The Potomac River Atlas of Washington County, first published in 2013, has been updated for 2020 and optimized for use with the Avenza App. This atlas is the most complete and detailed map ever created of the 83-miles of the Potomac River in Washington County. The 39 maps include the westernmost section at Sideling Hill Creek, along the river to just east of Weverton Cliffs and Knoxville. The atlas is all inclusive of every natural and manmade feature, with labels: roads, rail lines, bridges, all parks, trails, boat ramps, caves, power lines, tunnels, buildings, canal structures, and a great deal more. The maps include elevations, water flow, and subdivisions. Western Maryland Rail Trail and C&O Canal Towpath mile markers are included. West Virginia (Morgan, Berkeley, and Jefferson Counties) and Virginia (Loudoun County) are included.

The Sacramento River Geomorphic Atlas (1896–2012) (SRGA) documents the geomorphology of the middle reach of the Sacramento River from Red Bluff to Colusa, California, shown in Figure 1. The SRGA was created using a combination of geologic maps, U.S. Geological Survey (USGS) topographic maps, U.S. Department of Agriculture (USDA) and National Agriculture Imagery Program (NAIP) imagery, light detection and ranging (LiDAR) data, other aerial imagery, historical data, and fieldwork performed by California Department of Water Resources (DWR) staff.

The data are presented in a series of maps and imagery showing Pre-Shasta Dam Meanders (Series A), Post-Shasta Dam Meanders (Series B), All Meanders (Series C), Geology (Series D), DEM/LiDAR (Series E), Bank Erosion Characterization (Series F), and Pre- and Post-Shasta Dam Bank Erosion survey sites (Series G). Channel locations are approximate and subject to cumulative errors in the original mapping, scanning, georectification, and digitization process. Depending on the series of maps, other data are also shown, such as bank protection, levees, river mile markers, meander scrolls, paleo channels, and the modern and historical meander belts. Figure 2 shows the general legend and the geologic legend for the map series. For reference, Figures 1 and 2 are also shown at the beginning of each map series. Additional data presented in the SRGA include meander avulsion identification, bank protection identification, river sinuosity, and centerline length.

Copies of this document are available from:

California Department of Water Resources Attention: Publications Office P.O. Box 942836 Sacramento, California 94236-0001 Phone: (916) 653-1097

If you need this publication in alternate form, contact the Public Affairs Office at (800) 272-8869.

All double line river polygons for the province

A slow-moving area of low pressure and a high amount of atmospheric moisture produced heavy rainfall across Louisiana and southwest Mississippi in August 2016. Over 31 inches of rain was reported in Watson, 30 miles northeast of Baton Rouge, over the duration of the event. The result was major flooding that occurred in the southern portions of Louisiana and included areas surrounding Baton Rouge and Lafayette along rivers such as the Amite, Comite, Tangipahoa, Tickfaw, Vermilion, and Mermentau. The U.S. Geological Survey (USGS) Lower Mississippi-Gulf Water Science Center operates many continuous, streamflow-gaging stations in the impacted area. Peak streamflows of record were measured at 10 locations, and seven other locations experienced peak streamflows ranking in the top 5 for the duration of the period of record. In August 2016, USGS personnel made fifty streamflow measurements at 21 locations on streams in Louisiana. Many of those streamflow measurements were made for the purpose of verifying the accuracy of the stage-streamflow relation at the associated gaging station. USGS personnel also recovered and documented 590 high-water marks after the storm event by noting the location and height of the water above land surface. Many of these high water marks were used to create twelve flood-inundation maps for selected communities of Louisiana that experienced flooding in August 2016. This data release provides the actual flood-depth measurements made in selected river basins of Louisiana that were used to produce the flood-inundation maps published in the companion product (Watson and others, 2017). Reference Watson, K.M., Storm, J.B., Breaker, B.K., and Rose, C.E., 2017, Characterization of peak streamflows and flood inundation of selected areas in Louisiana from the August 2016 flood: U.S. Geological Survey Scientific Investigations Report 2017–5005, 26 p., https://doi.org/10.3133/sir20175005.

The atlas contains the location of UK rivers at two scales, a course scale, suitable for viewing at national and regional scales. As you zoom in to a local scale the river lines will change to show a more accurate representation of watercourses.For all drainage basins the pop-up will show

The Atlas of Canada National Scale Data 1:1,000,000 Series consists of boundary, coast, island, place name, railway, river, road, road ferry and waterbody data sets that were compiled to be used for atlas large scale (1:1,000,000 to 1:4,000,000) mapping. These data sets have been integrated so that their relative positions are cartographically correct. Any data outside of Canada included in the data sets is strictly to complete the context of the data.

