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).
- More features shown than what are practical to capture on a vector map.
- Easily interpreted.
- Allows direct measurement of distances, areas, and angles.
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.
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
Common applications for orthophotography
- Base for GIS
- Urban planning
- Watershed analysis
- Civil engineering
- Environmental Assessment