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Imperviousness change 2003-2007

Tags
Maine, USA, 2001, 2007


Summary

This is a representation of the changed impervious surfaces meeting specific criteria within the state of Maine, between the time of the early-date imagery (circa 2001 - 2003) and the late-date imagery (2007), depending on the location within the state. It was created as part of a project designed to quantify change in development between T1, or early date, and T2, or late date.

Description

This project resulted in the creation of raster data layers that document changes in the spatial pattern of commercial and residential development between two time periods in organized towns in Maine. This analysis was based primarily off leaf-off imagery from 2001-04 (T1) and leaf-on imagery collected in 2007 (T2) through the NAIP program (National Agriculture Imagery Program). Sanborn produced a yes/no “baseline” development raster from the 2001-04 imagery (T1), a yes/no “current” development raster from the 2007 imagery (T2), and a yes/no “new development between T1 and T2” raster. Sanborn classified the imagery for the 2001-04 baseline raster, the 2007 current raster, and the 2004-07 change in development raster and carried out a statistically valid accuracy assessment for the 2001-04 raster and the change analysis.

Credits

State of Maine, Sanborn Map Company

Use limitations

Extent

Scale Range

ArcGIS Metadata 

Topics and Keywords 

Place keywords  Maine, USA

Temporal keywords  2001, 2007

Citation 

Title maine_t2_change_final.img


Edition First


Presentation formats  digital map
FGDC geospatial presentation format  raster digital data


Resource Details 

Dataset languages  English


Processing environment Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcGIS 10.0.2.3200


Credits
State of Maine, Sanborn Map Company

Extents 

Extent
Geographic extent
Bounding rectangle
West longitude -71.189758
East longitude -66.837988
South latitude 42.941087
North latitude 47.378344

Resource Points of Contact 

Point of contact
Individual's name Donald Katnik
Organization's name Maine Dept of Inland Fisheries and Wildlife
Contact's position WRAS Habitat Group Leader
Contact's role  point of contact


Contact information
Phone
Voice 207-941-4455
Fax 207-941-4450

Address
Delivery point 650 State Street
City Bangor
Administrative area Maine
Postal code 04401
Country US
e-mail addressdonald.katnik@maine.gov

Hours of service Monday - Friday 8:00am-4:00pm


Resource Constraints 

Legal constraints
Limitations of use
See access and use constraints information.

Spatial Data Properties 

Georectified Grid
Number of dimensions 2


Axis dimensions properties
Dimension type  row (y-axis)
Dimension size 490944

Axis dimensions properties
Dimension type  column (x-axis)
Dimension size 328625

Cell geometry  area




Data Quality 

Lineage 

Process step
Description Creation of Final Dataset 1.) Once all impervious tiles were accepted, all T1 vector files were merged into a single vector file. The same was done with the T2 Change vector data. 2.) A Field was then calculated in the T1 one and T2 change vector data with a value of 1. 3.) Each file was converted to raster using Spatial Analyst. 4.) The Edited T1 Raster files were mosaicked into one file using the mosaic tool in Erdas Imagine. The same was done for T2 raster data. 5.) The Erdas mosaic tool was used to combine T1 raster data with the rasterized T1 vector data. This same process was used to combine the T2 raster data and the rasterized T2 vector data. 6.) Once that was complete the output T1 combined dataset was combined with the T2 datasets using the Erdas mosaic tool. This created the 2007 Impervious dataset. 7.) A model was written in ERDAS to subtract the T1 impervious from the 2007 T2 impervious dataset to create the change raster dataset. 8.) Each dataset was subset by township using the shapefile towns_dissolved.shp as a template. This was done using the Erdas mosaic tool.




Process step
Description Editing Impervious datasets 1.) An ArcMap document which was created by the state of Maine was used for all editing. The document contained a vector editing tool created by Maine to help edit missed buildings. 2.) A raster version of the automated T1 impervious was contained in the document. A blank raster to add T2 change such as roads, driveway or features that could not be captured by the building tool was added in. Two vector files were added from a geodatabase, one for T1 edits and another for T2 edits. 3.) The raster files were edited using the ArcScan Raster Paint tool. The vector files were edited using the tool that Maine created for editing buildings. 4.) Once editing was complete data were reviewed to make sure that all T1 and T2 impervious was captured.




