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| Milestones
| | November, 2006 | Tiffs
1.0 was finished. | | March 18, 2007 | Tiffs
1.1 was finished, which has the ability of importing .las file
directly. | | April 11, 2007 | Tiffs
1.2 was released. | | January 28, 2008 | Tiffs 2.0
was
released. The highlights include: it can work over both urban and
forested areas; it can output data in .las format; it is easier to set
parameters for filtering; it is faster for filtering; there is a major
update in the way of generating surface models and height models. | | May 13, 2008 | Tiffs 2.5
was released. There are major updates
in the filtering algorithm so that lidar data with sparse spot density
can be efficiently processed. Tiffs can export grids in TIF (Tagged
Image File) format now. The interface has been improved too. | | August 8, 2008 | Tiffs
3.0 was released. Functions on grid-based statistical analysis
(GSA) of canopy height have been added. | | February 14, 2009 | Tiffs
4.0 was released. There is a major update in the filtering
algorithm.
Now,
filtering becomes almost completely automatic and much faster. At most
of the
time, users do not really need to tune the parameter now. The filtering
speed increases up to 30-40% compared to the previous version. The
filtering algorithm can remove outliers more effectively too. Some
capability on the ground-based lidar processing is added. The mosaic
submodel is updated to stitch different tiles more smoothly. | | June 24, 2009 | Tiffs
4.5
was released. This version has added 1) functions of processing
ground-based lidar data, 2) tools to generate batch-processing scripts
for importing TIffs outputs to ArcGIS. The filtering algorithm has been
updated to perform better over open bumpy terrain. | | September 30, 2009 | Tiffs
5.0
was released. Tiffs
5.0 has everything you could expect for a filtering algorithm:
accurate, automatic, and fast. It is like the ultimate solution for
filtering after being tested for tons of data from all over the world.
Tiffs 4.0 made Tiffs unbeatable in speed and automation. But Tiffs 5.0
pushes the boundary ever further to the extreme, especially in
improving the filtering accuracy over steep mountain ridges. | | May 15, 2010 | Tiffs 6.0
was released. The speed of filtering has been significantly increased
for datasets of high point density. The accuracy of filtering over dense
canopy (such as those in the tropics) has been improved. Canopy
geometric volume of individual trees can now be extracted in the canopy
module. Both 32-bit and 64-bit versions are available. | January 2, 2011
| Tiffs 7.0
was released with a number of significant improvements. 1) Tiffs 7.0 now can generate individual tree polygons (instead of crown circles in previous versions), making it possible to integrate with other remote sensing data to perform classification at the object-level, 2) many additional statistics (such as standard deviation, skewness, percentiles, etc) can be generated based on the point cloud vertical distribution within each individual objects, which is useful for classifying objects and retrieving their parameters (such as biomass), 3) all attributes of las points will be kept, 4) Tiffs 7.0 is able to generate DEM based on the class field in the LAS files. Many users have received lidar data that have already been classified into ground and non-ground returns. Tiffs gives you the option to use classified ground returns to generate DEM. What is more, Tiffs is able to improve the classified ground returns by removing outliers, and 5) The speed of saving data into LAS binary files has been increased by > 5 times.
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