81 reputation
6
bio website cirgeo.unipd.it/…
location Padua, Italy
age
visits member for 1 year, 7 months
seen Oct 9 at 13:24

I have / am using C, C++ (Qt), Mapserver, Geoserver, Python, PHP, OpenLayers, OpenScales, Flex, R, GDAL/OGR library and Postresql/PostGIS extensively to develop webgis solutions as well as desktop solutions for access and analysis of geographic data. Currently working quite a lot on datasets from Airborne Laser Scanners' sensors applied to forestry and environmental analysis.


Sep
24
awarded  Autobiographer
Sep
3
comment Most Effective Format to Manage Aerial Photography for Viewing Only
JP2 has similar compressing algorithm as ECW, wavelet compression. See gdal.org/formats_list.html for a comprehensive list of formats as well as description and links to jpg-2000
May
23
awarded  Tumbleweed
May
16
comment Hillshade for 30m NED at continental scale
The only way in flat areas is to mask them and give them a single value depending on the scale you are using. A filter will not work well because there is not enough difference and filter parameters would have to be very strong, oversmoothing the rest. The only way to solve for random effects in flat areas is to just remove them by assigning a single mean value to the flat area. This is of course more of a aesthetic technique than a metric technique!!
May
11
awarded  Supporter
May
11
answered Changing projection in KML from Google Earth to Maps
May
11
answered Why gdalwarp cannot make transparent black nodata?
May
7
answered Hillshade for 30m NED at continental scale
May
6
answered PHP Mapscript get feature / shape by index in layer
May
6
awarded  Student
May
6
asked PHP Mapscript get feature / shape by index in layer
Apr
30
awarded  Teacher
Apr
30
answered GRASS: populating attribute table with specific values
Apr
30
answered How to clean layers from non topological databases?
Apr
30
comment How to repair and clean contours from high data resolution (lidar)?
What do you use to extract contours from LiDAR data? Every how many meters are your contours? If you start from a raster derived from the LiDAR data you could try to run a smoothing filter over the raster and then extract the contours: dangles and islands derive from sudden changes in heights (e.g.. sometimes outliers). PS I know that running a smoothing filter (low-pass) might decrease accuracy of the data, adopt this solution only estimating the LiDAR error vs the smoothing filter parameters. On the other hand if you remove islands and dangles, this also will change the product's (contours)
Apr
30
answered How to repair and clean contours from high data resolution (lidar)?
Apr
27
awarded  Editor
Apr
27
revised Can Geoserver return the raster value of a lat/lon point
added 15 characters in body
Apr
27
answered Can Geoserver return the raster value of a lat/lon point