Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search

Show/Hide Search Form

Date Range:
rss feed Subscribe to R&D Publications recently added to Treesearch - RSS feedMore RSS options

Displaying 1 - 15 of 15
Records Per Page:
Sort By:

  1. Rapid digitization to reclaim thematic maps of white-tailed deer density from 1982 and 2003 in the conterminous US

    Despite availability of valuable ecological data in published thematic maps, manual methods to transfer published maps to a more accessible digital format are time-intensive. Application of object-based image analysis makes digitization faster.

    Author(s):
    Brice Hanberry; Phillip Hanberry
    Year:
    2020
    Keywords:
    eCognition, GIMP, herbivory, historical geography, object-based image analysis
    Source:
    PeerJ. 8: e8262.

  2. Design and analysis for thematic map accuracy assessment: Fundamental principles

    Land-cover maps are used in numerous natural resource applications to describe the spatial distribution and pattern of land-cover, to estimate areal extent of various cover classes, or as input into habitat suitability models, land-cover change analyses, hydrological models, and risk analyses. Accuracy assessment quantifies data quality so that map users may evaluate...

    Author(s):
    Stephen V. Stehman; Raymond L. Czaplewski
    Year:
    1998
    Keywords:
    thematic map, land-cover maps, spatial distribution, data quality
    Source:
    Remote Sensing of Environment. 64: 331-344.

  3. Accuracy assessment of maps of forest condition: Statistical design and methodological considerations [Chapter 5]

    No thematic map is perfect. Some pixels or polygons are not accurately classified, no matter how well the map is crafted. Therefore, thematic maps need metadata that sufficiently characterize the nature and degree of these imperfections. To decision-makers, an accuracy assessment helps judge the risks of using imperfect geospatial data. To analysts, an accuracy...

    Author(s):
    Raymond L. Czaplewski
    Year:
    2003
    Keywords:
    accuracy assessment, geospatial data, thematic maps, metadata
    Source:
    In: Wulder, Michael A.; Franklin, Steven E., eds. Remote Sensing of Forest Environments: Concepts and Case Studies. Boston, MA: Kluwer Academic Publishers. p. 115-140.

  4. Comparison of LiDAR-derived data and high resolution true color imagery for extracting urban forest cover

    Remote sensing has many applications in forestry. Light detection and ranging (LiDAR) and high resolution aerial photography have been investigated as means to extract forest data, such as biomass, timber volume, stand dynamics, and gap characteristics. LiDAR return intensity data are often overlooked as a source of input raster data for thematic map creation. We...

    Author(s):
    Aaron E. Maxwell; Adam C. Riley; Paul Kinder
    Year:
    2013
    Keywords:
    Source:
    In: Miller, Gary W.; Schuler, Thomas M.; Gottschalk, Kurt W.; Brooks, John R.; Grushecky, Shawn T.; Spong, Ben D.; Rentch, James S., eds. Proceedings, 18th Central Hardwood Forest Conference; 2012 March 26-28; Morgantown, WV; Gen. Tech. Rep. NRS-P-117. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 261-275.

  5. Monitoring Global Crop Condition Indicators Using a Web-Based Visualization Tool

    Global crop condition information for major agricultural regions in the world can be monitored using the web-based application called Crop Explorer. With this application, U.S. and international producers, traders, researchers, and the public can access remote sensing information used by agricultural economists and scientists who predict crop production worldwide. For...

    Author(s):
    Bob Tetrault; Bob Baldwin
    Year:
    2006
    Keywords:
    monitoring, assessment, sustainability, Western Hemisphere, sustainable management, ecosystem resources, global crop condition, indicators, Crop Explorer
    Source:
    In: Aguirre-Bravo, C.; Pellicane, Patrick J.; Burns, Denver P.; and Draggan, Sidney, Eds. 2006. Monitoring Science and Technology Symposium: Unifying Knowledge for Sustainability in the Western Hemisphere Proceedings RMRS-P-42CD. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 744-748

  6. Misclassification bias in areal estimates

    In addition to thematic maps, remote sensing provides estimates of area in different thematic categories. Areal estimates are frequently used for resource inventories, management planning, and assessment analyses. Misclassification causes bias in these statistical areal estimates. For example, if a small percentage of a common cover type is misclassified as a rare...

    Author(s):
    Raymond L. Czaplewski
    Year:
    1992
    Keywords:
    remote sensing, forest inventories, misclassification, bias
    Source:
    Photogrammetric Engineering and Remote Sensing. 58(2): 189-192

  7. Variance approximations for assessments of classification accuracy

    Variance approximations are derived for the weighted and unweighted kappa statistics, the conditional kappa statistic, and conditional probabilities. These statistics are useful to assess classification accuracy, such as accuracy of remotely sensed classifications in thematic maps when compared to a sample of reference classifications made in the field. Published...

    Author(s):
    R. L. Czaplewski
    Year:
    1994
    Keywords:
    Kappa, remote sensing, photo-interpretation, stratified random sampling, cluster sampling, multiphase sampling, multivariate composite estimation, reference data, agreement
    Source:
    Res. Pap. RM-316. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 29 p.

  8. Thematic and positional accuracy assessment of digital remotely sensed data

    Accuracy assessment or validation has become a standard component of any land cover or vegetation map derived from remotely sensed data. Knowing the accuracy of the map is vital to any decisionmaking performed using that map. The process of assessing the map accuracy is time consuming and expensive. It is very important that the procedure be well thought out and...

