Vermont GIS Data News

April 14, 2017

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2016 4-band Ortho Imagery Now Available for Rutland and Windsor Counties!

The new vintage of digital ortho imagery has a base resolution of .3 meters (previously we collected .5 meter) with higher-resolution .15 meter imagery collected in most downtown and village areas. Check this online map for details on higher resolution areas and also which part of the state will be collected each year. The imagery collected in 2016 for the Rutland/Windsor area is now available for download in .jp2 format as well as via image service. Links to download and rest end point are found at the VT Open Geodata Portal. You can also choose to purchase the All Imagery data product (on external drive) if you would like the uncompressed .tif images.

New Lidar Data for Windham, Chittenden, Washington, Lamoille, and Orleans Counties Available!

Not only is newly collected lidar data for a big portion of the state available for download at the Open Geodata Portal (DEM, DSM, and contours), VCGI’s new lidar DEM and hillshade image services are available for the whole state (minus the eastern central portion of the state along the CT River which was collected in the fall of 2016 and should be available late in 2017). All new available lidar (including point clouds, which are not available for download) and their derivatives, as they become available, can be purchased on a single All Lidar external drive as well.

Updated E911 Data Has Been Posted!

E911 data, including esites, driveways, emergency service zones, and other related layers have been updated and posted for download at the VT Open Geodata Portal. More information about what has been posted can be found at the VCGI web site.


VT Open Geodata Portal Replaces VT GIS Data Warehouse!

January 4, 2017

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The VT Center for Geographic Information (VCGI) is pleased to announce the release of a new Vermont Open Geodata Portal (geodata.vermont.gov). VCGI, in close collaboration with Vermont’s Enterprise Geospatial Consortium (EGC), has built a website (Portal) that helps constituents find, explore, and access a wealth of geospatial resources. The Portal provides access to geodata, web services, and applications originating from many sources (publishers) including numerous State agencies (e.g. VT Agency of Natural Resources, VT Agency of Transportation, VT Agency of Human Services, VT E911).

Highlights:

  • Download formats – Vector datasets are available in multiple download formats (shapefile, excel, and csv).
  • Smart search – All entries are fully indexed with tags and keywords making it easier to find what you’re looking for.
  • Data visualization – Vector datasets can be visualized using the built-in map viewer. Users can even filter the data before they download it!
  • Big Data download tools – The Portal includes special tools for “big” datasets such as imagery and lidar. These include the Tiled Data Download Tool and Clip & Zip Tool.
  • Modern web platform – The Portal leverages modern web technology supported by Esri (Environmental System Research Institute, Inc.), providing the State with an upgrade path for the future.

VCGI would like to thank our State Agency partners for their ongoing dedication to improving access to Vermont’s geospatial resources!


VCGI Early Winter News

December 19, 2016

geodata1Parcel Data Posted: 39 towns (6 newcomers!) – details here: http://vcgi.vermont.gov/parcels/update_2016A

New Open Geodata Portal Beta Posted: Different CMS, totally different look, still time to provide your feedback via the survey!

Link to BETA 3.0: http://geodata1.vcgi.opendata.arcgis.com/

What do you think?  Check out the site then please filling out this short survey https://www.surveymonkey.com/r/TW92TC6 . The BETA 3.0 site will be available until 5PM 12/21/2016 (Wednesday) so don’t delay!

2017 Intro GIS Training Dates Set: Check the VCGI Trainings Web Page for more details about the trainings that will be offered in partnership with VT Technical College:


Public BETA Release – VT Open Geodata Portal!

November 3, 2016

The VT Center for Geographic Information (VCGI) is pleased to release a BETA version of Vermont’s new Open Geodata Portal!

http://geodata.vermont.gov

VCGI and its partners have built a website that connects publishers and consumers and helps them find, explore, contribute, and use geospatial information and resources. The VT Open Geodata Portal (Beta) “federates” geodata, web services, and geospatial applications from many sources (publishers) including several State agencies (e.g. VT Agency of Natural Resources, VT Agency of Transportation, and VT Agency of Human Services).  VCGI would like to thank our partners for their dedication to improving access to Vermont’s geospatial assets.

What do you think?  Please take a few minutes to explore the BETA site (http://geodata.vermont.gov), kick the tires, and let us know what you think (http://geodata.vermont.gov/beta_survey).  Your input will help us improve the website.  We plan to release a final version by the end of the year.  Thanks!

P.S. Known “bugs/limitations” have been documented here (http://geodata.vermont.gov/beta1_bugs).

 


VT LiDAR Data Upgrade & New Data!

