Things to See and Do
Things to See and Do. On the Missouri Census Data Center Web Site JGB, May, 2008. What to Look For. MCDC Highlights (home page news) Access to data from the Census Bureau and other public sources Specializing in Missouri data, but - PowerPoint PPT Presentation
Things to See and DoOn the Missouri Census Data Center Web SiteJGB, May, 2008What to Look ForMCDC Highlights (home page news)Access to data from the Census Bureau and other public sourcesSpecializing in Missouri data, butMost of our more current data are available for the entire USMany dynamic web apps that let you select the exact data you wantLarge data archive accessible via web query tools (Uexplore/Dexter) Be Sure Not to MissMABLE/Geocorr geographic utilityMCDC Mapper dynamic map application(s)Population Estimates: page/web apps (including pop projections for Mo)American Community Survey (ACS) pageACS Profile reportsThe Questions/Comments buttons at the bottom of most pages.What (Some) Users Tell Us About SiteIts not that easy to use for first time or casual users.There is quite a bit of jargon & acronyms: SFs, ACS, PUMAs, MOEs, BEA, dp3_2k, sample vs complete count data, block groups, The profile reports are very helpful and are well-documented. You can get data here you cannot get anywhere else, but you have to know where & how to look.The A to Z index needs work. What (Some) Users Tell Us (2).I would rather eat glass than try to figure out what Uexplore/Dexter is all about.Disappointed to learn that so much of your data is so old (2000 census)You should do more maps and charts. You dont really expect anybody to read all those Readme & Usage Notes files, do you? Uexplore/Dexter is the coolest app on the web (except maybe for geocorr). Common Misconceptionsabout the MCDC web siteAll you have is (decennial) census data.All you have is data for Missouri.You guys can tell me what all the data mean and can even do economic forecasts over the phone. You have current data for census tracts and ZIP codesThe MCDC site is really just OSEDA with a different set of style sheets. Quick Links Navigation BarDisplayed on the right side of most MCDC web pagesACS Profile Reports (2006)Currently (it changes over time) the first entry in the Quick Links navigation box. ACS=American Community Survey. The ACS is like a decennial census, only every year and with MOEs.MOE=Margin Of Error, a measure of the limitations of the data due to sampling error.Modeled after the Data Profiles available from the AFF (Census Bureau) web site.You select up to 4 areasAnd the profile report magically appearsFeatures of the ACS Profile Reports4 broad-subject sub-profiles (D/E/S/H)Multiple areas makes comparison easier.Note the Move cursor over a value for one second .. directive. Try it. (Does not work if window does not have focus.)Note that we have Numbers and Percents. Compare this with Data Profiles from AFF.Try clicking on one of the table titles. Note link to a Usage Notes page. Its a Feature, Not a BugThe values in the report are displayed in 3 different styles.Bold, normal and nearly invisible.Where would you go to find an explanation? Hint: Where would you never go unless you were absolutely desperate? RTFUNRead the friendly Usage Notes.Features of the ACS Profile - 2Lots of links: to metadata, to data archive, to main menu page, to charts , etc.An entire row of links at the bottom of the page. You should try them all at least once. Note that one of the links will take you to the ubiquitous Dexter. Excel users can do a Select-all/Copy/Paste sequence to convert the report to an Excel spreadsheet.SF3 Profiles: Our Best SellerSF3 ProfilesOld-style drill-down menu system to select a single geographic area.Slight Missouri bias: more geog. levels available for MO; KS and IL also have more (census tracts and block groups).Data is based on the 2000 Census, something the Bureau calls Summary File 3. Code name is dp3_2k profile (data profile based on sf3, 2k census).Sf3 Profiles: The Missouri menu pageSF3 Profile Features, NotesGets the most hits of any of our dynamic web apps. About 20,000 hits per month in 2007. Has many features similar to the acsprofile app. Like links to a Usage Notes page and a similar related links bar at bottom.SF3 tables column contains drill-down links. Try clicking on the P87 link in table 22. PovertyDrill down on the P87 Table LinksIf You Enjoyed SF3 Profiles.We have others that are similar.We have trend profiles that display data for two points in time (censuses).We have data based on SF1, also a meaningless acronym.For details follow the Profile Products (2k) link in the Navy Blue Navigation Box.Circular Area ProfilesWhat is CAPS? CAPS (circular area profiling system) is a dynamic web app where the user fills out a form identifying a point (typically based on an address or street intersection) and 1 or more radii of concentric circles. The program tries to approximate the circles based on the center point and radii by choosing all small geographic areas whose centroids fall within the circle. The census data for these small areas is aggregated and the results displayed in a report that has the same content as our sf3 (dp3_2k) profiles.Notes re CAPSNot very accurate for small circles (CAPS web pageSample CAPS reportInterested in gory detail? Then Detailed SF3 ProfilesShould be of InterestFrom the 2nd menu page choose the city and the profileMCDC/OSEDA Missouri County Data MapClick on Jackson county to get this Missouri County Data MapIs just a front-end for the applinks dynamic web application for Missouri counties.There are many applications you can invoke on the web where the URL can be readily derived from an areas FIPS code(s).Most of the links are to our stuff, but several important ones are not. If we could get the world (and the Census Bureau in particular) to create URL-able web applications we could link to much more. Clicking on the acsprofiles link takes us to where we came inSuggested exercises for would-be data literate persons (especially Missourians)Choose your favorite county off the Missouri county data map.Follow every one of the application links, even the one to Stats Indiana. Be sure to follow all the links to usage notes and other online help pages associated with the applications. (fat chance) Even follow the 2 links at the bottom.Tell your friends/colleagues; e-mail