Volcanos Slide Silently To Their Death East of Fiji, between Tonga and Samoa, is a feisty, earthquake-prone fault zone called the Tonga Trench that is the second-deepest submarine canyon in the world. Researchers have found that dozens of giant, flat-topped old undersea volcanoes quickly march toward the trench, ultimately taking the final plunge into the abyss. Earthquakes and resulting tsunamis are a concern at the Tonga Trench, just as they are along the Japan Trench and the even deeper Mariana Trench to the south, near Guam. BLOG: Time-Lapse Animation Shows Japan's Earthquakes A whopping 10.9 kilometers deep in some areas, the Tonga Trench marks the boundary where a westward-moving chunk of the earth’s outer crust, the Pacific plate, is forced downward beneath the Indo-Australian plate next door. Geologists long assumed that the destruction of giant volcanoes along these so-called subduction zones might add to the risk of earthquakes there. WIDE ANGLE: Japan in Crisis The ultimate fate of the volcanoes is still unclear.
GIS Tools for Hadoop by Esri Looking at data without location, most of the time seems like looking at just part of a story. Including location and geography in analysis reveals patterns and associations that otherwise are missed. As Big Data emerges as a new frontier for analysis, including location in Big Data is becoming significantly important. Data that includes location, and that is enhanced with geographic information in a structured form, is often referred to as Spatial Data. GIS Tools for Hadoop is an open source toolkit intended for Big Spatial Data Analytics. Esri Geometry API for Java: A generic geometry library, can be used to extend Hadoop core with vector geometry types and operations, and enables developers to build MapReduce applications for spatial data.Spatial Framework for Hadoop: Extends Hive and is based on the Esri Geometry API, to enable Hive Query Language users to leverage a set of analytical functions and geometry types. Getting started How it all works?
Guides, Books & Maps | Northwest Geology Field Trips This page contains links to field guides and geologic maps of Washington and southwest British Columbia. I will periodically update the page with new links and references to other sources. Please submit information about books or online guides you know about. Send links and suggestions to tuckerd@geol.wwu.edu [cut and paste- not a live link]. You may find some of these in public or university libraries; others are available only by purchase. 2009 Haugerud, Ralph A., and Tabor, Rowland W., 2009, Geologic map of the North Cascade Range, Washington: U.S. Geologic map of the North Cascades. 33 x 50 ” paper map. This map is available online. The authors are the leading authorities on North Cascade mapping and geology. 1993 Roadside Geology of Mount St. 2005 Roadside Geology of British Columbia by Bill Mathews and Jim Monger; Mountain Press Publishing (Missoula). Reprinted in 2010, and with a new cover design, this is surely one of the best volumes in the entire Roadside Geology series.
DOGAMI | Lidar Data Viewer - Introduction Interactive map upgrades begin Friday, April 11 The Lidar Data Viewer is undergoing a maintenance update and data layers may not appear. The viewer will return to normal service as soon as possible. Thank you for your patience during these improvements. Until the viewer is back, users can view DOGAMI lidar as a base map option on Oregon HazVu and SLIDO interactive maps. What is the DOGAMI Lidar Data Viewer? This interactive map allows you to view lidar data shaded-relief imagery for Oregon at zoom scales to 1:9,028. Use the "Lidar Quad Search/Purchase" tool on the map to locate and order Lidar Data Quadrangle (LDQ) publications.* Locate LDQs by: Ohio Grid Code USGS topographic quadrangle name *Lidar Data Quadrangles (LDQs) can be purchased through Nature of the Northwest Information Center. What do I need to use the map viewer? To view the map, your browser must have Adobe Flash Player and must allow cookies. Map Tool Help Limitations Additional Resources Lidar Landscapes posters | postcards
Global Network for the Forecasting of Earthquakes The International Geodynamic Monitoring System, a part of GNFE (London, UK), has registered on November 15, 2011 a powerful energy release emanating from the Earth’s core. The intense three-dimensional gravitational anomaly was almost simultaneously recorded by all ATROPATENA geophysical stations separated by vast distances from each other in the following cities: Istanbul (Turkey), Kiev (Ukraine), Baku (Azerbaijan), Islamabad (Pakistan) and Yogyakarta (Indonesia). According to GNFE President Professor ElchinKhalilov, the detailed analysis of ATROPATENA station records indicates a powerful energy release emanating from the Earth’s core. According to the scientist, this fact may herald intensification of geodynamic processes in our planet and as a result, a higher number of strong earthquakes, volcanic eruptions and tsunamis. Meanwhile, 15 November 2011 all ATROPATENA stations registered, almost simultaneously,a very powerful gravitational impulse.
