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New to The National Map Corps? Head over here for an overview of the project.

Mapping Challenges will be released periodically and are a way to focus volunteers on areas that need editing. The challenge is to edit the red points if you are Standard Editor and to Peer Review the green points within the challenge area released. Make sure to look for missing points too! Advanced Editors can edit any of the points within the challenge area. 

Volunteers who contribute in the Challenge area will be recognized on this page and also tweeted on The National Map Twitter account. Contribute to The National Map by participating in Mapping Challenges!

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titleMapping Challenge Update: City / Town Hall Structures in CO

8/22/19 -------------------------------------------------------------

Mapping Challenge Update:  Lightning Challenge for City / Town Hall Structures in Colorado 

Colorado is nearing completion, though there's still a few features that remain to be collected.  Here is an update map that includes incorporated places (small, gray polygons). 

We also performed a quick analysis to see which Denver suburbs have a point within their corporate limits (light gray) vs. those that do not (dark gray with labels); see the second map below for results.  Note that this is not a definitive list of what remains to be collected; it only shows the relationship between incorporated places (i.e., polygons) and city / town halls (i.e., points).  In other words, it's possible that some of these dark gray jurisdictions have already had their City / Town Hall collected but it does not fall inside the gray polygon.  It's also possible that some don't have a designated City / Town Hall building at all, and that's ok, too! The intent is to serve as a checklist of possible remaining features in the Denver Metro Area.  

Reach out to us at nationalmapcorps@usgs.gov with questions.


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titleMapping Challenge Update: City / Town Hall Structures in NJ, NY, & PA

8/22/19 -------------------------------------------------------------

Mapping Challenge Update: City / Town Hall Structures in New Jersey, New York and Pennsylvania

Here is the weekly update for this challenge.  Our Interactive Web Map can help locate those green points that need Peer Reviewed or Advanced Edited.

Several towns are coming in for Upstate New York, though there's still more to be added.  There's also a few in some of the central Pennsylvania counties that need to be added.  Check out the article titled Ensuring Data Completeness in our July 2019 newsletter for authoritative sources on how to locate these towns.  

Reach out to us at nationalmapcorps@usgs.gov with questionsThanks for all that you do, and Happy Mapping!



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titleMapping Challenge Update: City / Town Hall Structures in CO

8/15/19 -------------------------------------------------------------

Mapping Challenge Update:  Lightning Challenge for City / Town Hall Structures in Colorado 

Our volunteers never cease to amaze us!  The number of City / Town Halls in Colorado has more than doubled in the past week - nice work!  

There's still a few features that remain to be collected.  Here is an update map that includes incorporated places (small, gray polygons).  There's several suburbs of the Denver Metro Area that still need to be collected, too.  

Reach out to us at nationalmapcorps@usgs.gov with questions.


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titleMapping Challenge Update: City / Town Hall Structures in NJ, NY, & PA

8/15/19 -------------------------------------------------------------

Mapping Challenge Update: City / Town Hall Structures in New Jersey, New York and Pennsylvania

Here is the weekly update for this challenge.  Our Interactive Web Map can help locate those green points that need Peer Reviewed or Advanced Edited.

There's still several towns in Upstate New York that need to be added.  There's also a few in some of the central Pennsylvania counties that need to be added.  Check out the article titled Ensuring Data Completeness in our July 2019 newsletter for authoritative sources on how to locate these towns.  

Reach out to us at nationalmapcorps@usgs.gov with questionsThanks for all that you do, and Happy Mapping!



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titleNEW Mapping Challenge! City / Town Hall Structures in CO

8/9/19 -------------------------------------------------------------

New Mapping Challenge!  A Lightning Challenge for City / Town Hall Structures in Colorado 

Our current challenge in the Mid-Atlantic is nearly complete so we wanted to spice things up a bit with a Lightning Challenge!  

What is a Lightning Challenge?  

A Lightning Challenge is like our other mapping challenges except it has a smaller project area and shorter time frame.  

City / Town Hall Structures in Colorado

This challenge will focus on City / Town Hall structures in Colorado and will run through mid-September.  Approximately 200 points still need to be collected. USGS will be updating Colorado US Topo maps soon so what better time to offer a Lightning Challenge for this area!   

City / Town Hall structures in Colorado will primarily be found in cities and towns. Try looking at the smaller towns along the highways and roads for missing points.  Here is a Wikipedia article further describing Colorado’s governmental structure. Colorado’s Department of Local Affairs also offers census data by city / town, which may also be of assistance. 

