Links for the Average Rancher 


Acme Planimeter – - A planimeter is real life tool used to measure acreages on specifically-scaled maps.  This online planimeter uses Google Maps to let you draw any shape you’d like and see the acreage.  This is useful for irrigation system sizing, seeding orders, hay production calculation, nutrient application, etc.

GMap Pedometer - - Like the planimeter, this tool lets you measure distances on Google Maps.  Make sure you set the button to “manually (straight lines)” so that you can draw a line anywhere you like.  Otherwise the tool tries to follow roads.

 Colorado Division of Water Resources Water Rights Map – homepage: Map Viewer - - The DWR has a useful Map tool that lets you view a map of the state and all of the diversions.  Your headgate right off the ditch may not be here, but the headgate at the stream source will.  It also includes wells and springs.

 CoAgMET - - The Bookcliff and Mount Sopris Conservation Districts are partnering with the CSU Climatology Center to purchase and install two AgMET stations in the area.  One will be located on the Silt Mesa and the other somewhere in the Roaring Fork Valley.  The stations relay weather data that the public can access.  The stations measure daily temp, vapor pressure, solar radiation, daily precipitation, wind speeds, soil temp, relative humidity, and most importantly, growing degree days and evapotranspiration.  This tool will be very useful for irrigation scheduling.  You will be able to see what the daily water use requirement for a typical hay field/pasture in the area and then schedule your irrigations based on how much water was consumed and how much needs to be replaced.

 eRams - - eRams has a suite of GIS tools.  The Water W.I.S.E. tool lets you create a custom irrigation schedule based on your soils, crops, and irrigation system all based on local data from the CoAgMet station.  You have to create a free account to use the tools.

 NRCS Web Soil Survey - - Create customized soil reports for any property.

 Feedipedia – Database of many forages with information about nutritive value (i.e. Crude Protein, NDF, ash, dry matter, micronutrients, digestibility, etc).  Very useful when trying to determine seed mixture to meet a forage need (i.e. premium hay for horses or dairy animals).

Colorado Dept of Ag and Consumer Services Weed Fact Sheets – A database of all Colorado listed noxious weed species along with .pdf fact sheets about identification and control.  There is also a mobile application available for iOS and Android devices.

USGS EarthExplorer - - A technical, but useful data distribution site.  Contains many useful USGS products including all archived historic aerial imagery (in some cases back to the 1940s).   Easy to use GoogleMaps interface.  Some downloaded data requires GIS to use but aerial images can be download to typical image formats.

Eagle/Garfield/Pitkin County GIS Maps – These counties provide a useful web-based GIS map that allows the public to search for information.  This includes parcel owner information.

                Eagle County -

                Garfield County -

                Pitkin County -


**Websites often change their URLs (addresses).  If any of these address don’t work use a search engine and enter the title.  The page should be the first result!**