Process step
Description T1 Impervious automated classification 1.) All imagery not in UTM Zone 19N NAD 1983. Any imagery that was not in that projection system was reprojected to that system. 2.) All T1 Imagery was resampled to 1 meter. 3.) Imagery was divided up into 475 production areas. The production areas were created based on imagery type. There were 5 different imagery types for T1. The imagery types were 2003 2ft, 2003 1ft, 2004 2ft, 2003 1ft, 2001 6inch. 4.) The imagery was mosaicked in to their respective production areas. 5.) Training models were created for each set of different imagery in Feature Analyst (Overwatch Geospatial). Once a model passed Quality Control checks, it was run on all imagery of the same vintage. 6.) Each production area’s Feature Analyst output was reviewed and a new model was created as necessary to further improve the output. 7.) Once a production area’s outputs were accepted, they were combined to make one file. 8.) Minimum mapping unit for structures captured was 900 sq. ft. 9.) Road types captured were paved roads, unpaved roads, driveways and logging roads. 10.) Other features captured landfills, road in gravel pits and cemetery roads. T2 Impervious classification 1.) All Imagery that was not in UTM Zone 19N NAD 1983 was reprojected to that system. 2.) All T2 Imagery was resampled to 1 meter. 3.) Imagery was mosaicked by type into the production areas created for the T1 imagery. There were 3 imagery types for T2, these were NAIP, 6inch 2006 York imagery and 6inch 2006 Columbine imagery. For editing purposes the 6inch imagery was used when available, otherwise NAIP was used. 4.) The T2 was edited using manual heads-up methods. 5.) Minimum mapping unit for structures captured was 900 sq. ft. 6.) Road types captured were paved roads, unpaved roads, driveways and logging roads. 7.) Other features captured landfills, road in gravel pits and cemetery roads.




Distribution 

Distributor
Contact information
Individual's name Donald Katnik
Organization's name (MDIFW) Maine Dept of Inland Fisheries and Wildlife
Contact's position Wildlife Biologist
Contact's role  distributor


Contact information
Phone
Voice 207 941-4455
Fax 207 941-4450

Address
Delivery point 650 State Street
City Bangor
Administrative area Maine
Postal code 04401
Country US
e-mail addressdonald.katnik@maine.gov

Hours of service Monday - Friday 8:00am-4:00pm




Transfer options
Online source
Location file://\\ann-svr-11\Vol1\current_projects\Maine\final_for_meta_Data\maine_t2_change_final.img

Fields 

Metadata Details 

Metadata language English
Metadata character set  utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata  dataset


Last update 2011-06-06


ArcGIS metadata properties
Metadata format ArcGIS 1.0


Created in ArcGIS for the item 2014-01-22 07:41:36



Metadata Contacts 

Metadata contact
Organization's name Sanborn Map Company, Inc.
Contact's role  point of contact


Contact information
Phone
Voice 734.213.1060
Fax 734.213.1085

Address
Delivery point 320 Miller Ave., Suite 80
City Ann Arbor
Administrative area MI
Postal code 48103
Country US
e-mail addressannarbor@sanborn.com

Hours of service M-F 9-5


Thumbnail and Enclosures 

Enclosure
Enclosure type  File
Description of enclosure original metadata
Original metadata document, which was translated yes
Source metadata format fgdc

FGDC Metadata (read-only) 

Identification 

Citation
Citation Information
Title
maine_t2_change_final.img
EditionFirst
Geospatial Data Presentation Formraster digital data
Online Linkagefile://\\ann-svr-11\Vol1\current_projects\Maine\final_for_meta_Data\maine_t2_change_final.img

