H2O Posted January 10 Share Posted January 10 12 minutes ago, Eskimo Joe said: Thank you. Those are communists who hate our freedoms. State plane or bust, glad Maryland only has 1 state plane. PA had 2. Thats because MD is so tiny it doesn't need 2 like VA. Get a bigger state to be like the big boy states. 1 Link to comment Share on other sites More sharing options...
H2O Posted January 10 Share Posted January 10 32 minutes ago, mappy said: hahaha we are talking about coordinate systems. each coordinate system has a geodetic datum, which is the reference used for positioning the earth when locations were collected. Most commonly used is NAD83, which is based on the geodetic reference system of 1980. NAD27 is a totally different ellipse. If you were to plot the same points using each datum, they would not line up exactly, there would be an offset to take into account that change in earth reference position. fun stuff! you could always tell who was using 27 vs 83 cause there was an immediate 30 ft shift at the minimum. Good times!! 1 Link to comment Share on other sites More sharing options...
WEATHER53 Posted January 10 Share Posted January 10 4 hours ago, Paleocene said: This storm did not hit the Pepco service area too hard. only 0.1% of customers have an outage. https://secure.pepco.com/FaceBook/Pages/outagemap.aspx Pepco extreme tree trimming did wonders. Link to comment Share on other sites More sharing options...
Paleocene Posted January 10 Share Posted January 10 1 minute ago, WEATHER53 said: Pepco extreme tree trimming did wonders. We had a lot of flickers in the 20910 zip code in the afternoon yesterday, but no outages. I have been impressed with Pepco reliability in my nhood (where I have been since 2020). Knock on wood. Link to comment Share on other sites More sharing options...
Maestrobjwa Posted January 10 Share Posted January 10 48 minutes ago, mappy said: hahaha we are talking about coordinate systems. each coordinate system has a geodetic datum, which is the reference used for positioning the earth when locations were collected. Most commonly used is NAD83, which is based on the geodetic reference system of 1980. NAD27 is a totally different ellipse. If you were to plot the same points using each datum, they would not line up exactly, there would be an offset to take into account that change in earth reference position. fun stuff! Ah so this is your area of expertise, huh? (I should've guessed because, well...Mappy, lol) Link to comment Share on other sites More sharing options...
WEATHER53 Posted January 10 Share Posted January 10 1 hour ago, Random Chaos said: Last night was #3 on record at 5.11ft MLLW in Annapolis. #2 was 1933 at 6.18ft MLLW. #1 was 2003 at 7.20ft MLLW. That's at least for the timer period we have records for. Isabel and the storm thst created OC and this dumb bulb is dismissing as non exceptional and referenced incorrect wind direction Link to comment Share on other sites More sharing options...
North Balti Zen Posted January 10 Share Posted January 10 Just got a text that allegedly my power has been restored. Please don't be effin' with me BGE. Please. 2 Link to comment Share on other sites More sharing options...
WEATHER53 Posted January 10 Share Posted January 10 40 minutes ago, Paleocene said: We had a lot of flickers in the 20910 zip code in the afternoon yesterday, but no outages. I have been impressed with Pepco reliability in my nhood (where I have been since 2020). Knock on wood. In the early 2000’s I was losing power for 24 hours about every other year. Snow or wind did it. About 5 times in a 10 year run. They came through around 2012 and I have not lost power for more than 3 hours and that one a guy flew a plane into wires. 1 Link to comment Share on other sites More sharing options...
Yeoman Posted January 10 Share Posted January 10 6 hours ago, Scuddz said: Why are my kids schools closed?! These poor kids might poke their eyes out trying to open an umbrella! Hopefully they figure it out by the time they leave the house at age 45 Link to comment Share on other sites More sharing options...
mappy Posted January 10 Share Posted January 10 53 minutes ago, vastateofmind said: So...it IS actually fun and interesting, at least to me. I did the requisite 15-min Google search-and-skim on the geodetic systems that you, @H2O and @Random Chaos were discussing on this page and the last page in this discussion. It's fascinating to read about how/when standards are updated, and how the new standard compares to the old ones. While I am...WAY...beyond being able to change careers at the dinosaur stage of my current professional life, I wish I'd had the interest and ability to learn more about surveying and GIS far earlier in my career. I love how it holds the possibility to get you out and away from an office desk/chair and out in the field... Ha, I never go out in the field. I am very comfortable behind the computer doing my thing 41 minutes ago, H2O said: At least most of the stuff you work with HAD coordinates. Old plats and deeds I worked on only gave descriptions like: From the stump by old man Miller's barn go northerly 100 rods to the rock. then go northeasterly 50 chains to the cedar post next to Ichabod Crane's headstone, thence southerly 85 cubits to the middle of the crick in Johnston's potato field, then westerly 400 paces to the point of beginning. If I even had NAD27 I cried tears of happiness. LOLOL much like me being told they have GIS data to send, and it's a PDF with layers I have to georeference, then digitize. Sigh. 41 minutes ago, Rhino16 said: I’m so glad school is throwing the GIS stuff at me because it can sometimes be fun, but it’s also useful in case meteorology doesn’t work out. (But it will.) Yay GIS!! It's the best. 37 minutes ago, H2O said: you could always tell who was using 27 vs 83 cause there was an immediate 30 ft shift at the minimum. Good times!! Right?! NAD27 should just be abolished IMO 2 Link to comment Share on other sites More sharing options...
Random Chaos Posted January 10 Share Posted January 10 1 hour ago, H2O said: At least most of the stuff you work with HAD coordinates. Old plats and deeds I worked on only gave descriptions like: From the stump by old man Miller's barn go northerly 100 rods to the rock. then go northeasterly 50 chains to the cedar post next to Ichabod Crane's headstone, thence southerly 85 cubits to the middle of the crick in Johnston's potato field, then westerly 400 paces to the point of beginning. If I even had NAD27 I cried tears of happiness. Hey, Ichabod Crane's headstone is a nice stone monument point to base everything else off of! You should be glad they actually included something that wasn't going to decay! 1 1 Link to comment Share on other sites More sharing options...
WEATHER53 Posted January 10 Share Posted January 10 21 minutes ago, Yeoman said: These poor kids might poke their eyes out trying to open an umbrella! Hopefully they figure it out by the time they leave the house at age 45 We are a right smart candy ass now vs our school years. Link to comment Share on other sites More sharing options...
Interstate Posted January 10 Share Posted January 10 6 hours ago, nukeing said: Ended with 1.8". Lost a big oak at the end of our driveway unfortunately. County cleared it from the road but I have a lot of chainsawing to do this weekend At least the trashcans stayed upright. 1 1 Link to comment Share on other sites More sharing options...
nukeing Posted January 10 Share Posted January 10 At least the trashcans stayed upright.Did end up with damage to one of the lids but could have been worse for sure! Link to comment Share on other sites More sharing options...
ThePhotoGuy Posted January 10 Share Posted January 10 Rain total: 2.80 Link to comment Share on other sites More sharing options...
Herb@MAWS Posted January 11 Share Posted January 11 3.1” rainfall in my part of Columbia. Link to comment Share on other sites More sharing options...
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