Ortho RFP Q&A Posted

December 17, 2015

Leslie Pelch, VCGI

statehouse_0_3_2013_sm

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


VCGI Update

December 9, 2015

Leslie Pelch, VCGI

vt_gis_report_2015

1. Updated “About VCGI” Page Includes State GIS Report (FY 2015) and Interim Strategic Plan: http://vcgi.vermont.gov/about_us

2. 2015 Orthos Available as a Product
For your convenience…

You can now purchase all of the imagery collected during the 2015 Orthophoto collection on an external drive:

Southern VT – Windham and Bennington Counties
.5 meter pixel, 4-band color and black and white

You can still download individual images here: http://vcgi.vermont.gov/warehouse/imagery, and the imagery will be available as a service and via custom download soon (all for free), but if having all of the imagery mailed to you on an external drive would make your life/work easier…click here to go to the products page to order the drive for only $100: http://vcgi.vermont.gov/warehouse/products

 

 


Humanitarian OpenStreetMap Team – Nepal, Mexico and Afghanistan

December 3, 2015

From Noah Ahles at the UVM Spatial Analysis Lab

Gulmi_Nepal_mapathon

Imagery of Kathmandu, Nepal provided by Bing

The last week in October was exceptionally busy for members of the Humanitarian OpenStreetMap Team at UVM. On October 25th the Spatial Analysis Lab hosted a mapathon to create detailed digital maps in Nepal in response to a massive landslide that blocked the Kali Gandaki River. Coincidentally, hurricane Patricia had just hit Mexico’s western coast and we were able to delegate a team of volunteers from Tri Delta to work in Puerto Vallarta. Thankfully, Mexico was well prepared and there was a minimal loss of life, although there was severe damage to infrastructure as a result of flooding and winds. Despite breaking records for highest sustained wind speeds globally and barometric pressure in the Western Hemisphere, Patricia quickly dissipated once it made landfall after hitting a steep gradient of elevation into a mountainous region.

Read more here: http://letters-sal.blogspot.com/2015/12/humanitarian-openstreetmap-team-nepal.html


Mapping Winooski River ice conditions in Montpelier

April 8, 2015

This is from the UVM Spatial Analyis Lab Blog, click below for the full post and other related posts!

30March2015

This is a follow-up to our previous post on using high-spatial, high-temporal resolution imagery from our senseFly eBee to map changing ice conditions on Vermont Rivers. The Winooski River in Montpelier has a history of ice jams and flooding. As part of our Department of Transportation grant we have been gathering color-infrared imagery of the Winooski River to evaluate the use of such imagery to map changes in ice conditions.

Click here to read the rest of this post!


VT Mapping News: RFP for Parcel Mapping Posted, Bridge and Culvert Data Videos Posted!

January 14, 2015

grantees_2014_2015RFP for Parcel Mapping Posted: 

Lemington today, Brunswick, Stannard, and Sutton coming soon…

I am excited to report that I have posted the first of (at least) 4 parcel mapping RFPs that will be made available in the next month or so: Lemington, VT!

http://vcgi.vermont.gov/about_us/projects/nvpdp

The link for the RFP is near the bottom of the page, but feel free to check the other information about this funded project (which will be done at the end of this year).

youtube_vtransVTrans Youtube Videos of Bridge and Culvert Data Workshop:

In October 2014, the Vermont Agency of Transportation (VTrans) hosted a workshop to help GIS users of Vermont data understand what bridge and culvert information is available, and which data set is appropriate for their needs.

A series of videos of the information presented at the workshop have been produced by Eric Goldman, Multimedia Specialist, and Sara Moulton, GIS Specialist of the VTrans Division of Policy, Planning and Intermodal Development. The videos can be accessed on YouTube at


Webinars Scheduled, LiDAR Information, Parcels Service Updated

October 1, 2014

LiDAR_Status_2014_250dpi_092914

by Leslie Pelch, VCGI

Parcels: the parcels web map service has been updated to reflect additional or updated parcel data (also available for download)

LiDAR:

  • In addition to completing the Rutland County collection (orange in map above), the entire Winooski River Watershed plus some additional area will be collected in 2014 or 2015. The project will cover more than 2400 square miles (light green in map above), complete Lake Champlain Basin coverage on the Vermont side and include a new coverage for Chittenden County. Total project funding was $880,000 and a total of six cooperators contributed to the project.
  • A pilot area Web Map Service of LiDAR data will be available soon!
  • Updated ArcGIS Online VT LiDAR map makes finding information about available LiDAR and derivatives easier: http://vcgi.vermont.gov/LiDAR

Fall Webinar Series Scheduled (all will be recorded and posted at VCGI’s Youtube channel):


Vermont LiDAR Update – Summer 2014

July 3, 2014

Rutlandstatus

Mike Brouillette, VCGI

2-Foot Contours Almost Done: After engaging in a lot more troubleshooting/programming than I had originally expected, I am now confidently coasting toward processing the final (and fully tested!) Essex Data extent over the 4th of July long weekend. Essex was the toughest of them all and will require about 4 days to process. Next week it’ll be in the Database Administrators hands and I will ply him with coffee to get all 2’ contours from the major project areas posted as early as possible. I will forward an update at that time. This will complete “Phase I” as noted below and permit me to begin working on the smaller, existing data extents in “Phase III” while simultaneously working with the DBA on “Phase II”.

