20181228 08582200 1.0 FGDC CSDGM Metadata FALSE BuildingFootprints 189401.585400 339263.147500 382556.829100 539507.317200 1 002 8.630 Projected GCS_North_American_1983_HARN Linear Unit: Meter (1.000000) NAD_1983_HARN_StatePlane_Montana_FIPS_2500 <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.5'><WKT>PROJCS["NAD_1983_HARN_StatePlane_Montana_FIPS_2500",GEOGCS["GCS_North_American_1983_HARN",DATUM["D_North_American_1983_HARN",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",600000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-109.5],PARAMETER["Standard_Parallel_1",45.0],PARAMETER["Standard_Parallel_2",49.0],PARAMETER["Latitude_Of_Origin",44.25],UNIT["Meter",1.0],AUTHORITY["EPSG",2818]]</WKT><XOrigin>-35666000</XOrigin><YOrigin>-30006900</YOrigin><XYScale>124182419.54917815</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102300</WKID><LatestWKID>2818</LatestWKID></ProjectedCoordinateSystem> 20181228 08590700 20181228 08590700 150000000 5000 FGDC Mindy Cochran Flathead County GIS Program Manager (406)758-5540 (406)758-2139 800 South Main Street Room 203 Kalispell MT 59901 gis_online@flathead.mt.gov 8:00 am - 5:00 pm 20080612 ArcGIS Metadata 1.0 Flathead County GIS 406-758-5540 406-758-2139 800 South Main Street Room 203 Kalispell MT 59901 US gis_online@flathead.mt.gov 8:00 - 5:00 Monday - Friday ESRI shp file and/or feature class Shapefile 8.630 2005-01-01 Flathead County GIS Flathead County GIS Kalispell, Montana Flathead County Building Footprints Credit given to Microsoft and Flathead County GIS would be appreciated when deriving products from this data. Mindy Cochran Flathead County GIS Program Manager (406)758-5540 (406)758-2139 800 South Main Street Room 203 Kalispell Montana 59901 US gis_online@flathead.mt.gov 8:00 am - 5:00 pm Flathead County ISO 19115 Topic Category Flathead County Building Footprints <DIV STYLE="text-align:Left;"><DIV>Neither Flathead County, nor any of its employees, makes any warranty or guarantee to this data and assumes no legal responsibility for the information. Information is derived from multiple sources, subject to constant change, and may be of questionable accuracy, currency and completeness. Data is provided for informational purposes only. Primary information sources should be consulted for verification of data. Deriving conclusions from this data is done at the user’s risk. This data does not necessarily meet mapping, surveying, or engineering standards and is not intended for design purposes. User should use caution when overlaying other datasets as it may not display correctly with other layers.</DIV></DIV> publication date Version 6.2 (Build 9200) ; Esri ArcGIS 10.5.0.6491 1 -115.113221 -112.972963 49.051252 47.563876 This data represents computer generated building footprints and was originally provided by Microsoft in a GeoJSON format. Flathead County GIS used QGIS to export the data as a feature class, reproject the data, and clip it to Flathead County. The vintage of the footprints depends on the vintage of the underlying imagery. Because Bing Imagery is a composite of multiple sources it is difficult to know the exact dates for individual pieces of data. However, we (Flathead County) believes ~2011 era imagery was used in our region. We intended to go through Department of Revenue data to look for builds after that data and update manually - this work is ongoing. <DIV STYLE="text-align:Left;"><DIV>Microsoft says the building extraction was done in two stages:1.Semantic Segmentation – Recognizing building pixels on the aerial image using DNNs2.Polygonization – Converting building pixel blobs into polygonsWe developed a method that approximates the prediction pixels into polygons making decisions based on the whole prediction feature space. This is very different from standard approaches, e.g. Douglas-Peucker algorithm, which are greedy in nature. The method tries to impose some of a priory building properties, which are, at the moment, manually defined and automatically tuned. Some of these a priori properties are:1.The building edge must be of at least some length, both relative and absolute, e.g. 3 meters2.Consecutive edge angles are likely to be 90 degrees3.Consecutive angles cannot be very sharp, smaller by some auto-tuned threshold, e.g. 30 degrees4.Building angles likely have very few dominant angles, meaning all building edges are forming angle of (dominant angle ± nπ/2)In near future, we will be looking to deduce this automatically from existing building information. We track various metrics to measure the quality of the output. Estimated building matching metrics:Precision 99.3% Recall 93.5% Our metrics show that in the vast majority of cases the quality is at least as good as data hand digitized buildings in OpenStreetMap. It is not perfect, particularly in dense urban areas but it is still awesome.</DIV></DIV> N/A 59263 Feature Class BuildingFootprints FID FID OID 4 0 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. OBJECTID OBJECTID Integer 10 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. FID_1 FID_1 Double 19 0 0 Shape Shape Geometry 0 0 0 Feature geometry. Esri Coordinates defining the features. Shape_STAr Shape_STAr Double 19 0 0 Shape_STLe Shape_STLe Double 19 0 0 dataset EPSG 6.13(9.0.0) 59263 Simple FALSE 59263 TRUE FALSE