Description
Abstract
                            This project resulted in the creation of raster data layers that document changes in the spatial pattern of commercial and residential development between two time periods in organized towns in Maine. This analysis was based primarily off leaf-off imagery from 2001-04 (T1) and leaf-on imagery collected in 2007 (T2) through the NAIP program (National Agriculture Imagery Program). Sanborn produced a yes/no “baseline” development raster from the 2001-04 imagery (T1), a yes/no “current” development raster from the 2007 imagery (T2), and a yes/no “new development between T1 and T2” raster. Sanborn classified the imagery for the 2001-04 baseline raster, the 2007 current raster, and the 2004-07 change in development raster and carried out a statistically valid accuracy assessment for the 2001-04 raster and the change analysis.
                          
Purpose
                            This is a representation of the changed impervious surfaces meeting specific criteria within the state of Maine, between the time of the early-date imagery (circa 2001 - 2003) and the late-date imagery (2007), depending on the location within the state. It was created as part of a project designed to quantify change in development between T1, or early date,  and T2, or late date.
                          
Spatial Domain
Bounding Coordinates
West Bounding Coordinate-71.189758
East Bounding Coordinate-66.837988
North Bounding Coordinate47.378344
South Bounding Coordinate42.941087

Keywords
Place
Place Keyword ThesaurusNone
Place KeywordMaine, USA

Temporal
Temporal Keyword ThesaurusNone
Temporal Keyword2001,2007

Point of Contact
Contact Information
Contact Organization Primary
Contact OrganizationMaine Dept of Inland Fisheries and Wildlife
Contact PersonDonald Katnik
Contact PositionWRAS Habitat Group Leader
Contact Address
Address TypeUnknown
Address650 State Street
CityBangor
State or ProvinceMaine
Postal Code04401
CountryUNITED STATES

Contact Voice Telephone207-941-4455
Contact Facsimile Telephone207-941-4450
Contact Electronic Mail Addressdonald.katnik@maine.gov
Hours of ServiceMonday - Friday 8:00am-4:00pm

Data Set Credit
                        State of Maine, Sanborn Map Company
                      
Native Data Set Environment
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcGIS 10.0.2.3200

Data Quality 

Lineage
Process Step
Process Description
                                T1 Impervious automated classification
1.) All imagery not in UTM Zone 19N NAD 1983.  Any imagery that was not in that projection system was reprojected to that  system.
2.) All T1 Imagery was resampled to 1 meter.
3.) Imagery was divided up into 475 production areas.  The production areas were created based on imagery type.  There were 5 different imagery types for T1.  The imagery types were 2003 2ft, 2003 1ft, 2004 2ft, 2003 1ft, 2001 6inch.
4.) The imagery was mosaicked in to their respective production areas.  
5.) Training models were created for each set of different imagery in Feature Analyst (Overwatch Geospatial).  Once a model  passed Quality Control checks, it was run on all imagery of the same vintage.
6.) Each production area’s Feature Analyst output was reviewed and a new model was created as necessary to further improve the output.
7.) Once a production area’s outputs were accepted, they were combined to make one file.
8.) Minimum mapping unit for structures captured was 900 sq. ft.
9.) Road types captured were paved roads, unpaved roads, driveways and logging roads.
10.) Other features captured landfills, road in gravel pits and cemetery roads.

T2 Impervious classification
1.) All Imagery that was not in UTM Zone 19N NAD 1983 was reprojected to that system.
2.) All T2 Imagery was resampled to 1 meter.
3.) Imagery was mosaicked by type into the production areas created for the T1 imagery.  There were 3 imagery types for T2, these were NAIP, 6inch 2006 York imagery and 6inch 2006 Columbine imagery.  For editing purposes the 6inch imagery was used when available, otherwise NAIP was used.
4.) The T2 was edited using manual heads-up methods.
5.) Minimum mapping unit for structures captured was 900 sq. ft.
6.) Road types captured were paved roads, unpaved roads, driveways and logging roads.
7.) Other features captured landfills, road in gravel pits and cemetery roads.
                              


