zgfpiclist and zgfpicinfo are provided to obtain the arguments
required for zgf2shp. The workflow is illustrated below:
prompt> zgfpiclist
Usage: zgfpiclist zgf
prompt> zgfpiclist contract_28.ZGF
3d outlines
overlay_for_finder
prompt> zgfpicinfo
Usage: zgfpicinfo zgf picture
prompt> zgfpicinfo contract_28.ZGF "{3d outlines}"
{1 Borders} {6 Text} {16 Fault trace} {30 Colorfilled polygons}
{36 Lease borders and labels}
prompt> zgf2shp
Usage: zgf2shp zgf picture stem lgbs ?dir?
prompt> zgf2shp contract_28.ZGF "{3d outlines}" outline3d 16,36 /tmp
/tmp/outline3d_faults_arc.shp /tmp/outline3d_lgb36_arc.shp
WOW 5000.0.1.11 Release Notes Page 64 of 104 March 2014