Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > USGS Topo Maps

Shawnny3June 27th, 2011, 11:03 am
Pleasant Gap, PA

Posts: 1197
I don't know how many of you guys knew about this (probably everyone but me!), but the USGS recently began production of enhanced topo maps. They've currently mapped about half the states and are at varying degrees of completion with each. They've released each 7.5' x 7.5' quadrangle in PDF format using layers to show different types of data (added to this most recent release for the first time is a hydrographic layer!). You can turn on or off each type of layer with a simple toggle. The quadrangles are available for free download. I found they are each 10-20 MB in size. There is a toolbar you can also download (called TerraGo) that will enable you to interact with and personalize each map by marking spots, making notes, measuring distances and areas, and even track positions using your GPS. This seems like just the sort of tool a flyfisherman would find really useful. I'm pretty excited about it - Pennsylvania just got finished! Check it out here:
Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
KonchuJune 27th, 2011, 6:47 pm
Site Editor

Posts: 503
Thanks for this potentially valuable resource!

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.
Most Recent Posts
Re: Found some fishies to throw flies at, & get my 5-wt bent good too!
In the Photography Board by Jmd123 (Martinlf replied)
Re: Pteronarcys dorsata
In Pteronarcys dorsata Stonefly Nymph by Wiflyfisher (Jmd123 replied)
Re: Fly Fishing in Spain
In Fishing Reports by MIKETROUT64 (Martinlf replied)
Re: Nymphs recently molted
In General Discussion by Wiflyfisher (Partsman replied)
Re: Tiemco hooks
In Fly Tying by Flytyerinpa (Wbranch replied)
Re: Jonathon's moving again...
In General Discussion by Jmd123 (Martinlf replied)