There isn’t much existing city/town hall data, so many points will need to be added as new features. Check out this article titled Ensuring Data Completeness from our July 2019 newsletter for tips on how to collect a complete dataset from scratch. 

We’re also working on the interactive web map for this challenge as we speak, so check back often!

What about the Mid-Atlantic City / Town Halls Challenge? 

Our mapping challenge for NY, NJ, and PA is still open as of this post, so feel free to participate in either challenge!

Reach out to us at nationalmapcorps@usgs.gov with questions.


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titleMapping Challenge Updates

8/8/19 -------------------------------------------------------------

Mapping Challenge Update: City / Town Hall Structures in New Jersey, New York and Pennsylvania

Another 200 points have come in over the last two weeks.  Keep up the good work!  Our Interactive Web Map can help locate those green points that need Peer Reviewed or Advanced Edited.

If you're wondering how to tell when a county or state is complete, check out the article titled Ensuring Data Completeness in our July 2019 newsletter for some tips.  The article also contains pointers on additional sources.  

Reach out to us at nationalmapcorps@usgs.gov with questionsThanks for all that you do, and Happy Mapping!



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titleMapping Challenge Updates

7/25/19 -------------------------------------------------------------

Mapping Challenge Updates 

Another 200 points! Keep up the good work!  

Remember that we're collecting City / Town Halls throughout the entire U.S., so feel free to collect these structures in other areas as well.  Just note that only City / Town Halls collected within this geographic area will be recognized in the mapping challenge results. 

Interested in editing structures other than City / Town Halls?  Our Structure Finder can help locate points that need to be edited, so check it out!

Reach out to us at nationalmapcorps@usgs.gov with questions.


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titleMapping Challenge Updates

7/18/19 -------------------------------------------------------------

Mapping Challenge Update: City / Town Hall Structures in New Jersey, New York and Pennsylvania

Here's the current status of our mapping challenge.  All of the major cities are filling in, leaving some of the more trickier townships yet to be collected.  When deciding whether to collect a township or borough, a general rule of thumb to follow is this: if the jurisdiction (e.g., municipality, township, village, or borough) uses any level of "home rule" to provide governmental services to its residents, then these services are often administered from a common building.  If a building is used solely for these purposes, then it would be considered a City / Town Hall.  

Here's a few Wikipedia articles that better describe the governmental structure of each state: 

Be on the lookout for articles in our next few newsletters discussing this very topic as well.  Reach out to us at nationalmapcorps@usgs.gov with questionsThanks for all that you do, and Happy Mapping!



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titleMapping Challenge Updates

7/11/19 -------------------------------------------------------------

Mapping Challenge Updates 

More and more points are coming in, so keep up the good work!  Don't forget about townships; Town Halls are eligible to be collected under the City / Town Hall feature type and there are several townships throughout these states.  

Reach out to us at nationalmapcorps@usgs.gov with questions.


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titleMapping Challenge Updates

7/03/19 -------------------------------------------------------------

Mapping Challenge Update: City / Town Hall Structures in New Jersey, New York and Pennsylvania

Wishing a safe and happy 4th of July to our volunteers!  Don't forget to stop by the TNMCorps web editor between barbecues! 

Here's the current status of our mapping challenge with another 100 points added since last week.  Our Interactive Web Map can help locate those green points that need Peer Reviewed or Advanced Edited.  Keep up the good work!

Reach out to us at nationalmapcorps@usgs.govThanks for all that you do, and Happy Mapping!


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titleMapping Challenge Updates

6/27/19 -------------------------------------------------------------

Mapping Challenge Updates 

Points continue to come in for City / Town Hall structures in the Mid-Atlantic! Keep up the good work!

Reach out to us at nationalmapcorps@usgs.gov with questions.


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titleMapping Challenge Updates

6/20/19 -------------------------------------------------------------

Mapping Challenge Update: City / Town Hall Structures in New Jersey, New York and Pennsylvania

Another 100 points have been added since our last update!  Keep up the good work!

Reach out to us at nationalmapcorps@usgs.govThanks for all that you do, and Happy Mapping!


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titleMapping Challenge Updates

6/13/19 -------------------------------------------------------------

Mapping Challenge Updates 

Points continue to come in for City / Town Hall structures in the Mid-Atlantic! Keep up the good work!

Reach out to us at nationalmapcorps@usgs.gov with questions.


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titleMapping Challenge Updates

6/06/19 -------------------------------------------------------------

Mapping Challenge Update: City / Town Hall Structures in New Jersey, New York and Pennsylvania

Since our last update, it looks as though all of the seed data (i.e., red points) have been edited and confirmed!  Keep up the good work!

