An Oblique View of Terrain Mapping
Ryan Hamilton majored in Environmental Studies at the University of Colorado and has been employed within both the LiDAR and IFSAR mapping worlds since 1998. His interests (that all appear to be tied to mapping) include blue water sailing, backcountry skiing and big mountain and downhill mountain … More »
September 13th, 2013 by Ryan Hamilton
As a medium resolution data set the NEXTMap® 5m terrain data plays an important role between high precision ground survey or LiDAR and lower resolution ‘free’ data. This sweet spot is the realm of preliminary planning or site location analysis when a project needs to be defined but not yet calculated. The use of the NEXTMap data during this initial phase may have higher upfront costs, but in the long run, the more precise a preliminary plan is the less re-work you will experience down the line. Site planning is just one of the many applications that the 5 meter data is suited for, and I will jump into others in following posts.
The reason I bring it up as my first of the ‘primary market’ post is because this use is the one that gets most overlooked because of the temptation to use free data. The NED or SRTM data available from USGS are excellent datasets but the accuracy and relevancy are not as good as NEXTMap. A preliminary plan with old data might look good for your immediate budget but once surveys are conducted multiple times to correct the errors of that ‘free’ preliminary plan, you will probably be well beyond the expense of a NEXTMap purchase.
Category: Oblique view of terrain data