Hi Vince:
Although the 2 excellent linked tutorials (by Luis Feliz-Tirado) on the wiki page linked above discuss "FSX", the GUI and principal of operations is basically similar in the FS9 Annotator SDK.
One must know the file name(s) of the custom land class texture tile(s) which one wishes to annotate, so one is able to open and work with the proper terrain tile bitmap as a background in the annotator utility of choice.
FS9 terrain tile IDs and associated custom land class (photoreal) texture / AGN file names can be derived by use of
TCalc version 2.0 - by Richard Ludowise (aka "rhumbaflappy"):
http://library.avsim.net/esearch.php?CatID=fs2004sd&DLID=55467
(The required module "
FDSConnection.dll" is included).
If your photoreal coverage area is small, you may wish to annotate manually as the above tutorial illustrates, which allows great precision.
If your area to be covered is large, you may wish to initially "saturate" the tiles with autogen using a semi-automated utility, and then go back to edit locations you will see from very low altitudes and/or on the ground for the desired degree of precision.
FYI: Some utilities for semi-automated autogen placement (in order of apparent general preference by others in the FS Development community) are:
1.)
AgenT - by Lars Hoyer (part of the UK-VFR Objects Library package; IIRC, 'AgenTs'
does place other objects in addition to Trees):
...See links in this post:
http://www.fsdeveloper.com/forum/showpost.php?p=145566&postcount=2
...OR:
AgenT (core utility package
ONLY with
no manual... IMHO one
needs the manual !):
http://translate.google.com/translate?hl=en&sl=fr&u=http://www.f-bmpl.com/index.php?option=com_weblinks&catid=25&Itemid=22&ei=jpPaTZKZEYfdgQeX-uRX&sa=X&oi=translate&ct=result&resnum=1&sqi=2&ved=0CB8Q7gEwAA&prev=/search?q=http://www.f-bmpl.com/index.php%3Foption%3Dcom_weblinks%26catid%3D25%26Itemid%3D22&hl=en&prmd=ivns
More Links on AgenT cited at FSDEV forums:
https://www.fsdeveloper.com/forum/search/1872906/?q=AgenT&c[users]=GaryGB&o=date
2.)
AutoTrees - by David J. Griffiths (IIRC, 'AutoTrees' does not place objects other than Trees)
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=AutoTreesBeta01.zip
NOTE: Both the 2 above utilities do work in FS9 (which some FSX developers also prefer initially during creation and editing, prior to eventual conversion for use in FSX).
PS: Some caveats regarding autogen annotation manually (
ex: be sure to cover the overall imagery area randomly and/or evenly
from the start, so one will not end up with parts of one's LOD-13 quad / cell photoreal texture tile areas devoid of autogen because the FS9 autogen rendering limit is reached before the end of annotation placement sequences in one's AGN file for that tile number is reached):
http://www.fsdeveloper.com/forum/showthread.php?t=20381&highlight=autogen
Hope this helps you get started !
GaryGB