    Author(s):
    Russell G. Congalton
    Year:
    2007
    Keywords:
    Source:
    In: McRoberts, Ronald E.; Reams, Gregory A.; Van Deusen, Paul C.; McWilliams, William H., eds. Proceedings of the seventh annual forest inventory and analysis symposium; October 3-6, 2005; Portland, ME. Gen. Tech. Rep. WO-77. Washington, DC: U.S. Department of Agriculture, Forest Service: 149-154.

  9. Accuracy assessments and areal estimates using two-phase stratified random sampling, cluster plots, and the multivariate composite estimator

    Consider the following example of an accuracy assessment. Landsat data are used to build a thematic map of land cover for a multicounty region. The map classifier (e.g., a supervised classification algorithm) assigns each pixel into one category of land cover. The classification system includes 12 different types of forest and land cover: black spruce, balsam fir,...

    Author(s):
    Raymond L. Czaplewski
    Year:
    2000
    Keywords:
    accuracy assessments, areal estimates, two-phase stratified random sampling, cluster plots, multivariate composite estimator, Landsat data, map classifier
    Source:
    In: Mowrer, H. Todd; Congalton, Russell G., editors. Quantifying spatial uncertainty in natural resources: Theory and applications for GIS and remote sensing. Chelsea, MI: Ann Arbor Press. p. 79-100.

  10. Relationships between water table and model simulated ET

    This research was conducted to develop relationships among evapotranspiration (ET), percolation (PERC), groundwater discharge to the stream (GWQ), and water table fluctuations through a modeling approach. The Soil and Water Assessment Tool (SWAT) hydrologic and crop models were applied in the Big Sunflower River watershed (BSRW; 7660 km2) within the Yazoo River Basin...

    Author(s):
    Prem B. Parajuli; Gretchen F. Sassenrath; Ying Ouyang
    Year:
    2013
    Keywords:
    Source:
    Groundwater 52(2):303–310.

  11. Geospatial Data Availability for Haiti: An Aid in the Development of GIS-Based Natural Resource Assessments for Conservation Planning.

    This report documents the type and source of geospatial data available for Haiti. It was compiled to serve as a resource for geographic information system (GIS)-based land management and planning. It will be useful for conservation planning, reforestation efforts, and agricultural extension projects. Our study indicates that there is a great deal of geospatial...

    Author(s):
    Maya Quinones; William Gould; Carlos D. Rodriguez-Pedraza
    Year:
    2007
    Keywords:
    Haiti, remote sensing, conservation planning, GIS, geospatial data, reforestation efforts, watershed restoration.
    Source:
    U.S. Department of Agriculture, Forest Service, International Institute of Tropical Forestry. Gen. Tech. Rep.IITF-GTR-33.

  12. The Southern Annual Forest Inventory System

    The Southern Annual Forest Inventory System (SAFIS) is in various stages of implementation in 7 of the 13 southern states serviced by the Southern Research Station. The SAFIS design is an interpenetrating design where the n units (1/6 acre plots) are divided into k = 5 panels, each panel containing m = n...

    Author(s):
    Gregory A. Reams; Paul C. van Deusen
    Year:
    1999
    Keywords:
    Source:
    Journal of Agricultural, Biological, and Environmental Statistics. 4(4): 346-360.

  13. Spatial relationships among lightning, precipitation and vegetative cover in watersheds of the Rio Puerco Basin: An introduction

    This paper explores the question "is there a relationship between seasonal precipitation amounts and vegetative cover at a specific site near Grants, New Mexico?" Several hypotheses will be investigated. One is that the organizing factor for vegetation response to precipitation is the amount of summer precipitation from convective thunderstorms. The variable...

    Author(s):
    Deborah Ulinski Potter; Susan M. Gorman
    Year:
    1996
    Keywords:
    riparian ecosystems, human dimensions, hydrology, ecology, history, restoration
    Source:
    In: Shaw, Douglas W.; Finch, Deborah M., tech coords. Desired future conditions for Southwestern riparian ecosystems: Bringing interests and concerns together. 1995 Sept. 18-22, 1995; Albuquerque, NM. General Technical Report RM-GTR-272. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. p. 113-127.

  14. A comparison of FIA plot data derived from image pixels and image objects

    The use of Forest Inventory and Analysis (FIA) plot data for producing continuous and thematic maps of forest attributes (e.g., forest type, canopy cover, volume, and biomass) at the regional level from satellite imagery can be challenging due to differences in scale. Specifically, classification errors that may result from assumptions made between what the field data...

    Author(s):
    Charles E. Werstak
    Year:
    2012
    Keywords:
    statistics, estimation, sampling, modeling, remote sensing, forest health, data integrity, environmental monitoring, cover estimation, international forest monitoring
    Source:
    In: Morin, Randall S.; Liknes, Greg C., comps. Moving from status to trends: Forest Inventory and Analysis (FIA) symposium 2012; 2012 December 4-6; Baltimore, MD. Gen. Tech. Rep. NRS-P-105. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. [CD-ROM]: 440-447.

  15. Risk factor as a strategy to validate the prioritization of areas for wildfire protection

    The limited availability of resources for wildfire management necessitates prioritizing forest areas for protection. For this purpose, criteria such as fire risk are used to generate thematic maps intended to support decision-making. However, prior to this, the information must be validated under a statistically robust process. Unfortunately, no such process currently...

    Author(s):
    José G. Flores Garnica; Alejandra Macías; Uri D. Casillas
    Year:
    2019
    Keywords:
    Priority areas, risk factor (RF), reference sites (RS)
    Source:
    Gen. Tech. Rep. PSW-GTR-261 (English). Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 215-227.
Show More
Show Fewer
Total Publications in Treesearch: 55,819

Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/search?keywords=%22thematic+map%22