説明
The mission of FIA is to determine the extent, condition, volume, growth, and use of trees of timber on the Nation's forest land. FIA is the only program that collects, publishes, and analyzes data from all ownerships of forest land in the United States (Smith 2002). Throughout the 80-year history of the program, inventories have been conducted by a number of geographically dispersed FIA work units. Currently, the national FIA program is implemented by four regionally distributed work units that are coordinated by a National Office in Washington, DC. The four FIA work units are named by the Research Station in which they reside. They are defined as Pacific Northwest Research Station (PNWRS), Northern Research Station (NRS), Rocky Mountain Research Station (RMRS), and Southern Research Station (SRS). NRS was formed from the merger of North Central Research Station (NCRS) and Northeastern Research Station (NERS). Some data items still retain these designations. This iteration of species occurrences contains 18,134,896 records, as of 2014-12-05.
バージョン
次の表は、公にアクセス可能な公開バージョンのリソースのみ表示しています。
引用方法
研究者はこの研究内容を以下のように引用する必要があります。:
Miles P (2015): USFS - Forest Inventory and Analysis - Trees (Private Lands). v1.0. United States Geological Survey. Dataset/Metadata. https://bison.usgs.gov/ipt/resource?r=usfs-fia-trees-private-lands&v=1.0
権利
研究者は権利に関する下記ステートメントを尊重する必要があります。:
パブリッシャーとライセンス保持者権利者は United States Geological Survey。 To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.
GBIF登録
このリソースは GBIF に登録されていません。
キーワード
Metadata; Forest Inventory and Analysis; inventory database; user manual; user guide; monitoring
外部データ
リソース データは他の形式で入手可能です。
| Forest Inventory Data Online (FIDO) | http://apps.fs.fed.us/fia/fido/index.html UTF-8 database |
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連絡先
- 最初のデータ採集者 ●
- 連絡先
- メタデータ提供者
- 論文著者
- 論文著者
- 論文著者
- 論文著者
- 論文著者
- 論文著者
- 論文著者
- 論文著者
- データ処理者
地理的範囲
Alaska, Hawaii, and the lower 48 states.
| 座標（緯度経度） | 南 西 [17.17, -168.2], 北 東 [72.12, -64.88] |
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生物分類学的範囲
Trees species of interest (timber, species of concern, invasive).
| Kingdom | Plantae (plants) |
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時間的範囲
| 開始日 / 終了日 | 1968-01-01 / 2015-01-01 |
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プロジェクトデータ
説明がありません
| タイトル | US Forest Service Forest Inventory and Analysis Program |
|---|---|
| ファンデイング | US Farm Bill |
| Study Area Description | These are areas that were established by Congress during the RARE II process or in other bills. They can be/have been "released" by Congress at a future date, but until then are managed by the agency as wilderness. |
| 研究の意図、目的、背景など（デザイン） | The current national standard FIA plot design was originally developed for the Forest Health Monitoring program (Scott and others 1993). It was adopted by FIA in the mid-1990s and used for the last few periodic inventories and all annual inventories. The standard plot consists of four 24.0-foot radius subplots (approximately 0.0415 or 1/24 acre), on which trees 5.0 inches and greater in diameter are measured. Within each of these subplots is nested a 6.8-foot radius microplot (approximately 1/300th acre) on which trees smaller than 5.0 inches in diameter are measured. A core optional variant of the standard design includes four "macroplots," each with a radius of 58.9 feet (approximately 1/4 acre) that originate at the centers of the 24.0-foot radius subplots. Prior to adoption of the current plot design, a wide variety of plot designs were used. Periodic inventories might include a mixture of designs, based on forest type, ownership, or time of plot measurement. In addition, similar plot designs (e.g., 20 BAF variable-radius plots) might have been used with different minimum diameter specifications (e.g., 1-inch versus 5-inch). |
プロジェクトに携わる要員:
- Custodiansteward(保管者）
収集方法
To use the FIADB effectively, users should acquire a basic understanding of FIA sampling and estimation procedures. Generally described, FIA uses what may be characterized as a three-phase sampling scheme. Phase 1 (P1) is used for stratification, while Phase 2 (P2) consists of plots that are visited or photo-interpreted. A subset of Phase 2 plots are designated as Phase 3 (P3) plots (formerly known as Forest Health Monitoring [FHM] plots) where additional health indicator attributes are collected.
| Study Extent | the fifty United States, on an annual basis as funding allows. |
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| Quality Control | In the past, FIA provided approximate coordinates for its periodic data in the FIADB. These coordinates were within 1.0 mile of the exact plot location (this is called fuzzing). However, because some private individuals own extensive amounts of land in certain counties, the data could still be linked to these owners. In order to maintain the privacy requirements specified in the amendments to the Food Security Act of 1985, up to 20 percent of the private plot coordinates are swapped with another similar private plot within the same county (this is called swapping). This method creates sufficient uncertainty at the scale of the individual landowner such that privacy requirements are met. It also ensures that county summaries and any breakdowns by categories, such as ownership class, will be the same as when using the true plot locations. This is because only the coordinates of the plot are swapped - all the other plot characteristics remain the same. The only difference will occur when users want to subdivide a county using a polygon. Even then, results will be similar because swapped plots are chosen to be similar based on attributes such as forest type, stand-size class, latitude, and longitude (each FIA work unit has chosen its own attributes for defining similarity). |
Method step description:
- For most user applications, such as woodbasket analyses and estimates of other large areas, fuzzed and swapped coordinates provide a sufficient level of accuracy. However, some FIA customers require more precision of plot locations in order to perform analyses by user-defined polygons and for relating FIA plot data to other map-based information, such as soils maps and satellite imagery. In order to accommodate this need, FIA provides spatial data services that allow most of the desired analyses while meeting privacy requirements. The possibilities and limitations for these types of analyses are case-specific, so interested users should contact their local FIA work unit for more information.
追加のメタデータ
| 目的 | The Forest Inventory and Analysis (FIA) Program of the U.S. Forest Service provides the information needed to assess America's forests. As the Nation's continuous forest census, our program projects how forests are likely to appear 10 to 50 years from now. This enables us to evaluate whether current forest management practices are sustainable in the long run and to assess whether current policies will allow the next generation to enjoy America's forests as we do today. |
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| 代替識別子 | https://bison.usgs.gov/ipt/resource?r=usfs-fia-trees-private-lands |