There's still plenty more to edit before this challenge is complete.  Remember that most of the points for this challenge will be added directly by volunteers.  And as you can see from the western portions of New York and Pennsylvania, there's plenty of City / Town Halls throughout these states due to their relatively long history with communities dating back to the colonial period.  

Reach out to us at nationalmapcorps@usgs.govThanks for all that you do, and Happy Mapping!


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titleMapping Challenge Updates

5/30/19 -------------------------------------------------------------

Mapping Challenge Updates 

Points continue to come in for City / Town Hall structures in the Mid-Atlantic! Keep up the good work!

Reach out to us at nationalmapcorps@usgs.gov with questions.


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titleMapping Challenge Updates

5/23/19 -------------------------------------------------------------

Mapping Challenge Update: City / Town Hall Structures in New Jersey, New York and Pennsylvania

Points are starting to come in for City / Town Hall structures in New Jersey, New York, and Pennsylvania! Keep up the good work!

Don't forget about the interactive web map for this challenge.  There's also the Structure Finder that searches for points throughout the entire U.S. 

Have a question about City / Town Hall structures? Check out our Q&A Forum to see if someone else had the same question.  A few entries for City / Town Halls have already been submitted: 

Not finding what you're looking for?  Submit a question and someone from the community will be glad to assist!  You can also reach out to us at nationalmapcorps@usgs.gov

Thanks for all that you do, and Happy Mapping!


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titleMapping Challenge Updates - Interactive Web Map Available

5/20/19 -------------------------------------------------------------

Mapping Challenge Updates - Interactive Web Map Now Available!

Here's the interactive web map for City / Town Halls in PA, NJ, and NY.  Be sure to check out its new functionality that allows users to turn layers off and on!  

Looking to edit elsewhere?  Our Structure Finder searches for points throughout the entire U.S.

Reach out to us at nationalmapcorps@usgs.gov with questions.


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titleNEW Mapping Challenge!

5/14/19 -------------------------------------------------------------

NEW Mapping Challenge! City / Town Hall Structures in New Jersey, New York and Pennsylvania

Since our volunteers are (star) amazing (star) and did such an awesome job collecting City / Town Hall structures in the DC area, we wanted to extend this effort up the eastern seaboard. This puts our next challenge focusing on City / Town Hall structures in New Jersey, New York, and Pennsylvania.

These states contain a large amount of historic architecture (especially NY and PA...), so check out our newsletters from July, September, and November 2018 for more on the different types of architecture one might encounter.

The tips and tricks for this challenge are similar to the DC Area, yet are worth mentioning again with a few updates (highlighted in italics):  

Incorporated Places

  1. Most of the City / Town Hall structures will fall within incorporated places. An incorporated place is an area that is governed by a local municipal corporation.
    1. Incorporated places in NJ, NY and PA may include cities, towns, or villages.
  2. There may be multiple City / Town Hall structures in each county.
  3. A good place to start is to search Wikipedia for a list of municipalities or incorporated places in each county. 
    1. Remember that these Wikipedia lists are only a starting point and are not an authoritative source.
    2. Therefore, as you work through the list to map each entry, be sure to confirm each feature with an authoritative source such as the city’s website.

Proper Point Placement

  1. There’s slightly more seed data (i.e., red, unedited points) for this challenge compared to the last, however most of the features for this challenge will still be collected from scratch.  
  2. Different incorporated places may share a building for their city/town hall locations. If so, add a point for each city/town hall. An example of this is the Rye Town Office which occupies space on the Third Floor of the Port Chester Village Hall in Port Chester, NY.
  3. Our November 2018 newsletter includes an article on aerial interpretation for City / Town hall structures. This article walks readers through how to find the correct building to place a point on when examining aerial photography.

We’re working on the Interactive Web Map for this challenge as we speak. We’ll post it on this page once it’s available, so stay tuned!

If you have any questions during the mapping process, reach out to us at nationalmapcorps@usgs.gov and someone will be happy to assist!  Thank you for all that you do, and happy mapping!



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titleMapping Challenge Updates - DC Area City / Town Halls Finished - Here are the results!

5/13/19 -------------------------------------------------------------

Mapping Challenge Updates - DC Area City / Town Halls FINISHED!!

Our DC Area City / Town Hall mapping challenge is now officially closed!!  A huge shout-out to all of our volunteers who participated in this challenge!  

Here is a time-lapse of our volunteer contributions:

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Overall, 15 volunteers combined forces and edited a total of 388 unique points throughout the challenge. Nice work!

