Proceedings of Symposium on Remote Sensing and Photo Interpretation: Proceedings of Symposium on Remote Sensing and Photo Interpretation

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Multivolume work

Persistent identifier:: 842147969

Title:: Proceedings of Symposium on Remote Sensing and Photo Interpretation

Sub title:: October 7 - 11, 1974, Banff, Alberta, Canada

Year of publication:: 1974

Place of publication:: Ottawa, Ontario

Publisher of the original:: Canadian Inst. of Surveying

Identifier (digital):: 842147969

Language:: German

Other Title:: Nebentitel: Proceedings : Symposium on Remote Sensing and Photo Interpretation

Corporations:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Adapter:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Founder of work:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Other corporate:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Document type:: Multivolume work

Volume

Persistent identifier:: 84214806X

Title:: Proceedings of Symposium on Remote Sensing and Photo Interpretation

Sub title:: October 7 - 11, 1974, Banff, Alberta, Canada

Scope:: VII, 465 Seiten

Year of publication:: 1974

Place of publication:: Ottawa, Ontario

Publisher of the original:: Canadian Inst. of Surveying

Identifier (digital):: 84214806X

Illustration:: Illustration, Diagramme, Karten

Signature of the source:: T 15 B 1305

Language:: German

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

Corporations:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Adapter:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Founder of work:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Other corporate:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2015

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: WATER AND WETLANDS CHAIRMAN. - R. ELLEFSON

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: THE USE OF ERTS IMAGERY FOR LAKE CLASSIFICATION. F. L. Scarpace, R. E. Wade and L. T. Fisher

Document type:: Multivolume work

Structure type:: Chapter

light proportional to a known exposure. The transmitted light was measured through each step of the film wedge on each frame. A transmittance versus exposure curve was plotted for each frame and this was used to find the exposure related to the densitometric reading for each of the lakes. All the above calculations were done with computer programs developed for this project. The program includes a graphing subroutine for plotting exposure versus secchi depths. These plots are shown in Figures 1-6. The programs include provisions for inputting calculated lake exposures and secchi depths into a non-linear regression curve fitting subroutine for statistical analysis. Of the four ERTS bands, band 5 and, to a slightly lesser extent, band 4 showed the best relation between lake image exposure and secchi depth. Band 5 of the multispectral scanner senses red band wavelengths from .6-.7y. The plot of band 5 exposure versus secchi depth is shown in Figure 2. An expo nential model was used to calculate the least squares regression represented by the solid line. The following equation describes this line: EXPOSURE = .0543 + .148e* 073 ( secchl de P th ) The root mean square residual (standard deviation) about the regression line is .02524. The mean measurement error in band 5 of two replicate sets of 14 lakes was 6%. Given this small measurement error, much of the scanner about the regression line can be assumed to be a function of the 1 to 25 day interval between the sampling date and ERTS overflight date. The root mean square residual is an indicator of how reliably the fitted curve predicts a secchi depth for a given exposure. Assuming a normal error distribution, an envelope of one standard deviation (.0254) on each side of the fitted curve can be expected to contain a given lake exposure 68% of the time (see Figure 6). An envelope of two standard deviations (.0508) on each side of the curve will contain a given lake exposure 95% of the time. The plot of band 4 (green band, wavelength .5-.6y) lake exposure is shown in Figure 1. There is very little contrast in band 4 between the lake image and the land surrounding it. To reduce the chance of measurement error caused by the inability to distinguish between the two, 12 of the smaller lakes were not analyzed, leaving 25 lakes in the band 4 sample. The expo nential equation describing the least squares fit is: EXPOSURE = .144 ♦ .176e' 0979(seCChl de P th3 The root mean square residual (standard deviation) is .0402. The mean measurement error in band 4, calculated from two replicate sets of 14 lakes, is 4%. The plots of the infrared wavelengths, band 6 (.7-.8y) and band 7 (.8-l.ly) exposure versus secchi depths are shown in Figures 3 and 4 respectively. There was no significant correlation between lake exposure and secchi depth in either of these two bands.

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