Planning a national forest inventory:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Washington, D.C.
FAO
1950
|
| Schriftenreihe: | FAO forestry and forest products studies
1 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | VIII, 88 S. |
Internformat
MARC
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| 246 | 1 | 3 | |a National forest inventory |
| 264 | 1 | |a Washington, D.C. |b FAO |c 1950 | |
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| 490 | 1 | |a FAO forestry and forest products studies |v 1 | |
| 650 | 4 | |a Inventaires forestiers | |
| 650 | 4 | |a Forest surveys | |
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Datensatz im Suchindex
| _version_ | 1804135061357854720 |
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| adam_text | FAG FORESTRY AND FOREST PRODUCTS STUDIES
No 1
Planning a
National
Forest
Inventory
This study was undertaken on instructions from the
Conference of FAO, as part of the work of the For-
estry and Forest Products Division It represents
the views of the Division on the subjects dealt with
These views have been formulated after extensive
consultation with governmental and commercial
authorities, whose assistance is gratefully acknowl-
edged The study was written by
JDB HARRISON
Chief of the Economics Section
Dixnsion of Forestry and Forest Products
Fachbibliothek Zellstoff und Papier
TU Darmstadt
59610007
Washington, DC,USA
September 19r0
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
Contents
Preface ______________________________________________________ vii
I The Forest Inventory_________________________________________ 1
Factors Influencing Survey Costs_________________________ 4
The Urgent Need for Forest Inventories________________ 7
Definition of a Forest Inventory_________________________ 9
Forest Areas _____________________________________ 9
Forest Ownership ____________________________________ 10
Volumes of Standing Timber_________________________ 10
Growth ______________________________________________ 11
Drain _____________ ____________ ____________________ 11
Periodicity _________________________________________ 12
II Planning ___________________________________________________ 14
Allocation of Functions and Responsibilities_________ 15
Functions of Government_________________________________ 16
Responsibilities of Technical Authorities____________ 17
III Forest Classification______ 21
Classification Based on Present Conditions 23
Classification of Nonproductive Forests______________ 25
Nonforested Areas ___________________________________ 25
Classification Based on Historical Factors______________ 25
Ownership Classes ______________________________________ 26
IV Maps and Mapping_______________________________________ 27
Preparation of New Maps 28
Map Scales ____________________________________________ 30
Map Features _______________________________________ 31
Forest Maps __________________________________________ 32
Care and Filing of Maps_________________________________ 32
Map Reproduction _______________________________________ 33
iii
V Aerial Surveys______________________________________________
Aerial Sketching _______________________________________
Aerial Photography and Photogrammetry-------------------
Types of Aerial Photographs_____________________________
Characteristics of Photographs__________________________
Scale ________________________________________________
Focal Length of Lens__________________________________
Films and Filters_____________________________________
Size of Pictures__________ ___________________________
Contact Prints and Enlargements_______________________
Aerial Surveying _______________________________________
Use of Aerial Photographs_______________________________
Base Maps ____________________________________________
Mosaics ______________________________________________
Interpretation of Forestry Information________________
Forest Mapping _______________________________________
Tree Heights __________ ______________________________
Crown Widths _____________
Density ______________________________________________
Tree Species __________ - ----------------------------
Volumes ______________________________________________
Site Classification __________________________________
Use of Photographs in the Field_______________________
Instruments Used in Forestry Interpretation-------------
Specifications for Aerial Surveys______ 1_______________
Costs of Aerial Surveys_________________________________
Selected References: Aerial Surveys_____________________
VI Ground Surveys ____________________________________________
Sampling _______________________________________________
Stratification _______________________________________
Systematic Sampling ______ ___________________________
Random Sampling ___________________________________ -
Systematic vs Random Sampling in
Undeveloped Forests _______________________________
Selective Sampling ___________________________________
iv
31
31
35
37
38
38
39
41
41
42
42
45
4f
46
47
48
48
49
49
50
50
51
51
52
53
54
56
58
58
60
61
63
65
66
Principal Measurements ___________________________ 67
Measurement of Areas__________________________ 67
Measurement of Trees____________________________ 68
Units of Measurement_____________________________ 70
Measurement of Growth_________________________ 71
Measurement of Drain____________________________ 73
Supplementary Measurements and Observations________ 74
Soil Conditions ________________________________ 71
Minor Vegetation _______________________________ 75
