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Joseph Elfelt https://m.ai6yr.org/@mappingsupport Profile picture
@MappingSupport
Jan 31, 2020 • 7 tweets • 5 min read • Read on X
1/7 Curated list of 3,500+ government #ArcGIS server addresses. All links tested once per week and bad links fixed or flagged. These are ArcGIS servers, not 'portals'.
#URISA #fedGIS #GIS #GISP #GeoSpatial #ESRI #MAPPS @GISLounge @directionsmag
Open PDF:
mappingsupport.com/p/surf_gis/lis… Image
2/7 @server Admins: If my list says “not https” or “SSL problem” then you can fix that with a free SSL certificate from letsencrypt.org. My domains use these. The “SSL problem” tag in the curated server list means Firefox found something wrong with your SSL certificate.
3/7 To find data quickly on an ArcGIS try a Google advanced search. For example, to find trail layers search on:
trails site:____
Replace the underline with an ArcGIS server address.
4/7 There is a *beta* version of #GISsurfer v2.0 (I am developer) that lets anyone surf ArcGIS servers almost as easily as you surf the internet. No GIS savvy required! Curious? Start here:
mappingsupport.com/p2/gissurfer-b…
5/7 Finishing GISsurfer v2.0 is temporarily on hold while I scour my curated server list for data to produce state legislature maps colored by party affiliation. Map links are on this webpage. Open any map and click “Map tips” for info.
mappingsupport.com/p2/gissurfer-p…
6/7 If you are curious where the layers are coming from for any legislature map, then notice that each map link has the address for a txt file. That txt file specifies the GIS layers the map can display. Copy *just* the address for the txt file and paste it into a browser.
7/7 Don’t see a colored political district map for your state? I would love to do one! Can you help with the data? I need:
1. ArcGIS MapServer layers with the current legislative boundaries
2. Support for dynamic layers
3. An attribute with party affiliation

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More from @MappingSupport

Joseph Elfelt https://m.ai6yr.org/@mappingsupport Profile picture
Aug 19, 2021
1/ If you are looking at any of the interactive #GISsurfer wildland fire maps I have posted, here is a thread that will help you use the map. #DixieFire #FrenchFire #CaldorFire #McFarlandFire #MonumentFire #SchneiderSpringsFire
2/ To search on an address click Menu > Search.

To change the basemap, click the button next to the “Menu” button. Basemaps I usually use are:
USA basemap
ESRI scanned topo USA
Open street map
3/ To turn on geolocation tap Menu > My location.
A symbol will appear and follow you as you move.
Tap that symbol to see your coordinates and accuracy value.
Read 11 tweets
Joseph Elfelt https://m.ai6yr.org/@mappingsupport Profile picture
Jan 26, 2021
1/_ Calling 911 with a cell phone to get help? They might not know your location unless you tell them! FindMeSAR.com (I am developer) is a web page that uses the GPS in your phone to display your coordinates and accuracy value. #SearchAndRescue #DebrisFlow
2/_ Use it like so:
Browse to FindMeSAR.com
Tap “Next format” until the yellow screen appears
Wait a few seconds for the accuracy value to get to 30 feet or less
Tap ‘Stop”
#EmergencyManagement
3/_ The yellow screen displays your location in latitude longitude, decimal degrees. Every 911 call center understands that coordinate format.
There is an icon you can save on your home screen.
Read 9 tweets
Joseph Elfelt https://m.ai6yr.org/@mappingsupport Profile picture
Jan 24, 2021
1/_ Interactive #GIS map showing risk of #DebisFlow for wildland fires. For the legend and to get the most benefit from the map, please click “Map tips” in upper left corner. To search on address click Menu > Search. #CAwx

Open #GISsurfer map: bit.ly/39Y5BRA Image
2/_ The map opens at the #CZULightningComplex. You can pan the map to other 2020 fires and see the same type of data. Be patient! The map might be slow to refresh. It depends in part on how much other work the GIS server is doing.
3/_ The map can display the risk of debris flow for fires back to 2017. Here is one way to make a map to see the risk of debris flow for a fire prior to 2020:
A. Click the basemap button and look under the “Overlays” heading
B. Click “Turn off all overlays”
Read 12 tweets
Joseph Elfelt https://m.ai6yr.org/@mappingsupport Profile picture
Jan 15, 2021
1/_ Trump does not own Mar-a-Lago and is prohibited from living there by the 1993 agreement he signed and permits issued by the City of Palm Beach. See thread for links to source documents.
**I will post unroll link.** Image
2/_ In early 1993 Trump was the sole owner of Mar-a-Lago. He filed an application with the city to convert it into a private club since he was in financial trouble and the cost of upkeep was high.
3/_ Chronology
March 1993 - Application for a Special Exemption Use and Preservation Plan
April 1993 - Addendum to the application
November 1993 - Use Agreement
Read 22 tweets
Joseph Elfelt https://m.ai6yr.org/@mappingsupport Profile picture
Dec 16, 2020
1/18 Yesterday @gregolear published an article by @ThatShockratees which has the potential to be a game-changer for the senate by preventing Mitch McConnell from stonewalling the Biden agenda.

This thread provides additional analysis, clarification and citation to authority.
2/18 I have gone full circle from endorsing the idea, to expressing great skepticism and, after additional research, am back on the endorsing side. My compliments to @ThatShockratees

The analysis below *assumes* Rs retain the senate majority.
3/18 The published article talks about two things.

1. Delegation of the task of presiding over the senate.
2. Decisions by presiding officer as to which senator is recognized to speak.

The key is #2.
Read 22 tweets
Joseph Elfelt https://m.ai6yr.org/@mappingsupport Profile picture
Oct 18, 2020
1/7 This tweet thread describes the authoritative USA county-level *daily count* COVID-19 data that is hosted on my server and which can be used by anyone for any non-commercial purpose. #COVID19 #COVID #CovidData Image
2/7 #JohnsHopkinsUniversity is widely regarded as one of the primary sources for authoritative COVID-19 data. Hopkins curates this data from various sources and hosts it on GitHub at
github.com/CSSEGISandData…
3/7 The #JohnsHopkins “timeseries” data is a *cumulative count* of cases and deaths. My code automatically runs each night and converts those cumulative counts into *daily counts*. I am hosting this daily count data in separate csv files per month.
Read 8 tweets

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