Here is a summary of the edits by user role:

  • Standard Editor: 74

  • Peer Reviewer: 34

  • Advanced Editor: 495


Expand
titleClick here to see a full list of volunteers who contributed.

BekkaLucas

detour

FJD

geo163

kvaughan1974

matwaj

NWPerry

robwills77

RyanLIFireEMS

stuart

superlemur

TSDNAV

wangmengyao

We're currently working on putting together another mapping challenge, so check back often!  Reach out to us at nationalmapcorps@usgs.gov with questions.


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titleMapping Challenge Update - Courthouses

5/1/19 -------------------------------------------------------------

Mapping Challenge Update: Courthouse Review Complete!

Just as our volunteers have been busy helping us with various mapping challenges, we’ve been busy finalizing our review of courthouses.  We’re excited to say that our review is now complete!

Our results look very good with accuracy rates floating around 95% or above, so nice work!  We will soon begin work on an article documenting our findings, so check back often.

Here’s a time lapse of our volunteer contributions:

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In total, 151 volunteers collected 3984 unique points from scratch, which is awesome!

Here’s the summary of edits by user role:

  • Standard Editor: 1,400
  • Peer Reviewer: 237
  • Advanced Editor: 3841
Expand
titleClick here to see a full list of volunteers who contributed.

Abhi Kamerkar

affyvz

AKushner

aloama

Andrew Tscherne

angarone

awatters

azgeoscience

BekkaLucas

Birdman03

bkgrizzle

bolmarchivist

BriceCook27

brimcfarland

BruceLT

Bulbus

Buz Hopper

c snelbaker

Cartograsaurus

Cartograsaurus02

Cassie Tammy Wang

CCharle2

Cgibson

Charlie

checox

chfeng05

ChrisColeman

Christopher Vance

CynthiaLeigh

d_scott

David Lampen

DavidLSmith

derrickdgregory

detour

DonaldSeccombe

DrewKimura

eewhitejr

ejames2126

EricS54

Evanw

EvilHag

fconley

Frank_Z_NJ

funjabi

Gabrielle

GarBear

GatorGal

gdu3

genovt

geo163

GioJoe

granbyskier

HGeisler

hjk10

hyperbolejoy

irelynkiss

jafishe1

jbickeLSU

jhou

Jim720

jmlatane

jmpete92

johngaul

Joseph

jre323

jwvmedia

Karen

karl6109

katenjhs

Keep on Climbing

KentRobert

Kevin D

kf_webb

Kim L. Nelson

Kitepd68

Kit-Kat

klkweaver

ktomansager

lichenwangmap

lmoore_usgs

Matias Cabeza

MatthewEverett

mbryan06

MCHealy

MCotton

med

Micah Cochran

misterissippi

mjmckinley

MoeLuther

morenna

Morrilton Pathfinders

Mountains2Sea

msean21

MusicByTom

mwertsalesforce

n55w131

Nick D.

Outmoded

pasmann

pscordato225

RagingSeas

Raynbowe

rchlmrtn

RIsailor

RISailor

rjhale1971

rlf41

robwills77

ronniecupit

Rose Luzader

Ruchi Agarwal

RyanLIFireEMS

Samuel M Preciado Jr

schiffer6

ScubainColorado

seldom4

sheridangis

shwetjosh

SMOKEYSF

Soonie

SpotsyGISDave20

StevenChi

stuart

superlemur

tanveer08007

tbrasington

tbwill

Teri2115

theJordanabides54

Todd Lusk

todd-ruffino

tsando1

TUFFYJCW

USGSTaylor

virgilturner

wefjr7944

whtlinefvr

wla245

yinm988



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titleMapping Challenge Updates

4/25/19 -------------------------------------------------------------

Mapping Challenge Updates - So Close!!

City / Town Halls for the DC Area are SO CLOSE to being finished! This challenge has been open for approximately one month and our volunteers have already collected most of the points for this area; nice work!

We're working on a new mapping challenge as we speak. In the meantime, don't forget about the Interactive Web Map for this current challenge. It's a handy tool that helps our volunteers locate points specific to this challenge (i.e., like those green points in Maryland that need Peer Reviewed...). Users are also welcome to collect City / Town Halls elsewhere since we're collecting these features nation-wide.  

Reach out to us at nationalmapcorps@usgs.gov if you have any questions!


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titleMapping Challenge Update - Interactive Web Map

4/11/19 -------------------------------------------------------------

Mapping Challenge Update: Virginia is Getting Full!

