[Roughness with many windbreaks]

Dear Niels,
Thank for your response. It's very useful with me.
Best regards,
Vinh Le Thanh

[Roughness with many windbreaks]

Dear Morten Nielsen,
Thank for your answer!
Actually, I try to import roughness from Wed-database, but it not conincide with the background was imported.
And I think roughess map is importance in my case because the elevation is not change too much.
I read in manual, it has some information to made me quite hesistance when decide to digitize the roughness:
- "Shouldn't digitize too large with few width meter, and the rest area digitize too small". So, in this situation with many house focus along the river and road - how to deal with this? Should I digitize detail with this site?
And I should consider the site with how much area (length & width) to decide the roughness?
Best regard,
Vinh Le Thanh

[Roughness with many windbreaks]

Dear all members and admin,
I have a project, but I quite confuse to create the roughness map of project. Because the site mix between the mangroves and water; some position of site have many house focus along the river and road.
I give you the coordinate -WGS 84 -zone 48:
- Latitude: 9.183433°
- Longitude: 105.627373°
Can you give me some recomendations with this situation.
Tks a lot!