New LiDAR? The 2014 Spring data acquisition effort for the Grand Isle/Rutland County/Little & Mad river watersheds Area of Interest (AOI) sadly did not get completed due to the trifecta of late snow cover, followed by long periods of rainy/cloudy weather and topped off by a quick warm spell that propelled leaf-out a week ahead of “normal” (whatever that is). The photo above shows in light pink and yellow what was collected (Champlain Islands and Eastern Waterbury). The remainder (Mad River and Otter Creek areas) will be flown this fall.

Plans to Collect Even More Data? Efforts are underway to pursue the next data acquisition for spring 2015 (very small possibility it may be fall 2014 but don’t count on it), and it includes 1,746 square miles of Chittenden County and the final outstanding subbasin areas for the Vermont side of Lake Champlain. Subject to funding, more areas may be added but would be based on the funding sources priorities.

Thank you for all your feedback and constructive criticisms on various inconsistencies on the LiDAR web page and related documents. This helps me continually refine the information to the benefits all LiDAR data users – keep it coming.

What Has Come Before and The Plan for the Future:

Just a reminder that VCGI released the following LiDAR-based, “secondary” derivatives in May, i.e., ASPECT, HILSHD, nDSM and SLOPE data. These data were derived from the Addison, Bennington and Essex Counties and the Missisquoi Subbasin projects.

Definitions:

ASPECT:  Cardinal direction of slope from 0 to 360 degrees (East = 90, South = 180, West = 270 etc.)

HILSHD (Hillshade):  Models illumination of a surface from a light source at an azimuth of 315º and an altitude of 45º

nDSM:  “Normalized Digital Surface Model.”  DEM subtracted from the DSM – each pixel represents the height above ground, not above sea level.

SLOPE:  Change in elevation over the distance between the cell and its eight neighbors expressed in percent slope or percent grade, i.e., rise/run * 100.

The Plan:

To put this release into perspective of the overall VT LiDAR Initiative and its data related goals, a very brief overview of our approach to date follows. The fact that only 3 of the 8 steps are mostly complete belies the fact that Phase I involved a high level of effort in establishing protocols, guidelines and technical approaches that extend to subsequent phases.

PHASE I: (Includes 2012 Addison, 2012 Bennington and 2005 Essex Counties and the 2008/2010 Missisquoi Subbasin projects). These cover ~ 30% of the state.

1)      COMPLETE:                 Make “primary derivative” LiDAR data available on the VGIS, i.e., DEM and DSM, for the largest projects;

2)      COMPLETE:                 Make “secondary derivative” LiDAR data available on the VGIS, i.e., ASPECT, HILSHD, Ndsm and SLOPE for the largest projects;

3)      IN PROCESS (95%):  Integrate vendor provided 2’ contours, generate 2’ contours where needed to update the existing “ElevationContour_CN2T” data layer and make data available on the VGIS.

PHASE II: (Includes 2012 Addison, 2012 Bennington and 2005 Essex Counties and the 2008/2010 Missisquoi Subbasin projects). These cover ~ 30% of the state.

1)      IN PROCESS (25% JULY):  Process prototype of Contour, DEM and DSM data into feature and image services, respectively and make available on the VGIS.

2)      PLANNED (JULY/AUGUST):  Process all Phase I AOI’s to put Contour, DEM and DSM data into feature and image services, respectively and make available on the VGIS.

PHASE III: (Includes 2007 Bennington, Chittenden, Rutland & Washington flood plains, 2009 Barre-Montpelier, 2010 Bennington flood plains and 2012 VTrans-TSIrene projects). These cover ~6.8% of the state but not exclusive of larger projects, e.g., 2012 Bennington County vs. 2007 & 2010 Bennington floodplains.

1)      PLANNED (JULY/AUGUST):            Make “primary derivative” LiDAR data available on the VGIS, i.e., DEM and DSM, for the largest projects;

2)      PLANNED (AUGUST/SEPT) :                      Make “secondary derivative” LiDAR data available on the VGIS, i.e., ASPECT, HILSHD, Ndsm and SLOPE for the largest projects;

3)      PLANNED (SEPT/OCT):           Integrate vendor provided 2’ contours, generate 2’ contours where needed to update the existing “ElevationContour_CN2T” data layer and make data available on the VGIS.

PHASE IV: (Includes 2007 Bennington, Chittenden, Rutland & Washington flood plains, 2009 Barre-Montpelier, 2010 Bennington flood plains and 2012 VTrans-TSIrene projects). These cover ~6.8% of the state but not exclusive of larger projects, e.g., 2012 Bennington County vs. 2007 & 2010 Bennington floodplains.

1)      PLANNED (SEPT/OCT):            Process Contour, DEM and DSM data into feature and image services, respectively and data available on the VGIS.

 

Please refer to vcgi.vermont.gov/lidar for information about the VT LiDAR Initiative, LiDAR related data and resources, or contact me with questions: mikeb@vcgi.org or 802-882-3008.

 


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