Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

damen, m. c. j.

Bibliographic data

Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856641294

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: IX Seiten, Seiten 551-956

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A,. A. Balkema

Identifier (digital):: 856641294

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(26,7,2)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Damen, M. C. J.

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: 5 Non-renewable resources: Geology, geomorphology and engineering projects. Chairman: J. V. Taranik, Liaison: B. N. Koopmans

Write comment:: Wegen zu enger Bindung kommt es teilweise im Original zu Textverlust.

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Digital analysis of stereo pairs for the detection of anomalous signatures in geothermal fields. E. Zilioli, P. A. Brivio, M. A. Gomarasca & R. Tomasoni

Document type:: Multivolume work

Structure type:: Chapter

689 respective ages. I Infrared and eff. = s. ri .48 -0.16 -54 13 -0.6 -57 18 -0.5b .60 12 -0.49 0 0.5 0.9 0.7 Graan Rod 0-9 0.9 (ftm) Wavolongth Infrarad Figure 5« Diagrams of the mean reflectance derived from the mean values of the base colour components, a) Gl, b) G2, c)LG and d) MA. DN stands for Digital Numbers. We remark a good matching between the diagrams of the subframes G2 and LG; we also observe a decreasing of the mean reflectance from the sub-frame Gl up to MA. This fact would mean a high correlation between the response in reflectance of the surely geothermal zone LG and the zone G2; in both cases thermal IR surveys indicated zones where EV was very small, al most zero. Moreover, the sub-frame MA was the most suspected area, since it was the only spot indicated at the same time both by FATI and by EV function solutions. On the other hand, the sub-frame Gl shows the hi ghest reflectance values and that could fully be cor related to the highest values of FATI previously che cked. The arithmetic means of each band ratio have been correlated to their standard deviations (see fig.6), We remark here that arithmetic means of NDVI sub frames keep almost the same values. That confirms the spots selected show similar vegetational vigour and the mean values of actual NDVI are ranging between 0.15 and O.bk which correspond to the middle levels in the grey scale of fig. 4. Moreover, a noticeable difference appears in the mean values of the IR/Green ratio between G2 and LG; on the contrary, their respective reflectance featu res shown in figure 5, resulted to be almost the sa me. That means the ratio IR/Green has a more discri minating power than the ratio IR/Red and than the spectral signature alone. In particular, the site MA shows the highest values in both ratios and, at the same time, it also pre sents the lowest reflectance mean values in according to the basic concept of a general decay when vegeta tion is submitted to the presence of geothermal fl uids. 255-1 240- M 220- 200- 180- 160- * 140- •K 1*1 Í 120- <fc 100- 80 60 40- 20- 0- 1 ^1 -4 o ^ O «N Q O % — * - o K, O Uj <0 1 ?£ JO . Ï £ e> o O Q o Î O $ :a 1 Î § Figure 6. Diagrams of the mean values of band ratios at different sites, a) IR/Red, b)lR/Green, c) NDVI and d) standard deviation amplitude. These arguments authorize to take the suspected zone MA Poggio Mauriccia into a higher consideration than the other sub-frames. Scattergrams of data also have Deen analysed, al though no particular indication has outcome beside the high correlation that has been found between the Green and Red images, almost in all 4 cases. Scat- tergrams of band ratios IR/Green and IR/Red con firmed the lowest correlation is found for the subframe MA. 4 CONCLUSIONS The application of the Derived Tbermal Quantities method in the Travale geothermal field has given so me unexpected results. At first, neither the old field of Lagoni nor the new one to the north have been particularly pointed out in relation to othen surrounding areas. That gi ves rise to some perplexity on the validity of the method. Nevertheless, some otber interesting indications have been provided. Although the checked sub-frames

Access restriction

Copyright

fullscreen: Remote sensing for resources development and environmental management (Volume 2)

Multivolume work

Volume

Chapter

Chapter

Table of contents

Cite and reuse

Volume

Chapter

Image

Image fragment

Citation links

Citation recommendation