Process Step
Process Description
                                Editing Impervious datasets
1.) An ArcMap document which was created by the state of Maine was used for all editing.  The document contained a vector editing tool created by Maine to help edit missed buildings.
2.) A raster version of the automated T1 impervious was contained in the document.  A blank raster to add T2 change such as roads, driveway or features that could not be captured by the building tool was added in.  Two vector files were added from a geodatabase, one for T1 edits and another for T2 edits.
3.) The raster files were edited using the ArcScan Raster Paint tool.  The vector files were edited using the tool that Maine created for editing buildings.
4.) Once editing was complete data were reviewed to make sure that all T1 and T2 impervious was captured.

                              


Process Step
Process Description
                                Creation of Final Dataset
1.) Once all impervious tiles were accepted, all T1 vector files were merged into a single vector file.  The same was done with the T2 Change vector data.
2.) A Field was then calculated in the T1 one and T2 change vector data with a value of 1.
3.) Each file was converted to raster using Spatial Analyst.
4.) The Edited T1 Raster files were mosaicked into one file using the mosaic tool in Erdas Imagine.  The same was done for T2 raster data.
5.) The Erdas mosaic tool was used to combine T1 raster data with the rasterized T1 vector data.  This same process was used to combine the T2 raster data and the rasterized T2 vector data.
6.) Once that was complete the output T1 combined dataset was combined with the T2 datasets using the Erdas mosaic tool. This created the 2007 Impervious dataset.
7.) A model was written in ERDAS to subtract the T1 impervious from the 2007 T2 impervious dataset to create the change raster dataset.
8.) Each dataset was subset by township using the shapefile towns_dissolved.shp as a template. This was done using the Erdas mosaic tool.

                              


Spatial Data Organization 

Direct Spatial Reference MethodRaster


Raster Object Information
Raster Object TypePixel
Row Count490944
Column Count328625

Spatial Reference 

Horizontal Coordinate System Definition
Planar
Map Projection
Map Projection NameNAD 1983 UTM Zone 19N
Transverse Mercator
Scale Factor at Central Meridian
Longitude of Central Meridian
Latitude of Projection Origin
False Easting
False Northing

Planar Coordinate Information
Planar Coordinate Encoding Methodcoordinate pair
Coordinate Representation
Abscissa Resolution0.000000002220024164500956
Ordinate Resolution0.000000002220024164500956
Planar Distance UnitsMeter

Geodetic Model
Horizontal Datum NameD North American 1983
Ellipsoid NameGRS 1980
Semi-major Axis6378137.0
Denominator of Flattening Ratio298.257222101

Entities and Attributes 

Distribution Information 

Distributor
Contact Information
Contact Organization Primary
Contact Organization(MDIFW) Maine Dept of Inland Fisheries and Wildlife
Contact PersonDonald Katnik
Contact PositionWildlife Biologist
Contact Address
Address TypeUnknown
Address650 State Street
CityBangor
State or ProvinceMaine
Postal Code04401
CountryUNITED STATES

Contact Voice Telephone207 941-4455
Contact Facsimile Telephone207 941-4450
Contact Electronic Mail Addressdonald.katnik@maine.gov
Hours of ServiceMonday - Friday 8:00am-4:00pm

Distribution Liability
                        See access and use constraints information.
                      

Metadata Reference 

Metadata Date2011-06-06
Metadata Contact
Contact Information
Contact Organization Primary
Contact OrganizationSanborn Map Company, Inc.
Contact Address
Address TypeUnknown
Address320 Miller Ave., Suite 80
CityAnn Arbor
State or ProvinceMI
Postal Code48103
CountryUNITED STATES

Contact Voice Telephone734.213.1060
Contact Facsimile Telephone734.213.1085
Contact Electronic Mail Addressannarbor@sanborn.com
Hours of ServiceM-F 9-5

Metadata Standard NameFGDC Content Standard for Digital Geospatial Metadata
Metadata Standard VersionFGDC-STD-001-1998