Hi Beka, On 05/25/2010 03:58 PM, Bekbolat Zhaidarbayuli wrote: > Does this mean that some of the points are considered to be both first > and last?
I imagine where there is only a single return for a pulse, that single return will be considered as both the first return and the last return. You're probably only eliminating points where there is more than one return for a pulse. As a rule of thumb, you tend to get something like 90% single returns, 9% 2 returns, 0.9% 3 returns, ... Obviously this will vary based on the terrain and the system. Cheers, Mike. -------------------------------------------------------------------------------- Plymouth Marine Laboratory Registered Office: Prospect Place The Hoe Plymouth PL1 3DH Website: www.pml.ac.uk Registered Charity No. 1091222 PML is a company limited by guarantee registered in England & Wales company number 4178503 PML is a member of the Plymouth Marine Sciences Partnership Website: www.pmsp.org.uk -------------------------------------------------------------------------------- This e-mail, its content and any file attachments are confidential. If you have received this e-mail in error please do not copy, disclose it to any third party or use the contents or attachments in any way. Please notify the sender by replying to this e-mail or e-mail [email protected] and then delete the email without making any copies or using it in any other way. The content of this message may contain personal views which are not the views of Plymouth Marine Laboratory unless specifically stated. You are reminded that e-mail communications are not secure and may contain viruses. Plymouth Marine Laboratory accepts no liability for any loss or damage which may be caused by viruses. -------------------------------------------------------------------------------- _______________________________________________ Liblas-devel mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/liblas-devel