July 18, 2016

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New LiDAR Data Available:

1.     2013 Rutland/Grand Isle data “collection” which includes the Mad River Valley (see map here):  0.7m resolution, Quality Level 2 (QL2). – DEM has been posted, Hillshade and Contours are coming soon.

2.     A pre-release portion of the 0.7m Quality Level 2 (QL2) 2014 “Eastern VT” data “collection” which includes a portion of Georgia and stretches south along the lake into Charlotte in Chittenden County (see map here). – DEM and Hillshade have been posted, Contours are coming soon.

Visit VCGI’s Open Data page and search via keyword “lidar” to see the list of new and updated data:  http://vcgi.vermont.gov/opendata

Changes to Existing Data:

NOTE: some of the data identified below did NOT make it through the posting process. We are working through some technical issues and hope to resolve them in the next couple of weeks.

1.     Updated naming convention to all LiDAR related data. E.g., “Elevation_DEM1m1020_2005.img” is now “Elevation_DEM1M2005_1020.img”.

a.     Digital Elevation Model (DEM) data now reflects its “hydro treatment”, e.g., DEM = “pure” DEM; DEMHF = “Hydro-flattened” DEM; DEMHE = “Hydro-enforced” DEM; see USGS’s “Hydro Treatments of LiDAR Derived DEMs” powerpoint for details.

2.     All downloadable data layers are in their original, vendor-delivered tiling structure, re-projected to VT State Plane Coordinate System NAD83 meters, Zunits meters and the Erdas Imagine format. This primarily affected the following collections:

a.     2008 “Lower” Missisquoi – Reimported to original 1.6m, “hydro-flattened” DEM format;

b.     2010 “Upper” Missisquoi (a.k.a. “Rock River”) – Reimported to original 1.6m, “hydro-flattened” DEM format;

c.      2012 Bennington County – Reimported to original 2m, “pure” DEM format;

3.     Only DEMs and contours (DEM/DEMHE/DEMHF) are provided in tiled format. Other derivatives are in single mosaic file format only.

a.     When contour data was part of the original vendor delivery they are in the same tile index structure as the DEMs.

b.     When contour data was not part of the original vendor delivery and created by VCGI in 2013/2014 they are in the “Ortho9” tile index.

4.     All primary (DEMs) and secondary derivatives (ASPECT, DSM, HILSHD, nDSM & SLOPE) are available in a single, mosaic file format covering the full “collection” extent.

Changes to Metadata:

  • All LiDAR metadata files have been updated to latest EGC format (May 2016).
  • For original vendor metadata see “All VT LiDAR on an External drive” main page for all project level metadata in a central location (these are original vendor metadata for LAS data).

VCGI Update: FEMA DFIRM and Southern Orthos

February 16, 2016

State-Wide FEMA DFIRM Data Posted

A state-wide FEMA DFIRM data set (where DFIRM is available – see map) has been posted in Vermont’s Open GeoData Portal: http://vcgi.vermont.gov/opendata.  This new data posting replaces the individual county-based and town-based DFIRM data sets that were previously posted to the portal.  This new data set is catalogued in the portal with the database name EmergencyFlood_DFIRM;  It can be found by searching with the keyword “DFIRM”.

The DFIRM data set is available through the portal as a .zip package that contains shapefiles, tables, metadata files, and a .lyr file.

VCGI appreciates VT Agency of Natural Resources (ANR) staff for keeping VCGI abreast of the status of DFIRM data and providing symbology that is incorporated into the .lyr file.

NOTE:  New flood maps in Bennington County just became effective on 12/2/2015.

NOTE:  See the Flood Ready Vermont web site at http://floodready.vermont.gov/ for information on flood readiness.

 

All VT Imagery Service Now Includes 2015!

VCGI’s full suite of imagery services have been updated with the latest 2015 VT ortho imagery (covering southern VT).

2015 Orthos have been integrated into the following services

  • All “Best of” services + caches (color, color infrared, and black & white) have been updated
  • All statewide “ortho only” services (color, color infrared, and black & white) have been updated
  • Individual cached 2015 ortho services have been created (SP + WM)
  • The “All VT Imagery and Indexes” service (version 3) has been updated to include 2015 imagery + indexes (including tie-cut lines).

NOTE: These services also take advantage of stable “layer ids” for those hackers out there, so you can count on them staying the same when you write your code.

Additional details are available here:

http://vcgi.vermont.gov/warehouse/web_services#imagery

 


Ortho RFP Q&A Posted

December 17, 2015

Leslie Pelch, VCGI

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Vermont’s Orthophoto Collection RFP Question period has passed and the questions and their answers have been posted! Check them out, along with relevant suporting documents, here: http://vcgi.vermont.gov/rfps