Our volunteers never cease to amaze us! Virginia is seeing more and more points added each week with almost another 100 points added; Maryland and Delaware are getting full, too! Keep up the good work!

Note that there are still a few counties that have yet to have any City / Town Hall points added. There's also several standard-edited (i.e., green) points for our Peer Reviewers and Advanced Editors to verify.

Another important tip is to remember that many counties contain more than one city, so it is quite common for each county to contain multiple City / Town Hall points. A quick web search for each county (e.g., "Shenandoah County, VA") may provide a list of the cities in that county. Volunteers can then perform a second web search for each city listed to locate their city halls.

If you have any questions during the mapping process, reach out to us at nationalmapcorps@usgs.gov and someone will be happy to assist!  Thank you for all that you do, and happy mapping!



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4/4/19 -------------------------------------------------------------

Mapping Challenge Updates - Over 100 Points in the Last Week!

WOW - Our volunteers have been busy and this status update map shows! Over 100 new City / Town Hall points have been added in the last week! Keep up the good work!

Don't forget about the Interactive Web Map for this challenge. It's a handy tool that we developed to help users locate individual points (i.e., like that one unedited point in Delaware...).

Reach out to us at nationalmapcorps@usgs.gov if you have any questions during the process!


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titleMapping Challenge Update - Interactive Web Map

4/2/19 -------------------------------------------------------------

Mapping Challenge Update: Interactive Web Map for City / Town Hall Structures in the Washington, D.C. Area

Here is the Interactive Web Map for the mapping challenge!

If you have any questions during the mapping process, reach out to us at nationalmapcorps@usgs.gov and someone will be happy to assist!  Thank you for all that you do, and happy mapping!



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titleMapping Challenge Updates - More City / Town Halls Are Coming In!

3/28/19 -------------------------------------------------------------

Mapping Challenge Updates - More City / Town Halls are coming in for the DC Area!

It’s always exciting to see the blank portions of the map filling in during our mapping challenges!  Since we launched this challenge, several points have been added in the southwestern portion of Virginia along with a few more scattered points elsewhere.  Don’t forget those empty counties in Maryland... And of course there’s Washington, D.C. as well!

Reach out to us at nationalmapcorps@usgs.gov if you have any questions during the process!


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titleNew Mapping Challenge - City / Town Hall Structures in the Washington, D.C. Area

3/21/19 -------------------------------------------------------------

New Mapping Challenge! City / Town Hall Structures in the Washington, D.C. Area

Our new mapping challenge will cover City / Town Hall structures in the Washington, D.C. area and surrounding states.  

The area of interest for this challenge encompasses multiple states and/or districts including the District of Columbia, Delaware, Maryland, and Virginia. Keep in mind that we are actively collecting City / Town Hall structures nationwide, so you’re not limited to collecting just in this area. However, only edits performed within the challenge area will count towards the challenge.   

A fun aspect of this challenge is that those participating will have an opportunity to explore some historic architecture while contributing to The National Map! Check out our newsletters from July, September, and November 2018 for more on the different types of architecture one might encounter.

Here are some additional things to keep in mind while collecting City / Town Hall Structures in the Washington, D.C. Area:

Incorporated Places

  1. Most of the City / Town Hall structures will fall within incorporated places. An incorporated place is an area that is governed by a local municipal corporation.

    1. Incorporated places in the D.C. area may include cities, towns, or villages.

  2. A good place to start is to search Wikipedia for a list of municipalities or incorporated places in each state.

    1. Remember that these Wikipedia lists are only a starting point and are not an authoritative source.

    2. Therefore, as you work through the list to map each entry, be sure to confirm each feature with anauthoritative source such as the city’s website.

Proper Point Placement

  1. You won’t see a large amount of red (unedited) points for these structures,because there is very little pre-existing “seed data” that has been loaded into the editor. Most of the features for this challenge will be collected from scratch.  

  2. Different incorporated places may share a building for their city/town hall locations. If so, add a point for each city/town hall. An example of this is the Rye Town Office which occupies space on the Third Floor of the Port Chester Village Hall in Port Chester, NY.

  3. Our November 2018 newsletter includes an article on aerial interpretation for city / town hall structures. This article walks readers through how to find the correct building to place a point on when examining aerial photography.

We’re working on putting together an Interactive Web Map for this challenge as we speak, so check back often!

If you have any questions during the mapping process, reach out to us at nationalmapcorps@usgs.gov and someone will be happy to assist!  Thank you for all that you do, and happy mapping!



Looking for previous updates? Click here to check out our Past Mapping Challenges.


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