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About sunshot99

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  • Birthday 12/12/1967

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    Houston, Texas
  1. SHAC JAM - Boy Scout Geocaching

    Thanks for the offer - as we get a little closer I will be in touch. Thanks Mr. Z for getting the training - it really helps to have a list of trained adults to call on. Many of our parents won't take the time so we can't use their help at events.
  2. SHAC JAM - Boy Scout Geocaching

    As we get a little closer I will get in touch - thanks
  3. District Rollcall

    I am in Mustang - Scoutmaster Troop 1836
  4. SHAC JAM - Boy Scout Geocaching

    Hey Folks, I am part of the group putting together the geocaching program for Sam Houston Area Councils big October event called SHAC JAM. BSA has started two programs to get scouts into caching - the first is Cache to Eagle: The second is the new GPS\GIS merit badge - it will be official by summer camp. We are looking for some cachers that would be interested in helping with the caching booth on October 8th at the Texas Motor Speedway by College Station. We will be camping for the weekend but the event is on Saturday. Let me know if you are interested - we will have a couple meetings but you only need to attend if you want - we will be sending out emails. Thanks, sunshot99 - "Get up, Get out, Find it!"
  5. “in memory of” bench for LjTxHiker

    Very cool and a great tribute.
  6. Question on Reciprocal Bearings

    I think with some people the confusion here might be the mixing of terms – a bearing like North 10 degrees East would have a back bearing of South 10 degrees West. An azimuth of 10 degrees North would have a back azimuth of 190 degrees South. We won’t even add in anything about declination because most outdoors people today deal with strictly magnetic compass readings. But you must be careful in knowing your quadrants if you are going to use bearings (0 to 90, 90 to 0, 0 to 90, 90 to 0). I find them much more comfortable to use because of my surveying back ground. I hope this helps. Jib
  7. What is this? (survey disc)

    Yeah right - just to clarify, about the pic's - I have hundreds of benchmark pictures, not all of which I have taken. I have researched benchmarks for college classes and received pic's from other friends that go benchmarking.
  8. What is this? (survey disc)

    The bottom BM is a type of vertical benchmark that came about after WW II called an "OS BM" which means Ordinance Survey Bench Mark. They have continued the design use but I am not sure if they are putting any new ones out. In the few countries I have found BM's in, they have transitioned into the standard brass or aluminum disk. All BM's of this type are set vertically. Jib
  9. What is this? (survey disc)

    There are so many cool designs - not as much fun for the kids but cool for the rest of us. [House cleaning - attachment deleted by admin]
  10. What is this? (survey disc)

    I love benchmarks and have hundreds of pictures from all over the world. There are several things going on around the reservoir that surveyors have to be aware of in regards to benchmarks. When looking for NGS benchmarks, most have been destroyed by construction crews of one sort or another. Second, the NGS network was in such bad repair (missing BM's) they didn't have the budget to replace missing BM's. But the biggest reason most were not replaced was Tropical Storm Allison. Harris County needed to be resurveyed after the storm to map the new flood plane after 40 years of development. NGS lucked out and FEMA put up the budget for the resurvey and the new benchmark network. Most of the NGS benchmarks are not part of the new network and thus fallen into worse shape. Also, the new network was all GPS derived and has a better adjustment. When looking up NGS benchmarks go directly to the site and look or print the data sheets. Do not be discouraged when you see “mark not found” I have found countless BM’s that were listed as destroyed. It helps at first if you look in areas you know well because of road widen and construction. I get coordinates from Google earth then do a radial search, when I put in Addicks and a 3 mile radius this is what I got: see attachment There are about 40 listed within 3 miles but most are listed as “mark not found”. There are many private companies that survey for the ACOE and each will set there on control points around the project area. I have found location with as many as 18 control points within a 25 foot area – thus the reason Terra (as we do) puts their name on the shiner. Here is the Corps web page on Addicks: I don't know that much about the history of the reservoir itself but I will do a little research and get back to you. Jib [House cleaning - attachment deleted by admin]
  11. Anyone going caching for Labor Day?

    We will be out all weekend - i may even get up early (4am) Saturday and Sunday to do 5 or 6 hours before I go back to get the kids - let me know what area you want to work. Jib
  12. Corkscrew?

    Welcome to the board - it is a tough call, my kids are always grapping at stuff before I can see it but a little "look before you leap" lesson never hurts. Joyrose's suggestion is good too - events are a great place to help out with door prizes. Jib
  13. What is this? (survey disc)

    Sorry, I didn't see the post earlier. That is a survey control point, I worked at Terra Surveying for several years and have set hundreds of those myself. It is used as either a GPS point and/or an instrument station. How it works is this: The point is set as part of a group of others that encircle a specific site. The points are "tied" together with GPS or conventional survey equipment (Total Station) and the angular and distance relationship is established. We use several different ways to check the integrity of the located points - the most common way is a math system called "least squares adjustment" that is based on expected values reduced down to the square root function. Once the relationship is proven - the field crew will locate all the physical improvements on the site. All the field data points are turned into a finished survey in the office using either AutoCADD or Microstation. The control point in the picture is made of the highest quality of nails called a "magnail" which is magnetized and gives a great signal on the field locators even 20 years after being set. This makes it much easier to relocate old control points. If you have been out to find any published benchmarks - the previous post is correct, this (when used for elevations) is called a temporary benchmark. The elevations of a known point will be transfered either by GPS or differential leveling to this point for a specific site or as part of a larger network of points. I hope this helps. sunshot99
  14. Another use for an ammo can besides Geocaching....

    What a cool idea - I need one - besides our home system is about to bit the dust.