OpenStreetMap US Geologic Map of the Camas Quadrangle, Clark County, Washington, and Multnomah County, Oregon Western Earth Surface Processes U.S. Geological Survey Scientific Investigations Map 3017 By Russell C. Introduction The Camas 7.5' quadrangle is in southwestern Washington and northwestern Oregon approximately 20 km east of Portland. This map is a contribution to a program designed to improve geologic knowledge of the Portland Basin region of the Pacific Northwest urban corridor, the densely populated Cascadia forearc region of western Washington and Oregon. Files for Viewing and Plotting Download this map as a ~43" x ~36" PDF file (camas_map.pdf; 4.5 MB). Download the accompanying pamphlet as a 32-page PDF file (camas_text.pdf; 1.2 MB). Readme Go to the readme folder for any of four file formats (CamasReadme.doc; 52 kB, CamasReadme.html; 144 kB; CamasReadme.pdf; 64 kB, CamasReadme.txt, 16 kB). Data Download the geodatabase data objects (sim3017_db.zip; 14.3 MB compressed, 41.1 MB when opened). Download the shapefile package (sim3017_shp.zip; 5.8 MB compressed, 14.1 MB when opened).
DOGAMI - Lidar Landscapes Posters: Umpqua Lighthouse State Park; Honeyman State Park; Netarts Bay; Willamette River Historic Channels; Big Obsidian Flow, Newberry Crater; Mt. Hood and the Parkdale Lava Flow $10 each, from Nature of the Northwest | 2012 Calendar | Postcards Each artistic rendering was created using a lidar bare-earth raster image draped with an orthophoto. Umpqua Lighthouse State Park, Oregon, 18 x 24 inches, by Daniel Coe, $10. Order poster Honeyman State Park, Oregon, 24 x 18 inches, by Daniel Coe, $10. Order poster Netarts Bay, Oregon, 24 x 18 inches, by Daniel Coe, $10. Willamette River Historic Channels, North of Corvallis, Oregon, 24 x 18 inches, by Daniel Coe, $10. Big Obsidian Flow and Other Major Lava Flows, Newberry Crater, Oregon, 24 x 18 inches, by Daniel Coe, $10. Mount Hood and the Parkdale Lava Flow, Oregon, 24 x 18 inches, by Daniel Coe, $10.
