Post on 13-Sep-2015
14.12.2014
1
Uzaktan Alglama (2)r. Gr. Dr. zgr ZEYDAN
http://cevre.beun.edu.tr/zeydan/
Uzaktan Alglama Verisi
0
127
255
Brightness value range
(typically 8 bit)Associated gray-scale
10 15 17 20
15 16 18 21
17 1820
2218
2022 24
12
34
1 5432Columns ( j)
Bands (k )
1
2
3
4
X axis Picture element (pixel) at location Line 4, Column 4, in Band 1 has a Brightness Value of 24, i.e., BV4,4,1 = 24 .
black
gray
white21
23
2225
Lines or rows (i)
0
127
255
Brightness value range
(typically 8 bit)Associated gray-scale
10 15 17 20
15 16 18 21
17 1820
2218
2022 24
12
34
1 5432Columns ( j)
Bands (k )
1
2
3
4
X axis Picture element (pixel) at location Line 4, Column 4, in Band 1 has a Brightness Value of 24, i.e., BV4,4,1 = 24 .
black
gray
white21
23
2225
Lines or rows (i)
Raster Veri Format
14.12.2014
2
Uzaktan Alglama Verisi
http://www.tankonyvtar.hu/hu/tartalom/tamop425/0027_DAI6/ch01s03.html
Uzaktan Alglama Verilerinde znrlk
1. Mekansal (Spatial) znrlk Objelerin ayrt edilebilirlii
2. Spektral (Spectral) znrlk Spektral bant says
3. Radyometrik (Radiometric) znrlk Verinin parlaklk deerindeki ayrnt
4. Zamansal (Temporal) znrlk Verinin ka gnde bir topland
14.12.2014
3
Mekansal znrlk
http://www.satimagingcorp.com/services/resources/characterization-of-satellite-remote-sensing-systems/
14.12.2014
4
http://www.satimagingcorp.com/services/resources/characterization-of-satellite-remote-sensing-systems/
Uydular ve Mekansal znrlkleri
http://ej.iop.org/images/1742-2140/9/4/S40/Full/jge422698f3_online.jpg
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5
NAIP aerial imagery in its native 1m format (left) compared to a 10m (middle) and 30m (right) version of the same data. While visual differences are easy to see, the file sizes also change from 2.5MB to 39kB to 23kB.
http://coast.noaa.gov/geozone/you-say-you-want-high-resolution/#.VH3LvnvIDhA
1 m znrlk 2 m znrlk 5 m znrlk
10 m znrlk 20 m znrlk 30 m znrlk
http://www.jmu.edu/cisr/research/sic/rs/resolution.htm
14.12.2014
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Spektral znrlk Sensrn farkl dalga
boylarnda grnt alabilme yeteneidir.
Spektral znrln yksek olmas, belirli bir banttaki dalga boyunun daha dar olarak grntlenmesi ile ilikilidir. http://www.nrcan.gc.ca/earth-sciences/geomatics/satellite-imagery-air-
photos/satellite-imagery-products/educational-resources/9393
Spektral znrlk
http://www.seos-project.eu/modules/remotesensing/remotesensing-c03-p03.html
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Spektral znrlk Yksek: ~ 220 bant Orta: 3 - 15 bant Dk: ~ 3 bant
Landsat = 7 bant
Landsat 7 Bantlar
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Bant Kombinasyonlar
Radyometrik znrlk EMRdeki enerji
farkllklarn ortaya karabilmenin lsdr.
Yksek radyometrik znrlkte EMRdeki enerji deiimleri daha iyi alglanr.
http://www.nrcan.gc.ca/earth-sciences/geomatics/satellite-imagery-air-photos/satellite-imagery-products/educational-resources/9379
2-bit 8-bit
14.12.2014
9
Radyometrik znrlk 1-bit (21): 0 1 4-bit (24): 0 15 8-bit (28): 0 225
http://www.fis.uni-bonn.de/en/recherchetools/infobox/professionals/resolution/ radiometric-resolution
Landsat: 28, 0 - 255
Radyometrik znrlk
http://commons.wikimedia.org/wiki/File:Decreasing_radiometric_resolution_from_L7_15m_panchromatic.svg
14.12.2014
10
Zamansal znrlk Sensrn ayn blgeden ka gnde bir
grnt aldnn lsdr.
Daha sk grnt alnmas yksek zamansal znrln gstergesidir.
Zamansal znrlk
Time
July 1 July 12 July 23 August 3
11 days
16 days
July 2 July 18 August 3
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Zamansal znrlk Yksek : < 24 saat - 3 gn Orta : 4 - 16 gn Dk: > 16 gn
Landsat = 16 gn
TBTAK UZAYUzay Teknolojileri Aratrma Enstits
Yer Gzlem Uydular: Bilsat Rasat Gktrk-2
14.12.2014
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RASAT Aratrma Uydusu
http://uzay.tubitak.gov.tr/tr/uydu-uzay/rasat
RASAT Aratrma Uydusu
http://uzay.tubitak.gov.tr/tr/uydu-uzay/rasat
14.12.2014
13
Gezgin Portalhttps://www.gezgin.gov.tr/
Dosya indirmek iin kurumsal yelik gerekmektedir!
Landsat 7
14.12.2014
14
Landsat TM Bant zellikleri ve Kullanm Alanlar
Bant Kullanm1 Bitki ve toprak arasndaki farkllklar, ormanlk alanlar ve ky
izgisinin haritalanmas2 Canl bitkilerin yeil blmleri3 Farkl bitki trlerinin tespiti, litoloji ve toprak arasndaki snrn
saptanmasnda4 Bitkilerin miktarn saptamada, litolojilerin tanmlanmasnda,
toprak/litoloji ve kara/su arasndaki kontrastl gsterir5 Kurak alanlar, su miktar, kar ve buz arasndaki farkn bulunmasnda6 Scaklk miktar, bitkiler, termal kirliliin ve jeotermal alanlarn
belirlenmesinde7 Litoloji ve toprak arasndaki snrn belirlenmesinde, toprak ve
bitkilerdeki su miktarnn saptanmasnda
http://www.mta.gov.tr/v2.0/birimler/RSC_WEB/index.php?id=ua
Landsat TM Bant zelliklerine Gre Endeksler
Endeksler lemler Bitki indeksi B4-B3Normalize Fark Bitki ndeksi (NDVI) (B4-B3) / (B4+B3) Demir Oksit B3/B1 Kil Mineralleri B5/B7 Demirli Mineraller B5/B4 Mineral Kompozisyonu B5/B7 , B5/B4 , B3/B1 Hidrotermal Kompozisyon B5/B7 , B3/B1 , B4/B3
http://www.mta.gov.tr/v2.0/birimler/RSC_WEB/index.php?id=ua
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GeoEye-1
IKONOS
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QuickBird
SPOT
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Uydular Hakknda Daha Detayl Bilgi in Web Kaynaklar:
http://www.nik.com.tr/content_sistem_uydu_goruntuleri.asp
http://www.satimagingcorp.com/satellite-sensors/
http://www.esa.int/SPECIALS/Eduspace_EN/SEM7YN6SXIG_0.html