The National Map

Diseño cartográfico | Ecoter SC - Ecología y Territorio Como dice Wikipedia, la cartografía es la ciencia encargada del estudio y elaboración de mapas. Los mapas, por su parte, son una representación generalizada y precisa de fenómenos localizables en el espacio. Desde nuestro punto de vista, la elaboración de mapas es una ciencia que incluye a partes iguales, técnica, análisis y diseño. Los mapas son documentos importantes y de gran relevancia para la toma de decisiones territoriales y un instrumento de gestión necesario en la sociedad actual, independientemente de su formato. Por ello, a la hora de elaborar un mapa hemos de tener muy claros los objetivos de su realización, el propósito de su representación y a quién va dirigido. El conocimiento de los SIG, el buen gusto y el correcto uso de las variables cartográficas nos permitirá conseguir que nuestro mapa sea un documento válido. Dejemos de ser sólo analistas SIG y convirtámonos también en Cartógrafos. Color Use gudelines: Esquemas de color, tipos y combinaciones en nuestra leyenda.

National Atlas home page The National Map is now offering a collection of small-scale datasets that can be downloaded for free. Although the 1997-2014 Edition of the National Atlas of the United States was retired in September 2014, The National Map recognizes the importance of continuing to make a collection of the small-scale datasets, originally developed for the National Atlas, available to users. Small-scale maps have an advantage over large-scale maps when there is a need to show a large area in a single view. This makes small-scale maps an ideal solution for scientists, decision-makers, and planners needing to provide a geographical context for the research projects. The National Map collection of 197 small-scale datasets can be downloaded at small-scale data download page . Even though the 1997-2014 Edition of the National Atlas has retired, nationalmap.gov will continue to offer the Set of Dynamic Topographic Maps Illustrating Physical Features.

How streamflow is measured: USGS Water Science The USGS Water Science School A Beta version of the new USGS website has been released for public comment.Use the "Feedback" button at bottom of every Beta page to tell us what you think. Printer-friendly version of this complete article (PDF). If you're a teenager, I imagine your favorite activity is to sit with your parents on a quiet river bank, drink your glass of lemonade, and ponder the complexities of life. Probably the first question you ask is "How much water is flowing in this river?" Often during a large rainstorm you can hear an announcement on the radio like "Peachtree Creek is expected to crest later today at 14.5 feet." Stream stage (also called stage or gage height) is the height of the water surface, in feet, above an established altitude where the stage is zero. Introduction to USGS Streamgaging The U.S. Streamgaging generally involves 3 steps. Streamflow summary Sources and more information Related topics: The water cycle: Streamflow

GIS Data Oregon/Washington BLM The Bureau of Land Management's Oregon/Washington (OR/WA) Data Library contains the spatial data of the Oregon and Washington BLM. The Data Library allows the user to obtain datasets and metadata via download. Please note that the available data in the link below does not represent the BLM's entire OR/WA Data Library. The GIS data of the BLM in OR/WA consist of 1) statewide or regional data captured at a scale of 1:100,000 (or smaller) and 2) Framework, or base, data captured at the 1:24,000 scale (or larger) that have been built and maintained by OR/WA BLM 3) Data cover mostly BLM-managed lands with some private lands included. Spatial data is provided in ESRI ArcGIS 10.1 File GeoDatabase format, which is available for download as a compressed WinZip file. DRG data is provided in MrSID format, unless otherwise noted, and is available for download as a compressed WinZip file. If you are having problems connecting to the server, please enable the Passive FTP in your client or browser.

SIGdeletras: Cartotecas Como ya comenté en una entrada pasada, el próximo día 12 de Julio tendré la oportunidad de participar en Carmona en el curso “Patrimonio Histórico: recursos en Internet” organizado por la Universidad Pablo de Olavide @olavidecarmona Estoy preparando la documentación para el curso y uno de los apartados en los que centraré mi charla-taller es en la identificación y uso de recursos digitales y páginas web que ofrecen al usuario cartografía histórica en formato digital. La cartografía histórica como elemento patrimonial puede ser como tal un objeto de estudio. Es también una fuente relevante de información para investigaciones históricas o/y geográficas donde la variable espacial tenga un papel relevante. A pesar de esto, y espero que gracias a vuestras aportaciones, creo que podría enriquecer bastante la experiencia de los alumnos con otros ejemplos locales, autonómicos o internacionales, con independencia de su escala. Antes de nada...

