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

Type of content:: Konferenzschrift

Info on language/writing:: Beiträge überwiegend in englischer, teilweise in französischer und deutscher Sprache

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

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

DOI:: 10.14463/GBV:84214806X

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:: International Society for Photogrammetry; Commission Interpretation of Data; Canadian Institute of Surveying

Author:: Symposium on Remote Sensing and Photo Interpretation, 1974; Banff, Alberta

Adapter:: International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Founder of work:: International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Other corporate:: 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:: RESOURCE INVENTORIES CHAIRMAN. - H. VERSTAPPEN

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: FORESTRY AERIAL PHOTO-INTERPRETATION AND RESOURCE INVENTORIES IN INDIA. K. P. Tiwari

Document type:: Multivolume work

Structure type:: Chapter

units was felt» So far an area of nearly 14.5 million ha. covering about 2 0 % of the entire forest area in different zones has been covered under regional inventories. The results have indicated useful potential for paper and pulp, saw milling, plywood and other wood based industries. One of the interesting facts revealed is that the total growing stock has been very much underestimated in the past small area inventories. "Role of Aerial Photographs" Aerial photographs were mainly used for forest type delinea tion, preparation of base maps and inventory maps, area determination of forest types and location of ground sample plots in the field. By restricting the inventory field, work in forested areas alone saved the cost and time by about 30% o Location of ground sample plots was found to be easier and much more reliable than conventional topographic line maps. The experience was varied in different types of forests on different scales. On smaller scales and in dense forests with poor identifiable features the plot centres were located by bearings and distance measurement for short traverses. In most of the cases the plot centre could be located by the image of the surroundings. Worst cases were in tropical wet Evergreen forests where plot location was mainly done by traversing. "Sampling Designs" In the initial stages, three different types of sampling designs were used in three different regions, in the Southern zone consisting of tropical wet evergreen forests, systematic strip plot sampling was used. In the central zone consisting of tropical moist and dry deciduous forests, a systematic cluster sampling with two plots in each cluster was used. In the Northern coniferous forest zone simple random point sampling was adopted. The usual method has been to systematically lay out sample plots on grid intersections (Latitude and Longitude) which provided the centre of the first plot of cluster. The intensity of the grids varied in different regions from 5'x5‘ to 1 1' x 11' depending on the varia- 4 bility and precision fixed. In general a precision of _+ 10% was prescribed'. Investigations into the optimum sampling design for different forest types were undertaken as exercises at IPI. Designs based on simple random sampling, line plot sampling, stratified random sampling with fixed plot size and variable plot sampling were tried. In the coni ferous forest zone of the Himalayas, stratification in volume classes was done and volume per unit area measured by variable plot sampling. Due to topographic consideration this method was found useful. In tropical forest areas line plot and stratified plot sampling were tried and in areas where stratification into different forest types or volume classes could be done this gave useful results, with fixed plot size. TIWARI ( 9 ) conducted investigations into fixed plot and variable plot sampling in Sal forests of Dehra Dun and no significant differences were found for basal area and volume estimates but tree count estimates were poor with variable plot sampling. However, in the majority of the tropical deciduous type of forest where forests are irregular and trees

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