The original photographs were
vertical 9”x9” metric quality color transparencies shot with Kodak 2448 film. The
photographs were scanned on a UMAX Mirage II, 12”x17”, flatbed scanner. Digital
files TIFF files with a resolution of 600 dpi were created using Magic Scan
image scanning software version 3.0.
The scanned images ranged in size from 85-90 MB and were in a 24-bit format. TIFF file dimensions were on average 5372 by
5568 pixels. Once the photos were
scanned, TIFF files were converted to JFIF version 1.1 JPEG images and their
resolution was reduced to 20% of the original resolution (5:1 compression) using
PolyView version 3.40b4. The new
reduced resolution photographs were again formatted in PolyView and converted
to thumbnails, which were resized to a width of 100 pixels. The original scanned photographs were then
backed up using Seagate’s Backup Exec version 2.0m on Travan 20 GB tapes.
Image maps were created which
allowed the reduced resolution JPEG images to be incorporated into a web page
and on CDs for distribution to the Maine and NH spill response community. To do this, flightlines were screen
digitized in ArcView GIS 3.2 working from paper copies of each photo project
index. Flightlines were coded using
project numbers and original line designations. Once lines were digitized, nodes were created at intervals equal
to the distance between photo-centers using the EditTools Ver. 1.0 ArcView extension
by Ianko Tchoukanski. Points were generated from nodes using the
Xtools ArcView extension by Mike
DeLaune. Points were coded for project number,
flightline and photo number.
The ImageMapper 3.0 extension was
used to create HTML image maps from ArcView project views. The coast was divided up into 7 regions and
an image map was created for each of these regions, using the photo-centers as
links to the actual photographs. This
number of regions was chosen to allow mastering of the project on CDs.