BGN: Domestic Names - Main The Geographic Names Information System (GNIS) is the Federal and national standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS in support of the U.S. The GNIS contains information about physical and cultural geographic features of all types in the United States, associated areas, and Antarctica, current and historical, but not including roads and highways. The database assigns a unique, permanent feature identifier, the Feature ID, as the only standard Federal key for accessing, integrating, or reconciling feature data from multiple data sets.

Andrews Experimental Forest LTER: Andrews Experimental Forest The Andrews Forest is a place of inquiry. Our mission is to support research on forests, streams, and watersheds, and to foster strong collaboration among ecosystem science, education, natural resource management, and the humanities. Our place and our work are administered cooperatively by the USDA Forest Service's Pacific Northwest Research Station, Oregon State University, and the Willamette National Forest. First established in 1948 as an US Forest Service Experimental Forest, the H.J.

Projections and Distortion in the News A colleague today brought in a newspaper clipping from the weekend edition of the Wall Street Journal for 13-14 April, 2013. It was a map depicting the extimated range of North Korea’s Musudan missile. A couple of things were immediately interesting about this. First, the buffered area did not appear to actually be circular. Working with GIS, I am well aware projections will make us all SADD. The odd position of Alaska could be accounted for if the analyst used a local projection, one centered on Korea. When my colleague brought this to my attention a few minutes ago, he simply asked, “Does this seem right to you?” The slight elongation of the shape toward the north indicates a local projection was used. Next, we grabbed a country feature class from ArcGIS Online so we could not just buffer a point, but the whole country of North Korea. Before running the buffer tool, we also first made sure the country feature class had a geographic coordinate system.

North American Environmental Atlas: <em>North American Environmental Atlas</em> North American Environmental Atlas All over the North American continent, natural and human-caused events are altering land cover – whether from insect infestations, forest fires or urban sprawl. Some of these changes are visible from space and, in collaboration with Canada, Mexico and the US, the CEC released a new set of maps depicting land cover changes in North America’s forests, prairies, deserts and cities, using satellite images from 2005 and 2010. Maps Without Borders The North American Environmental Atlas is an interactive mapping tool to research, analyze and manage environmental issues in Canada, United States and Mexico. Maps are downloadable free of charge and available in an easy to use map viewer format. The CEC uses maps in the Atlas to: Identify priority areas to conserve biodiversityTrack cross-border transfers of pollutantsMonitor CO2 emissions across major transportation routesPredict the spread of invasive species

Derek Watkins Geography at PSU PSU Geography ArcGIS Server To add the server to ArcMap or ArcCatalog, do the followings: 1. Start ArcMap (or ArcCatalog) 2. In ArcMap, click on the Add Data tool to open the Add Data dialog window. 3. 4. 5. 6. 7. Report any problem to jduh@pdx.edu. Map design: a list of helpful online resources Whether they’ve been making maps for 20 years or two weeks, just like any designer, cartographers need inspiration when starting their latest project. Inspiration can come from many places and take many forms. Here at Ordnance Survey we use a range of resources and we want to share some of them with you. In this post we list several online resources that can help with your latest map design; from choosing the right colour palette to selecting great fonts. Although by no means a definitive list, these are some of the tools and resources that we refer to and use regularly and we have sorted them into four categories: colours, fonts, symbols and map inspiration: Colours The use of colour is very often fundamental to the success of a map. ColorBrewer 2.0 is a great tool for selecting colour schemes that are specific to maps, especially helpful when mapping various classes of data. Raphaeljs.com/picker is a nice, easy-to-use colour picker that returns a hex code. Fonts 1001 Free Fonts Dafont.com

La medida de la Latitud y la Longitud Hola a todos, Después de dos meses sin actualizar el blog os traigo una nueva entrada sobre un tema clave de la Ingeniería Cartográfica que es importante para entender la navegación moderna: como se calcula la latitud y la longitud. Líneas de paralelos y meridianos en un mapa con la proyección Mercator. Está claro que el canevás de meridianos y paralelos que vemos en los mapas nos sirven para poder situarnos sobre cualquier punto de la superficie terrestre. Determinación de la latitud La determinación de la latitud era algo ya sabido en la antigüedad, pues conforme nos movemos hacia el Norte o hacia el Sur cambian las estrellas que vemos y su altura sobre el horizonte. Latitud: gráfico esquemático. De ahí que el primer procedimiento para obtener la latitud fuese medir la altura de la estrella Polar sobre el horizonte. Constelación de la Osa Menor, a la cual pertenecen la Estrella Polar y Kochab. Cruz del Sur marcado en un recuadro amarillo (Fuente: WikiMedia) Determinación de la longitud