These geospatial data and related maps or graphics are not legal documents and are not intended to be used as such. The data and maps may not be used to determine title, ownership, legal descriptions or boundaries, legal jurisdiction, or restrictions that may be in place on either public or private land. Natural hazards may or may not be depicted on the data and maps, and land users should exercise due caution.
The data are dynamic and may change over time. The user is responsible to verify the limitations of the geospatial data and to use the data accordingly. Skip to main content. Clearinghouse Home Help Contact Us. The area encompasses private lands, other governmental agency lands, and may contain National Forest System lands within the proclaimed boundaries of another administrative unit.
New plan development is required for new NFS units; an existing plan may be amended at any time. Each area designation is characterized by a date, boundary status, and authority and may be just one of several designations that comprise a single national designated area. Fish and Wildlife Service.
This is in contrast to Basic Ownership, in which the surface ownership parcels having the same owner are merged together. Basic Ownership provides the general user with the Forest Service versus non-Forest Service view of land ownership within National Forest boundaries.
Surface Ownership provides the land status user with a current snapshot of ownership within National Forest boundaries. Features and attributes of the county layer were adapted to match attributes within the FIA database FIADB and features have been generalized by removing vertices to enhance performance.
Future iterations of this dataset will be produced using refined methods and higher resolution spatial data. Detailed Description: This dataset exhibits the following characteristics: 1. Granularity of the polygon features: The spatial extent of the national forests and the grasslands match the way the agency would like to communicate with the public. This URL could be used on any interactive map applications to link users directly to a forests home page.
All Service Receipts data provides acreage inputs to the FS All Service Receipts program that tracks receipt data by unit and computes revenue sharing payments to states and counties. To display more detailed administrative boundaries for larger scale reference and analysis, the non-generalized ResearchStationBoundaries feature class should be used.
The mapped cessions and reservations included in the 67 maps correspond to entries in Royce's Schedule of Indian Land Cessions Schedule , "indicating the number and location of each cession by or reservation for the Indian tribes from the organization of the Federal Government to and including , together with descriptions of the tracts so ceded or reserved, the date of the treaty, law or executive order governing the same, the name of the tribe or tribes affected thereby, and historical data and references bearing thereon," as set forth in the subtitle of the Schedule.
See our Dataset List for a brief explanation of these products. Direct access is provided via browsable links through our Amazon's Cloud Browse site. Training Video Lesson 4d. Raster Conversion Tools - Information about available raster conversion scripts. Skip to main content. Biodiversity matters for another reason: Plants and animals in the rainforest may hold the cures for diseases and ways to improve the food we produce.
Many of these plants and animals may not have even been discovered yet. With all the life in tropical forests, it can be surprising to learn that tropical soils are actually very thin.
These soils do not have a lot of minerals that plants need to grow, which means they are not ideal for growing crops. The soil comes from rock, and the rain in the tropics washes away its minerals over time. Nearly all the minerals of a tropical forest are in the living plants and the decomposing litter on the forest floor. When an area is completely deforested for farming, the farmer typically burns what is left.
The minerals in the soil are lost. In just a few years, soils often become unable to support crops. If the area is then turned into cattle pasture, it becomes nearly impossible for the forest to be restored. Deforestation affects rainfall and temperature.
Up to 30 percent of the rain that falls in tropical forests is water that the rainforest has recycled into the atmosphere. Water evaporates, condenses into clouds and falls again as rain.
Deforestation is likely to create a drier, hotter climate in the tropics. Tropical deforestation may also affect rainfall patterns far outside the tropics. Deforestation can also turn the tropics into a larger source of carbon emissions, which increases the greenhouse effect and global warming. The trees and plants in the forests contain a lot of carbon. Through photosynthesis, they use carbon dioxide and store carbon in their stems and leaves. Carbon dioxide escapes back into the atmosphere when these stems and leaves decay.
But when people clear the forests, more carbon returns to the atmosphere. NASA supports and conducts research on tropical forests from space-based and ground-based perspectives, helping provide the information that national and international leaders need to develop strategies for sustaining human populations and preserving tropical forest biodiversity.
Measurements of global vegetation are valuable to scientists because they provide insight into the carbon cycle. Carbon cycles through the oceans, soil and rocks, plants on land and in the ocean, and atmosphere. The buildup of carbon dioxide released into the atmosphere by burning fossil fuel is the primary cause of global warming.
The global biosphere has been helping to offset some of the excess carbon dioxide people have been pumping into the atmosphere. Main Menu. About The Atmosphere. Run several pixels test as discussed in Introduction to spatialBfast tutorial to define the correct parameters. Now that we have done some pixel-based testing, it is time to apply bfastmonitor over an entire raster time series. This will allow us to pinpoint the location and timing of changes in our study area.
Pass the arguments for the parameters which you found during pixel-based testing to the bfmSPatial and run it. The output of bfmSpatial is a simple rasterBrick. Individual layers can be extracted as with any rasterBrick object. As noted above, the first layer is the breakpoint timing. We will first convert the breakpoint values to change months using the changeMonth method. The second layer output by bfmSpatial is magnitude. Magnitude is computed as the median residual between expected and observed values throughout the entire monitoring period, meaning that all pixels are assigned a value regardless of whether or not a breakpoint has been detected.
Styled with knitrBootstrap. Tutorial: Forest change tracking using a demo data set Rony Nedkov 28 January, Forest change tracking demo Introduction The bfastSpatial package provides utilities to performs change detection analysis see DeVries et al. In this tutorial the following change detection workflow steps will briefly discussed: Downloading remote sensing scenes Pre-processing the scenes Spatial BFASTMonitor Setting up the working environment Start with setting up your working environment.
R source Loading packages library raster library devtools library bfastSpatial. R source Set the working directory projectPath. R source Read both csv files csv1. R source Create a temporary directory to store the output files. R source Create an extent variable newExtent.
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