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created Oct 04, 2012

updated Nov 26, 2012

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Description

This map and corresponding dataset provide the location, satellite images and square footage of existing green roofs within the City of Chicago. This dataset is in KML format. To view or use these files, special GIS software such as Google Earth is required. This information is derived from an analysis of high-spatial resolution (50cm), pan-sharpened, ortho-rectified, 8-band multi-spectral satellite images collected by Digital Globe’s Worldview-2 satellite. The City supplied the consultant with a 2009 City boundary shapefile to determine the required extent of the imagery. Acquisition of three different strips of imagery corresponding to the satellite’s paths was required. These strips of imagery spanned three consecutive months and were collected in August 2010 (90% coverage), September 2010 (5% coverage) and October 2010 (5% coverage). The results of the analysis include overall count of vegetated roofs, their total square footage, and the ratio of required to elective vegetated roofs. A total of 359 vegetated roofs were identified within the City of Chicago. The total square footage of these vegetated roofs was calculated to be approximately 5,469,463 square feet. The ratio of required vegetated roofs to elective vegetative roofs was 297:62 (~5:1). The median size of the vegetated roofs was calculated to be 5,234 square feet.

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Visits
322
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Category
Environment & Sustainable Development
Permissions
Public
Tags
kml, sustainability
Licensing and Attribution
Data Provided By
City of Chicago
Source Link
http://www.cityofchicago.org
Metadata
Data Owner
Housing and Economic Development
Time Period
Fall 2010
Frequency
To be determined.
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cocadmin cocadmin

created Oct 04, 2012

updated Nov 26, 2012

Description

This map and corresponding dataset provide the location, satellite images and square footage of existing green roofs within the City of Chicago. This dataset is in KML format. To view or use these files, special GIS software such as Google Earth is required. This information is derived from an analysis of high-spatial resolution (50cm), pan-sharpened, ortho-rectified, 8-band multi-spectral satellite images collected by Digital Globe’s Worldview-2 satellite. The City supplied the consultant with a 2009 City boundary shapefile to determine the required extent of the imagery. Acquisition of three different strips of imagery corresponding to the satellite’s paths was required. These strips of imagery spanned three consecutive months and were collected in August 2010 (90% coverage), September 2010 (5% coverage) and October 2010 (5% coverage). The results of the analysis include overall count of vegetated roofs, their total square footage, and the ratio of required to elective vegetated roofs. A total of 359 vegetated roofs were identified within the City of Chicago. The total square footage of these vegetated roofs was calculated to be approximately 5,469,463 square feet. The ratio of required vegetated roofs to elective vegetative roofs was 297:62 (~5:1). The median size of the vegetated roofs was calculated to be 5,234 square feet.

Activity
Community Rating
Current value: 0.0 out of 5
Your Rating
Current value: out of 5
Raters
0
Visits
322
Downloads
244
Comments
0
Contributors
0
Meta
Category
Environment & Sustainable Development
Permissions
Public
Tags
kml, sustainability
Licensing and Attribution
Data Provided By
City of Chicago
Source Link
http://www.cityofchicago.org
Metadata
Data Owner
Housing and Economic Development
Time Period
Fall 2010
Frequency
To be determined.