Maps and Mapping

• Free DIY Color-Coded Maps
• TerraServer USA
• Texas Natural Resources Info System - Digital Orthophotos
• TopoZone - Web Topographic Maps
• U.T. Texas Map Collection

Miscellaneous 

• Animated Knot Lessons - by 42nd Brighton (Saltdean) Scout Group, UK 
• British Scouting: A - Z of Knots 
• NASA Sky Watch Sighting Opportunities page 
• US Naval Observatory Master Clock Time

Texas River Info 

• Big Bend National Park Official NPS Website
• Brazos River Authority Gauging Stations/Water Levels 
• Corps of Engineers, Fort Worth District Lake Basin Reports 
• Lower Colorado River Authority Lake and River Data 
• Texas Parks and Wildlife Online Boater Education Course 
• TPWD Texas River Guide 
• TPWD Texas River Guide- Table of Contents 
• USGS Brazos River Gauge near Palo Pinto 
• USGS Texas Streamflow Conditions by Major River Basin