This North American Atlas data are standardized geospatial data sets at 1:10,000,000 scale. A variety of basic data layers (e.g. roads, railroads, populated places, political boundaries, hydrography, bathymetry, sea ice and glaciers) have been integrated so that their relative positions are correct. This collection of data sets forms a base with which other North American thematic data may be integrated. Any data outside of Canada, Mexico, and the United States of America included in the North American Atlas data sets is strictly to complete the context of the data.The North American Environmental Atlas – Lakes and Rivers dataset displays the coastline, linear hydrographic features (major rivers, streams, and canals), and area hydrographic features (major lakes and reservoirs) of North America at a reference spatial scale of 1:1,000,000.This map offers a seamless integration of hydrographic features derived from cartographic products generated by Natural Resources Canada (NRCan), United States Geological Survey (USGS), National Institute of Statistics and Geography, (Instituto Nacional de Estadística y Geografía-Inegi), National Water Commission (Comisión Nacional del Agua-Conagua).This current version of the North America Lakes and Rivers dataset supersedes the version published by the Commission for Environmental Cooperation in 2011.Files Download

This Atlas is in PDF format showing the Tana River County Hazards

Hydrology of the Kuparuk River basin, including streams, rivers, ponds, lakes, and coastline. The map includes line features as well as polygon features (.shp). This map was drawn by Skip Walker, derived by interpreting the CIR version of the GTOPO30 Landsat MSS image created in 1999 by Jiong Jia. Go to Website Link :: Toolik Arctic Geobotanical Atlas below for details on legend units, photos of map units and plant species, glossary, bibliography and links to ground data. Map Themes: Elevation, Hydrology, Landscape, Landsat MSS False-Color Infrared, Vegetation References Muller, S. V., Walker, D. A., Nelson, F. E., Auerback, N. A., Bockheim, J. G., Guyer, S., & Sherba, D. 1998. Accuracy assessment of a land-cover map of the Kuparuk river basin, Alaska: considerations for remote regions. Photogrammetric Engineering and Remote Sensing, 64(6): 619-628.

Generalized landscape units for Kuparuk River basin. Polygon coverage of landscape units for the Kuparuk River watershed with seven units. This map was drawn by Skip Walker, derived by interpreting the CIR version of the GTOPO30 Landsat MSS image created in 1999 by Jiong Jia. Go to Website Link :: Toolik Arctic Geobotanical Atlas below for details on legend units, photos of map units and plant species, glossary, bibliography and links to ground data. Map Themes: Elevation, Hydrology, Landscape, Landsat MSS False-Color Infrared, Vegetation References Walker, D. A. 2009. Unpublished map.

This dataset provides information about the number of properties, residents, and average property values for Atlas Drive cross streets in Haw River, NC.

The vegetation of the Kuparuk River watershed was mapped for several US National Science Foundation projects, including the Arctic System Science Flux Study and the Long-Term Ecological Research program (Muller et al. 1998). The Kuparuk Basin map is a raster (tif) map, with 50-m pixels, and 8 land cover categories. The boundaries of the map form a rectangle that encompasses the entire Kuparuk River watershed, from the headwaters on the north side of the Brooks Range to the Beaufort Sea coast. The map is based on a modified unsupervised classification of a portion of a Landsat Multispectral Scanner (MSS) composite created by the National Mapping Division, U.S. Geological Survey EROS data center, Anchorage, Alaska. Geobotanical maps and earlier Landsat-derived maps of the region were used for supplementary information to interpret the spectral classes. Go to Website Link :: Toolik Arctic Geobotanical Atlas below for details on legend units, photos of map units and plant species, glossary, bibliography and links to ground data. Map Themes: Elevation, Hydrology, Landscape, Landsat MSS False-Color Infrared, Vegetation References Auerbach, N. A., and D. A. Walker. 1995. Preliminary Vegetation Map, Kuparuk River Basin, Alaska: A Landsat-Derived Classification, Joint Facility for Regional Ecosystem Analysis, Institute of Arctic and Alpine Research. University of Colorado, Boulder. Muller, S. V., Walker, D. A., Nelson, F. E., Auerback, N. A., Bockheim, J. G., Guyer, S., & D. Sherba. 1998. Accuracy assessment of a land-cover map of the Kuparuk river basin, Alaska: considerations for remote regions. Photogrammetric Engineering and Remote Sensing, 64(6): 619-628.

The Atlas of Canada National Scale Data 1:15,000,000 Series consists of boundary, coast and coastal islands, place name, railway, river, road, road ferry and waterbody data sets that were compiled to be used for atlas small scale (1:15,000,000 and 1:30,000,000) mapping. These data sets have been integrated so that their relative positions are cartographically correct. Any data outside of Canada included in the data sets is strictly to complete the context of the data.

