kmz sampler - Morrison, Colorado area Map

Map Information

Created By: maps4gps
Last Updated: January 15th, 2010 5:01pm
Map Coverage:
North: 40°
West: -106° East: -105°
South: 39°
Country: United States
State: Colorado
Price: free

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Data is for Red Rocks Park (W105 12, N39 40), 1- mile northwestward of Morrison,
Colorado (edge of foothills west of Denver). Morrison, CO is listed in cities
under 'where to' on the OR 300. NED03 is 2+- miles north as no elevation
data at the 3 m resolution level currently exists in the RRP area.

This sampler of .kmz files consist of the following images:
From the USGS seamless server - usable download when appropriately sized:
    LANDCOVR - 30m pixel - landcover
    CANOPY   - 30m pixel - source tweak for tree cover
    IMPSURF - 30m pixel - source tweak for (manmade) impervious surfaces
    DOQQ     - 1m pixel - digital orthophoto quarter quad photography
    NAIP     - 1m pixel - national argricultural interpretation photography
    HRCITY06 - 0.6m pixel - high resolution city photography - 2ft
    HRCITY03 - 0.3m pixel - high resolution city photography - 1ft
     - some areas have 1/2ft coverage (1/4ft available for Portland, ME)
     - many areas are being covered every 2+- years, some using different scales
     - some areas are being covered as entire counties or even a State
    DRG024   - 2.4m pixel - image of 7-1/2' topo quads
     - 100K & 250K quads also available for download)
Other data from USGS seamless server - additional processing required:
    SRTM30   - 30m pixel satellite radar elevation data
     - usually much more 'noise' than the NED30 data
     - 90m also available for world land areas between 60N and 60S
    NED30    - 1 arc sec   (30m) pixel elevation - published topo source
    NED10    - 1/3 arc sec (10m) pixel elevation - usually pub topo source
    NED03    - 1/9 arc sec ( 3m) pixel elevation - LIDAR source
Data from other Federal websites (needs additional processing):
    ETM (NASA) - 14.25m pixel satellite image of world land areas
     - uses the most cloud free image over a few year time interval
    GEOL024 (USGS) - approx 2m for this 24K scale geologic map of a 7-1/2' quad
     - scales and coverage is variable
Special:
    NED60    - 60m pixel elevation - I subsampled the 10m NED data.
     Considering data set size, this would likely be the most detailed
     resolution to place on a website to cover the entire US.
     It is also the resolution of most of the data available for Alaska.


Viewing zoom range is dependent on the pixel size
- this is fixed by Garmin - I find the image clarity degrades 3-4 (or 5) zoom
    levels before the images stops being displayed
- having the built-in basemap enabled may lower the upper zoom level

     90 m:      20 mi - 0.2 mi
     60 m:      12 mi - 800 ft
     30 m:       5 mi - 500 ft
     14.25 m:    3 mi - 200 ft
     10 m:       2 mi - 120 ft
      3 m:     0.8 mi - 50 ft
      2.4 m:   0.5 mi - 50 ft
      2 m:     0.3 mi - 30 ft
      1 m:     0.3 mi - (20 ft)
      2 ft:    800 ft - (20 ft)
      1 ft:    500 ft - (20 ft)
      3 inch: 120 ft - (20 ft)

The area of the NED03 file is slightly north of I70 (nearest location with 1/9
arc sec elevation data). USGS's processing of the LIDAR data obtains true
ground elevations, however, using an unusually high vertical exaggeration,
houses can seen in some locations - at the expense of detail in the mesa sides.

Raster Navigation Charts are available from NOAA, however they carry a
copyright by a private company. The three I tested were near or larger than
the current Garmin limit for .kmz images and would have to be divided into
seperate (overlaping) images to keep the source resolution.

USGS seamless server images were in geotiff format. ETM and the geologic map
were in mrsid format. NOAA RNC are in their own specialized format.

Download Garmin Custom Map [73MB] (225 Downloads)

kmz sampler - Morrison, Colorado area Map

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