Vector Data

These are miscellaneous vector layers produced by the Flathead Basin 2009 mapping project in support of the effort to collect elevation data and orthoimagery. The project area includes the Flathead Valley north of Flathead Lake and the immediate areas around Whitefish Lake, Flathead Lake, Swan Lake, and Polson. The data were collected between September 22 and September 29, 2009.

These data are in Montana State Plane coordinates, NAD83, HARN. The horizontal units of the coordinate system are U.S. Survey Feet.

• Roads. This is an ESRI shapefile containing polygons showing the areas covered by paved roads, unpaved roads, and road bridges. Metadata for this layer is available here.
• Breaklines. This is an ESRI file geodatabase containing hydrologically significant features used to control the creation of a digital elevation model. Breakline features include roads, railroads, intermittent stream centerlines, perennial stream edges, lake and pond polygons, canals, dams, and ditches. Metadata for this layer is available here.
• Downloadable Orthophoto Files. This is a shapefile index to the downloadable zip files for the natural-color and color infrared orthophotos on this web site. Each polygon represents one individual data file and gives its file name and the URLs for the zip files that contains it.
• Downloadable Contour and DEM Index. This is a shapefile index to the downloadable zip files for the contour line and Digital Elevation Model data sets on this web site. Each polygon represents one individual data file and gives its file name and the URLs for the zip files that contain the individual files.
• Downloadable LiDAR Files. This is a shapefile index to the downloadable zip files for the LiDAR point cloud data sets on this web site. Each polygon represents one individual data file and gives its file name and the URLs for the zip files that contain it.