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Posts Tagged ‘Maryland’

The Coastal Atlas from the Maryland Department of Natural Resources

February 5, 2018 Leave a comment

The Maryland Coastal Atlas serves up ocean use and resource data, coastal hazard and shoreline data, and near-shore and estuarine data.  The purpose of the atlas is to make coastal related geospatial datasets available to agencies, researchers, and the general public for viewing and for performing basic overlays.  Tools are being added to make the atlas more versatile for users to do analysis and to help simplify or select data important for different users’ needs. The list of layers is extensive; at least 100 items are included.  But equally impressive is its ability to add dozens more layers from the MDiMapD database on such themes as agriculture, housing, demographics, hydrology, and much more.

The Atlas uses the Esri Web App Builder for its interactive map capabilities.  One of my favorite things about the atlas is the user’s ability to add data to the web interface from ArcGIS Online, a URL, or a file of the user’s own creation.  The site features unexpected helpful touches such as palette of drawing tools that makes the atlas a rich teaching tool, and transects that can be drawn in the map to analyze such things as erosion rates.

A few enhancements on the site could be done to make it more useful, such as an expansion of the fairly limited query tool and an explanation of how it can be used.  I was puzzled how to close the transect results once I had created one, but this and other user interface questions were small; overall, the interface was intuitive.  The Maryland Coastal Atlas provides an excellent addition to the other portals we have written about in this region, such as the Maryland iMap Data Catalog We wrote about the state of Maryland’s GIS portal in the past, and the selected other data portals for the Chesapeake Bay.

The atlas uses the map services available from the Maryland GIS Portal and the iMap Open Data Catalog that we reviewed above.  To obtain the data, go to the Maryland Data Catalog to download the data or get the API to use in an online mapping application.  All of the Maryland Coastal Hazard datasets on the atlas are available through the data catalog but not all are downloadable.  Here is an example of a dataset on the atlas shown in the iMap Data Catalog with the Download and API function available on the listing.  Every layer is a REST service hosted by Maryland iMap, managed by the Geographical Information Office (GIO) and the state IT group (DOIT).

mdcoastal

The Coastal Atlas from the Maryland Department of Natural Resources.

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Data Portals for the Chesapeake Bay reviewed

July 17, 2017 3 comments

The Chesapeake Bay, situated along the east coast of the United States, in part because it has long been a focus for environmental restoration, is also a rich source of geospatial data. One primary source is the Virginia Institute on Marine Science, which maintains a Submerged Aquatic Vegetation (SAV) resource.  It also includes an interactive GIS map.  The SAV maps and vegetation data contain information dating all the way back to 1971.

The reasons why VIMS maps the SAV is because this vegetation is one of the best barometers of the water quality; its beds filter polluted runoff, provide food for waterfowl, and provide habitat for blue crabs, juvenile rockfish (striped bass), and other aquatic species; the beds are associated with clear water, and their presence helps improve water quality.  Even if you are not interested in analyzing the vegetation per se, the site is an excellent resource for data and imagery on the Chesapeake Bay.

Some of my other recommended data sites in the region include the Chesapeake Bay Data Hub, the Maryland Open Map portal, (which we reviewed here), the Susquehanna River Basin Commission, Virginia’s open data portal, other Virginia portals, and the USGS’ Chesapeake Bay’s site.  Try these resources and we look forward to your comments below.

savmap

Portion of submerged aquatic vegetation imagery and mapped data from the Virginia Institute of Marine Science.

Maryland’s Mapping and GIS Data Portal

September 29, 2014 3 comments

Maryland’s mapping and GIS “iMap” data portal takes an innovative approach to serving data.  It allows the user to zoom to a specific area on the map and then conduct a data search for that specific area.  Yes, other sites have done this for years, but the Maryland data portal uses a dynamic ArcGIS Online map to launch searches.  In addition, the 20 data categories listed–from agriculture to demographics, health to imagery, structures to weather–are rich in content, and the data user is offered numerous data formats to receive the data.  The site also goes the extra distance by providing step-by-step instructions on how to add web and WFS services, how to geocode, how to join data, and how to cartographically display results.

The GIS data portal is run by the Geographic Information Office (GIO), and by collaborating with partners, it seeks to “provide access to a large collection of data via the Maryland iMap that can be leveraged for use in many applications and analyses.”  The GIS data portal is a part of the state’s open data portal, which claims to be #1 in the USA for its commitment to open data.

We are honest in our book and in this blog about describing data portals that seem to be there “just for show” and that had no input from GIS professional staff.  The Maryland iMap portal, by contrast, is quite innovative, extensive, and GIS-user friendly, and seems to be a good model for other organizations to follow.  Such portals do not appear overnight, and this is obviously the product of a good deal of collaboration among government, private, academic, and nonprofit organizations,

Maryland's iMap Mapping and GIS Data Portal

Maryland’s iMap Mapping and GIS Data Portal.