ArcGIS Desktop This topic provides a set of links to a collection of various ArcGIS tutorials used to perform a number of common tasks in ArcGIS. Find the tutorial that you would like to work through by clicking the links in the tables below. To work through the ArcGIS Desktop tutorials, you need to install the tutorial data from the ArcGIS Desktop Tutorial Data setup, which is part of the ArcGIS Desktop installation download or media. If the tutorial data has been installed on your system, look for it in C:\arcgis\ArcTutor (the default installation location). The ArcGIS Server Installation does not include tutorial data. Keep in mind that these tutorials are only a starting point for you to learn about ArcGIS. ArcGIS Desktop application tutorials ArcGIS Desktop extension tutorials ArcGIS Server tutorials
40057 - What is the difference between a shapefile and a layer file? Question What is the difference between a shapefile and a layer file? Answer A shapefile (.shp) is a vector data storage format for storing the location, shape, and attributes of geographic features. A layer file (.lyr) is a file that stores the path to a source dataset and other layer properties, including symbology. In comparison to a shapefile, a layer file is a just a link\reference to actual data, such as a shapefile, feature class, etc. For example, if a layer file is sent to a user on another machine without the data it was created from, it does not display on the map because it does not contain the source data. This is where utilizing layer packages eases the processing of migrating data, because layer packages store both the layer file and source data. Related Information
Maps & Map Postcards Title:Old Man Alaska Alaska (AK), Linen unused Description: Area - 590,000 square miles; coast line - 26,000 miles; discovered by Russia - 1741; bought by US - 1867; Yukon River - 2000 miles; Mt. McKinley - 20,300 feet; purchase price - $7,200,000; est. minerals - $700,500,000; Statistics for Jan. 1937: Fur, Fox, Mink, Etc - $2,513,243; Silver - $217,201; gold - $16,653,379; copper - $2,488,703; salmon - $48,173,176; total fish value - $51,971,206; commerce $115,963,586; reindeer, est. number - 750,000; airplanes - 90; airplane miles - 2,130,929; passengers carried - 16,982 Title:Map of Shenandoah Valley of VirginiaLinen Historical Magnetic Declination | ngdc.noaa.gov Magnetic declination is an important concept for accurate navigation. A compass will always point along the lines of magnetic force (which converge on what are called the magnetic poles). The angle between the direction of force and the direction of the geographic north pole is called the declination. If a compass at your location is pointing to the right of true north, declination is positive or east, and if it points to the left of true north, declination is negative or west. As the earth's magnetic field varies over time, the positions of the north and south magnetic poles gradually change. This map displays historical isogonic lines and magnetic poles calculated for the years 1590-2020. Years 1590-1890: calculated from the gUFM model Years 1900-2020: calculated from the IGRF Years 1890-1900: a smooth transition was imposed between models More information about geomagnetism at NCEI More information about magnetic poles and polar wander at NCEI Instructions for using the map:
Pacific Northwest Geologic Mapping and Urban Hazards Pacific Northwest Urban Corridor Geologic Maps Available 7.5' and 30' x 60' geologic maps Tolan, Terry, Beeson, Marvin, and Wheeler, K.L., 1999, Geologic Map of the Scotts Mills, Silverton, and Stayton Northeast 7.5 Minute Quadrangles, Northwest Oregon: A Digital Database, U.S. Beeson, M.H., Tolan, T.L., and Madin, I.P., 1989, Geologic map of the Lake Oswego quadrangle, Clackamas, Multnomah, and Washington Counties: Oregon Department of Geology and Mineral Industries, Geological Map Series 59, scale 1:24000. Madin, I.P., 1994, Geologic map of the Damascus quadrangle, Clackamas and Multnomah Counties: Oregon Department of Geology and Mineral Industries, Geological Map Series 60, scale 1:24000. Madin, I.P., 1990, Earthquake hazard geology maps of the Portland metropolitan area: Oregon Department of Geology and Mineral Industries, Open-File Report 90-2, scale 1:24000. Geologic maps in preparation Wells, R.E., in preparation, Geologic map of the Newberg 7.5' quadrangle, Oregon, U.S.
USGS Topographic Maps Update 11/28/2011 Seamless Topo Maps - I have released a seamless version (without the map borders) version of the USGS Topographic Map layer for Google Earth. In addition to removing the map borders, hill shading has been added using the 10-meter National Elevation Dataset (NED), which greatly enhances the topography and makes it possible to “see” the 3D effects when using Google Earth in off-line mode. Given the amount of time required to create this layer, and the server resources required, I will be charging a small fee to download the seamless maps. Making the maps available for download allows me to make them available at a higher resolution than I would be able to otherwise. See the Seamless Topographic Maps for Google Earth page for more information. USGS Topographic maps provide detailed information such as land use, feature names, the locations of natural features, and topographic elevation contours. The maps in this collection typically date from around 1978 to 2005.