Natural Reproduction ____________________________ 75
Treatment Required ______________________________ 75
Topography ______________________________________ 76
Selected References: Ground Surveys _______________ 76
VII Field Work, Compilation, and Reports __________ 79
Field Records _____________________________________ 81
Compilation ______________________________________ 82
The Final Report__________________________________ 83
Appendix A Equivalents ---------------------------------- 65
Appendix B Definitions ---------------------------------- 86
|
| adam_txt |
FAG FORESTRY AND FOREST PRODUCTS STUDIES
No 1
Planning a
National
Forest
Inventory
This study was undertaken on instructions from the
Conference of FAO, as part of the work of the For-
estry and Forest Products Division It represents
the views of the Division on the subjects dealt with
These views have been formulated after extensive
consultation with governmental and commercial
authorities, whose assistance is gratefully acknowl-
edged The study was written by
JDB HARRISON
Chief of the Economics Section
Dixnsion of Forestry and Forest Products
Fachbibliothek Zellstoff und Papier
TU Darmstadt
59610007
Washington, DC,USA
September 19r0
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
Contents
Preface _ vii
I The Forest Inventory_ 1
Factors Influencing Survey Costs_ 4
The Urgent Need for Forest Inventories_ 7
Definition of a Forest Inventory_ 9
Forest Areas _ 9
Forest Ownership _ 10
Volumes of Standing Timber_ 10
Growth _ 11
Drain _ _ _ 11
Periodicity _ 12
II Planning _ 14
Allocation of Functions and Responsibilities_ 15
Functions of Government_ 16
Responsibilities of Technical Authorities_ 17
III Forest Classification_ 21
Classification Based on Present Conditions 23
Classification of Nonproductive Forests_ 25
Nonforested Areas _ 25
Classification Based on Historical Factors_ 25
Ownership Classes _ 26
IV Maps and Mapping_ 27
Preparation of New Maps 28
Map Scales _ 30
Map Features _ 31
Forest Maps _ 32
Care and Filing of Maps_ 32
Map Reproduction _ 33
iii
V Aerial Surveys_
Aerial Sketching _
Aerial Photography and Photogrammetry-------------------
Types of Aerial Photographs_
Characteristics of Photographs_
Scale _
Focal Length of Lens_
Films and Filters_
Size of Pictures_ _
Contact Prints and Enlargements_
Aerial Surveying _
Use of Aerial Photographs_
Base Maps _
Mosaics _
Interpretation of Forestry Information_
Forest Mapping _
Tree Heights _ _
Crown Widths _
Density _
Tree Species _ - ----------------------------
Volumes _
Site Classification _
Use of Photographs in the Field_
Instruments Used in Forestry Interpretation-------------
Specifications for Aerial Surveys_ 1_
Costs of Aerial Surveys_
Selected References: Aerial Surveys_
VI Ground Surveys _
Sampling _
Stratification _
Systematic Sampling _ _
Random Sampling _ -
Systematic vs Random Sampling in
Undeveloped Forests _
Selective Sampling _
iv
31
31
35
37
38
38
39
41
41
42
42
45
4f
46
47
48
48
49
49
50
50
51
51
52
53
54
56
58
58
60
61
63
65
66
Principal Measurements _ 67
Measurement of Areas_ 67
Measurement of Trees_ 68
Units of Measurement_ 70
Measurement of Growth_ 71
Measurement of Drain_ 73
Supplementary Measurements and Observations_ 74
Soil Conditions _ 71
Minor Vegetation _ 75
Natural Reproduction _ 75
Treatment Required _ 75
Topography _ 76
Selected References: Ground Surveys _ 76
VII Field Work, Compilation, and Reports _ 79
Field Records _ 81
Compilation _ 82
The Final Report_ 83
Appendix A Equivalents ---------------------------------- 65
Appendix B Definitions ---------------------------------- 86 |
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| indexdate | 2024-07-09T20:34:31Z |
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| language | English |
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| physical | VIII, 88 S. |
| publishDate | 1950 |
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| series | FAO forestry and forest products studies |
| series2 | FAO forestry and forest products studies |
| spelling | Harrison, John Darley Braithwaite Verfasser aut Planning a national forest inventory The study was written by J. D. B. Harrison National forest inventory Washington, D.C. FAO 1950 VIII, 88 S. txt rdacontent n rdamedia nc rdacarrier FAO forestry and forest products studies 1 Inventaires forestiers Forest surveys FAO forestry and forest products studies 1 (DE-604)BV004845022 1 HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014598661&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Harrison, John Darley Braithwaite Planning a national forest inventory FAO forestry and forest products studies Inventaires forestiers Forest surveys |
| title | Planning a national forest inventory |
| title_alt | National forest inventory |
| title_auth | Planning a national forest inventory |
| title_exact_search | Planning a national forest inventory |
| title_exact_search_txtP | Planning a national forest inventory |
| title_full | Planning a national forest inventory The study was written by J. D. B. Harrison |
| title_fullStr | Planning a national forest inventory The study was written by J. D. B. Harrison |
| title_full_unstemmed | Planning a national forest inventory The study was written by J. D. B. Harrison |
| title_short | Planning a national forest inventory |
| title_sort | planning a national forest inventory |
| topic | Inventaires forestiers Forest surveys |
| topic_facet | Inventaires forestiers Forest surveys |
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