Orthophotograhy, GIS Basemaps.

Quick Introduction to Orthophotography:
Aerial photographs inherently contain distortions as a result of many factors:

• Camera's orientation at exposure
• Surface relief
• Lens distortions
• Film imperfections

In an orthophotograph (ortho for short), these distortions have been removed.  Orthophotography is most commonly used as a mapping base, especially for Geographic Information Systems (GISs).

Key Benefits:

• More features shown than what are practical to capture on a vector map.
• Easily interpreted.
• Allows direct measurement of distances, areas, and angles.

Experience
Williams has produced orthophotography for numerous engineering firms and more than a quarter of Indiana's counties.  All orthos are produced in-house here at Williams Aerial.  Williams has delivered quality orthos with pixel resolutions ranging from just over an inch to two feet.

Quality
Williams orthos are unsurpassed in image quality.  ALL ortho projects mosaiced, even between flight scales, resulting in truly seamless imagery.  Software written by Williams application development department provides Williams with a true edge in mosaicing (no pun intended) on the competition.

Common applications for orthophotography

• Base for GIS
• Urban planning
• Watershed analysis
• Civil engineering
• Environmental Assessment