NYS GIS Servers & ArcPro
Steven DiFalco
Steven DiFalco (he/him)
Land Project Coordinator
Westchester Land Trust
403 Harris Road, Bedford Hills, NY 10507
Facebook
& Instagram: @WestchesterLandTrust
Twitter:
@WLT_NY
Neil Curri
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David Richardson
As Neil stated, the “latest” will always have the latest NYS orthos that are available being made visible.
The 2021 ortho imagery will cover the Hudson Valley (Westchester to Saratoga, plus four western NY ones) with either 12-inch 4-band imagery or 6-inch 4-band imagery for 5 of the 14 counties who chipped in to upgrade the resolution (Westchester, Rockland, Ulster, Green, and eastern Albany).
NY collects its air imagery under leaf-off and snow-free conditions, which can be challenging and short windows of opportunity in some years and force some flights planned for the spring to be delayed until fall instead. As of March 2021, the NYS GIS Program Office expected counties in western NY plus Rockland and Westchester to become snow-free earliest, and so probably flown earlier in the flight season, whereas there was well above average snowpack in the Catskills which could delay flights there. Draft flight plans were being reviewed in March.
But it always takes time to fly and then process and QAQC the imagery; typically what is flown in the spring is in review by the fall and released before the end of the year, while fall flights don’t become available until the next calendar year.
When the data is released, the “latest” webservice has the new orthos in it almost right away (it usually gets shipped to counties just ahead of when it is made available for download and incorporated into the webservices).
-Dave
P.S. as an aside, but maybe of interest to other land trust members in this chapter, does anyone else find the restrictions placed on remotely sensed monitoring of preserves, fee lands, and easements when conducting mandated annual monitoring for Land Trust Alliance (LTA) accreditation to be unnecessarily strict regarding when the imagery was collected (only during the current calendar year)? While I understand the intent, it rules out using lots of state-collected ortho imagery by virtual of choosing “current calendar year” instead of, say, collected within 12 months of the time your review said imagery and write up your monitoring report(s)!
Not that we don’t do field inspections for annual monitoring at most all of our preserves at TNC in NY, but we have some remote and large acreage preserves and easements in the Adirondacks and Tug Hill where we’ve explored supplementing field work with remote sensing in an official way, but that “current calendar year” requirement always throws a wrench into being able to use and include perfectly good imagery from government collection campaigns (which also happen to largely be the only free sources, an important consideration for many non-profits).
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Steven DiFalco
Thank you Neil and David for the information. I’m glad it will update automatically. I do like having the option to switch between the different years on this layer. Using the basemaps in Arc was getting tiresome, especially with Putnam having leaf-on and Westchester leaf-off.
Great update on the imagery, David! Looking forward to having that available also.
Re: your question on restrictions of calendar year data. It’s not free, but we used Near Map for the first time last year and had great success using it. Our area is covered one-three times a year so we’re able to satisfy that requirement. Although in our service area, things change quickly so a photo from March may not be very useful always in August depending on when flights occur. Nothing can really quite capture everything but it did a good job for our need. We have a much smaller service territory than TNC so the cost is kept much lower for us accessing that data. There is also an integration with Arc with NearMap also, but we have data usage restrictions so we often only download what is needed.
Thanks again!
Steven
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Steven DiFalco (he/him) Facebook &
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Neil Curri
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