Sweet! I've been looking at a few places as well and it's very good with minimal real world shift! Very nice imagery in remote areas too!
On Fri, Sep 15, 2017 at 10:15 AM, Bernie Connors <[email protected]> wrote: > James, > > I have not undertaken an overall assessment of the Esri World > Imagery basemap. However, I was responsible for the QC of the most recent, > high resolution, urban aerial photography that was collected in 2015 and > 2016 in several dozen NB communities. This photography was collected by > Pictometry for the provincial government and its primary use is for > property assessment. I have reviewed the reports for the ground control, > aerial triangulation and orthorectification. The province opted to > purchase the AccuPLUS orthophoto product from Pictometry which has a higher > level of human intervention in the selection of the images that are used to > prepare the orthophotos. This results in orthophotos with a minimum of > "building lean". When compared to the provincial GIS datasets available > from GeoNB [1] the alignment was very good. Additionally I have heard from > several municipal GIS managers and they are also very impressed with the > horizontal accuracy of the Pictometry AccuPLUS orthophotos. If I had to > put a number to the horizontal accuracy of the Pictometry orthophotos in NB > I would say it is better than 15 cm. > > The province of New Brunswick participates in Esri Canada's > Community Maps Program. Through this program we contribute GIS data > (orthophotos and vectors) that are used to update the Esri World Imagery > basemap and the Esri World Topographic basemap. Many other communities > across Canada also participate in the program [2]. If these communities > are contributing their municipal orthophotos to the program it is safe to > say that the Esri World Imagery basemap is very accurate within these > communities. > > [1] - GeoNB Data Catalogue - http://www.snb.ca/geonb1/e/DC/catalogue-E.asp > [2] - Esri Canada Community Maps participants - > http://maps.esri.ca/updates/tracking/ > > Bernie. > > On Fri, Sep 15, 2017 at 10:35 AM, James <[email protected]> wrote: > >> How well is the ESRI Imagery aligned with the real world (in General)? >> >> On Fri, Sep 15, 2017 at 9:32 AM, Bernie Connors <[email protected]> >> wrote: >> >>> Hello all, >>> >>> >>> >>> My apologies if this has already been mentioned on this >>> list. The Esri World Imagery basemap is now available as a background >>> image for OpenStreetMap editors. In New Brunswick the provincial >>> government has contributed hundreds of square kilometres of high >>> resolution, urban air photos to the Esri World Imagery basemap. There >>> are thousands of buildings and other features that require editing so they >>> match the newer, hi-resolution imagery in the Esri World Imagery basemap. >>> This area in Fredericton is a good example [1] (start an edit session and >>> choose the Esri World Imagery background). I posted to my blog with a >>> few more details [2] >>> >>> >>> >>> [1] - http://www.openstreetmap.org/#map=19/45.96139/-66.64951 >>> >>> [2] - http://geobern.blogspot.ca/2017/08/esri-world-imagery-in-o >>> penstreetmap.html >>> >>> >>> >>> Bernie. >>> -- >>> Bernie Connors >>> New Maryland, NB >>> >>> _______________________________________________ >>> Talk-ca mailing list >>> [email protected] >>> https://lists.openstreetmap.org/listinfo/talk-ca >>> >>> >> >> >> -- >> 外に遊びに行こう！ >> >> _______________________________________________ >> Talk-ca mailing list >> [email protected] >> https://lists.openstreetmap.org/listinfo/talk-ca >> >> > > > -- > Bernie Connors > New Maryland, NB > -- 外に遊びに行こう！
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