Search found 11 matches

by Jelfff
Wed Dec 28, 2016 9:04 pm
Forum: Campfire Talk
Topic: Tips for calling 911 with a cell phone - A peek under the hood
Replies: 0
Views: 560

Tips for calling 911 with a cell phone - A peek under the hood

I am a software developer working with online maps and location technology. Earlier this year I became interested in what happens when someone with a cell phone calls 911. In particular I wanted to know the details of how the 911 dispatcher learns the *location* of the caller. What kind of digital m...
by Jelfff
Wed May 13, 2015 4:21 pm
Forum: Mule Deer - General
Topic: Online maps showing public land boundaries - and more - with geolocation
Replies: 2
Views: 752

Online maps showing public land boundaries - and more - with geolocation

Most states have detailed information on GIS (Geographical Information System) servers that can show the boundaries of various kinds of public land at the federal, state and local level. Government agencies also have other GIS data that is useful for all kinds of outdoor activities from hunting to 4...
by Jelfff
Thu Sep 25, 2014 9:47 pm
Forum: Mule Deer - General
Topic: Gmap4 = View topos/aerials *offline* and your geolocation
Replies: 0
Views: 958

Gmap4 = View topos/aerials *offline* and your geolocation

I have posted here before about Gmap4 which is an enhanced Google map viewer that I developed. Up until this summer I believed that Gmap4 would not work if your mobile browser was offline. I was wrong. If you follow a few simple instructions, many (but not all) of the Gmap4 features will work just f...
by Jelfff
Sun Feb 02, 2014 1:04 pm
Forum: Mule Deer - General
Topic: How to: Aerial map with topo lines
Replies: 0
Views: 1207

How to: Aerial map with topo lines

In case anyone finds it useful, here is how you can display topographic lines on top of an aerial . The following link starts Gmap4 (I am the developer) and if you zoom in until the scale in the lower left says 500 ft then you will see topo lines on the Google aerial for anywhere in the U.S. http://...
by Jelfff
Thu Aug 22, 2013 3:59 pm
Forum: Mule Deer - General
Topic: Online boundary map - Land owned by federal government
Replies: 3
Views: 1089

Re: Online boundary map - Land owned by federal government

Pretty cool/interesting. Thanks for the link also. So pretty much ANYTHING not in green or yellow is either private property or owned by the state? Maybe. Of course the data on the map could simply be wrong or incomplete. Someone already pointed out a couple federal wildlife areas of some kind that...
by Jelfff
Tue Aug 20, 2013 12:16 pm
Forum: Mule Deer - General
Topic: Online boundary map - Land owned by federal government
Replies: 3
Views: 1089

Online boundary map - Land owned by federal government

The following link starts Gmap4 (enhanced Google map viewer) and shows the detailed boundary for land owned by the federal government. This includes national forest land, Bureau of Land Management holdings and other land. This map opens centered near Denver but can display data for all of the USA. G...
by Jelfff
Sun Jun 16, 2013 10:24 am
Forum: Campfire Talk
Topic: Gmap4 = Google Maps + topographic maps + more
Replies: 6
Views: 3320

Re: Gmap4 = Google Maps + topographic maps + more

In order to help plan a hunting trip on public land have you ever wanted to see an online map that showed a very detailed view of the boundaries of land that is actually owned by the federal government ? It is common for land that is managed by the BLM or managed as part of a national forest to be i...
by Jelfff
Fri Mar 22, 2013 4:25 pm
Forum: Campfire Talk
Topic: Gmap4 = Google Maps + topographic maps + more
Replies: 6
Views: 3320

Re: Gmap4 = Google Maps + topographic maps + more

Recently Gmap4 was updated to version 4.1 and now includes a unique map-in-a-link feature that is worth mentioning. Anyone can now make a custom map and save their data right in a Gmap4 link. You do not need to save your data in a separate file such as a GPX or KML file. This may be the easiest and ...
by Jelfff
Sun Jan 29, 2012 4:02 pm
Forum: Campfire Talk
Topic: Gmap4 = Google Maps + topographic maps + more
Replies: 6
Views: 3320

Re: Gmap4 = Google Maps + topographic maps + more

The Gmap4 code has been updated to version 3.0. There are two new ‘big’ features that many people will find useful. First, Gmap4 can now display a new set of very high resolution USA topographic maps that (1) are a better quality image than the MyTopo maps, (2) do not have heavy watermarks obscuring...
by Jelfff
Thu Dec 22, 2011 11:50 am
Forum: Campfire Talk
Topic: Gmap4 = Google Maps + topographic maps + more
Replies: 6
Views: 3320

Re: Gmap4 = Google Maps + topographic maps + more

The Gmap4 production code is now version 2.3. This is the first version that includes special features for smartphones and other mobile devices . 1. Gmap4 can now find your location on the map. This service will use some or all of: * Your IP address * Cell towers * Wi-fi hotspots * Any GPS chip in y...

Go to advanced search

cron