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ERDAS: create contour/DEM from stereo images
By maunaloa,
Hi everyone!
My friend told me, that erdas imagine can create dem/contour from two images (a stereo image pair). He told me, erdas need some point, with known x,y, z coordinates. After the points are identified on the stereo pair, the program can recognize the surface, and create DEM.
Anyone have idea, how can i make it?
olla
How to set mapguide in windows 7 32bit Operating System
By Anand,
Hi,
I have Windows 7 32bit Operating system configured with IIS 7, and I have installed Mapguide 2.0 as well as Mapguide Maestro, but it doesn't work when i login to Maestro with Administrator and admin as userid and password respectively. Please help me...
ASEAN GEOMATICS SEMINAR NOVOTEL, 16-18 MARCH 2011
By Lurker,
ASEAN FEDERATION OF LAND SURVEYING AND GEOMATICS (AFLAG) Menyelenggarakan seminar dan pertemuan internal yang ke-41 di Yogyakarta, 16-18 Maret 2011 ini.
Presiden AFLAG, Ibu Dra. Diah Kirana Kresnawati, M.Sc. yang saat ini juga menjabat sebagai Kepala Pusat Atlas Bakosurtanal menggandeng PUSPICS Fakultas Geografi UGM dan Jurusan TeknIk Geodesi, serta Ikatan Surveyor Indonesia (ISI) dan Badan Pertanahan Nasional (BPN) untuk menjadi... tuan rumah dalam acara ini.
Acara AFLAG ini terbagi menjadi
Asian Conference on remote Sensing, Taiwan. Oktober 2011
By Lurker,
* March 1, 2011: Abstract Submission is available.
* March 1, 2011: Information on Sponsoring and Exhibiting has been updated.
* October 15, 2010:ACRS 2011 Website Open.
For the detail
http://www.acrs2011.org.tw/acrs2011/
role of statistics in digitization
By jaylew,
I am presently taking a post grad diploma in GIS and need some info on the use of statistics in municipal asset management digitization..... anything would be appreciated referances, web posts, case studies etc. thank you,
jaylew
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Hello folks! I am trying to use the Lyzenga Algorithm for estimating the depth of water in shallower areas, probably depths under 8-10 meters of lakes. First of all, how accurate is this algorithm in practice? Secondly, lets say i have the band values. can someone explain me how to retrieve those depths? I am following the "Lyzenga Algorithm for Shallow Water Mapping Using Multispectral Sentinel-2 Imageries in Gili Noko Waters" paper, but there are 3 steps of getting NDWIs, NDCIs and after filtering the Sun Glint Correction, then it finally comes to the depth calculating. it end ups in a formula of following: 𝑧 = 28.32 ∗ 𝑋1 − 36.25 ∗ 𝑋2 + 9.42 ∗ 𝑋3 + 16.35 x1 , x2, x3 are RGB values respectively. What do you guys think? can i just apply this formula ? if not, what is the purpose of all the previous steps, and will they change the rgb values anyways? -
Hello folks! I am trying to use the Lyzenga Algorithm for estimating the depth of water in shallower areas, probably depths under 8-10 meters of lakes. First of all, how accurate is this algorithm in practice? Secondly, lets say i have the band values. can someone explain me how to retrieve those depths? I am following the "Lyzenga Algorithm for Shallow Water Mapping Using Multispectral Sentinel-2 Imageries in Gili Noko Waters" paper, but there are 3 steps of getting NDWIs, NDCIs and after filtering the Sun Glint Correction, then it finally comes to the depth calculating. it end ups in a formula of following: 𝑧 = 28.32 ∗ 𝑋1 − 36.25 ∗ 𝑋2 + 9.42 ∗ 𝑋3 + 16.35 x1 , x2, x3 are RGB values respectively. What do you guys think? can i just apply this formula ? if not, what is the purpose of all the previous steps, and will they change the rgb values anyways?
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