The Atlas of Canada National Scale Data 1:5,000,000 Series consists of boundary, coast, island, place name, railway, river, road, road ferry and waterbody data sets that were compiled to be used for atlas medium scale (1:5,000,000 to 1:15,000,000) mapping. These data sets have been integrated so that their relative positions are cartographically correct. Any data outside of Canada included in the data sets is strictly to complete the context of the data.

This data set comprises the Environmental Sensitivity Index (ESI) data for the Hudson River from 1942 to 2005. ESI data characterize estuarine environments and wildlife by their sensitivity to spilled oil. The ESI data include information for three main components: shoreline habitats, sensitive biological resources, and human-use resources. This atlas was developed to be utilized within desktop GIS systems and contains GIS files and related D-base files. Associated files include MOSS (Multiple Overlay Statistical System) export files, .PDF maps, and detailed user guides and metadata.

This GIS grid atlas contains precipitation frequency estimates for the Ohio River Basin and Surrounding states is based on precipitation data collected between 4/1863-12/2000. This atlas is an updated version of Technical Memorandum NWS Hydro 35, Five to 60-minutes Precipitation Frequency for Eastern and Central United States (1977), Technical Paper 40 - Rainfall Frequency Atlas of the United States for Durations from 30 minutes to 24 hours and Return Periods from 1 to 100 Years (1961) and Technical Paper 49 - Two-to-Ten-Day Precipitation for Return Periods of 2 to 100 Years in the Contiguous United States (1964) for the following states: Delaware, District of Columbia, Illinois, Indiana, Kentucky, Maryland, New Jersey, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Virginia and West Virginia. The grids provide information for durations from 5 minutes through 60 days, and for return periods of 2 years through 1000 years. All grids are in geographic coordinate system (WGS72 horizontal datum) and units are in 1000th of inches.

"Heihe River Basin Ecological hydrological comprehensive atlas" is supported by the key project of Heihe River Basin Ecological hydrological process integration research. It aims at data arrangement and service of Heihe River Basin Ecological hydrological process integration research. The atlas will provide researchers with a comprehensive and detailed background introduction and basic data set of Heihe River Basin. The boundary map of the Heihe River Basin in 1985 is one of the basic geographic part of the atlas, with the scale of 1:2500000, the positive axis equal product conic projection, and the standard latitude of 25 47. Data sources: boundary data of Heihe River Basin in 1985, road data of Heihe River Basin in 2010, administrative boundary data of one million Heihe River Basin in 2008, residential area data of Heihe River Basin in 2009 and 100000 river data of 2009.

A 49" x 23" general reference river basin wall map containing river basin boundaries, county boundaries, roads, major water bodies, and cities.

The Statutory Main River Map Variations dataset defines proposed changes to the Statutory Main River Map.

Statutory Main Rivers Map defines statutory watercourses in England designated as Main Rivers by Environment Agency.

Watercourses designated as ‘main river’ are generally the larger arterial watercourses. The Environment Agency has permissive powers, but not a duty, to carry out maintenance, improvement or construction work on designated main rivers.

All other open water courses in England are determined by statute as an ‘ordinary watercourse’. On these watercourses the Lead Local flood Authority or, if within an Internal Drainage District, the Internal Drainage Board have similar permissive powers to maintain and improve.

The Environment Agency notifies the public and interested parties of our intentions to make a change to the statutory main river map and decides which watercourses are designated as Main Rivers following a legal process to determine and publish changes.

The change, or variation, to the Statutory Main River Map is either a deletion (also known as a demainment) or an addition (also known as an enmainment).

There are two reasons for a change to the Statutory Main River Map - Designation and Factual.

Designation changes are required when we make a decision to lengthen or shorten the section of a river designated as a 'main river'. These changes will determine which risk management authority may carry out maintenance, improvement or construction work on the watercourse. These changes result also in differing legislation applying to the riparian owner and others with an interest.

Factual changes may be required to update the map to represent the real position of the watercourse. They do not involve any changes of authority or management. Typical examples of factual changes are when: a watercourse has changed course naturally, a watercourse has been diverted or a survey of a culvert shows a different alignment.

A change to the Statutory Main River Map goes through the following stages (identified as Status within the data):

• Draft
• Consultation
• Pending Determination
• Determination
• Appeals
• Pending Appeals
• Pending Implementation
• Implemented (Month and Year)

Arctic Vegetation Archive - Alaska: Colville River Delta. Pending evaluation. Jorgenson, M. T., J. E. Roth, E. R. Pullman, R. M. Burgess, M. K. Raynolds, A. A. Stickney, M. D. Smith & T. M. Zimmer. (1997).