the link. Applinks Master MenuYou can get here from our Quick Links box. Its just below Mo County Data Map.Use the latter (MCDM) if you just want apps for Missouri counties. Use the Master Menu when you want a different kind of geography or a state other than Mo.Note that we have included the usage notes right there on the main menu page. (Saved you a click!)Took us 3 clicks to get here:Note That We have a different list of applications for this non-Mo place. Applinks has logic built in to know which links should work.Note links at the top of page to parent geography (US >> Illinois), and at the bottom to a menu of sibling geography (other places in same state).Follow the link to Illinois. Note the menu bar at the top of the state page that takes you to menu pages for 4 kinds of sub-state geography. Geography at the MCDCIs very important. It is one of the house specialties. For the most part, we are talking about census geography, i.e. geographic entities recognized by the Census Bureau and used in their data products. We start here with two Quick Links and later well see two more key links, including one to a sophisticated GIS-based site. (MCDC Mapper)MABLE/Geocorr(2k)A user favorite since 1996.Geographic utility that generates lists of geographic codes/names and shows how different layers are related. Uses algebra instead of geometry.The (2k) refers to the current version that uses 2000 census blocks as the underlying basic unit. There is also a 1990 version. (Linked to)Some Things Geocorr Can Do List every county in 12 states with their FIPS codes and tell you what metro area they are in, if any.List every ZIP code (ZCTA) in Missouri and tell you what portion of it is rural. Create an Excel file for the entire U.S. showing how counties relate to PUMAs.Generate a list of every CBSA (core-based statistical area) in all or selected states and show their 2006 estimated population.To Learn More about MABLE/GeocorrIt has its own ppt tutorial, linked to from the application page.MABLE is the underlying database used by the geocorr engine. The MAGGOT file (linked to just above the twin Geocode select lists) provides background info re all the geographic units. The help and examples pages are linked to from the application page as well. A Cure for the Common Codes Nothing complicated. Just a handy place to go for all your geographic coding needs.A menu page with Usage Notes and links to the geocode pages for each state and for the U.S.End Quick Links PortionFor more things to see and do see the NB2 portion. John Blodgett, OSEDA, May, 2008These are all worth checking out to see if they are of interest. Obviously, it all depends on what youre looking for or are interested in.The Questions/Comments buttons reflect the fact that the web site is interactive in more ways than just having cgi-bin applications. There are also people who are paid to respond to questions regarding the data and the applications. Our web site allows users wholesale access to data that is not readily available from other sources, such as the AFF. In many cases this accesses requires the user to be able to used the data archive via Dexter, something that not all users are willing/able to do. We have an item in the annual work plan just about every year that says we shall work on making major improvements to the A to Z page. But it is a big job and it is hard to find someone with the writing and reference librarian skills to go along with an in-depth knowledge of what to point to. Sometimes we get conflicting feedback, as with the Uexplore/Dexter comments here. Different people like different things. OSEDA is an acronym for the Office of Social and Economic Data Analysis. This is the office within the University of Missouri where the author works. The MCDC is independent of OSEDA. On some pages the QL navigation bar appears on the left side, below the Navy Blue Navigation Bar. This is what it looked like when we did this slide (May, 2008). Subject to change at any time. The 2006 will change as well when we get later data. This is the pre-profile page where you get to select up to 4 geographic areas. Mix and match at various levels. E.g. pick a city, 2 counties and a state, Or, 3 states and 1 nation. A window has focus if its the current window. Easiest way to make it the current window is to click on it. The way to lose focus to open a new window or click in another window. AFF=American FactFinder ACS=American Community Survey D/E/S/H=Demographic/Economic/Social/Housing.Tradition has it that no user will ever bother to read a usage notes page, especially if is not really a page, but rather a document with sections and lots of plain text. But if you dont read them then you may never understand why some of the values in the report are barely readable, some are in bold, and some are just regular. Hint: see the paragraph on Showing Statistical Reliability of Numbers. Re having both numbers and percents, consider that you cannot get a count of poor persons from the AFF economic data profile report just the percentage. There were 20,348 estimated poor persons in Boone county in 2006 but you cannot find this number in the AFF report. RTFUN Read The Friendly Usage Notes. Ubiquitous: existing or being everywhere, esp. at the same time; omnipresent.There is a single data file within the archive where data for all geographic areas is stored. The link at the bottom invokes Dexter with this data file (sas dataset) pre-selected and ready to be queried. The Excel file that you get with the copy/paste will need a little formatting work to make it look right. The column labeled Base Table(s) is reserved for future use. In other comparable profiles based on the 2k census this column was used as a drill-down link to view more detailed data related to that being shown in that row. We monitor usage of our dynamic web applications. The sf3 profile application has had by far the most invocations of any since it was created in 2002. Even with the data getting older, it is still considered something of an industry standard. The majority of accesses to these are not via the drill-down menu system. Rather, there are direct links from other web pages, such as our applinks pages and the Hometown Locator site.Note all the custom tabulations done only for Missouri. We aggregated census data for small geographic areas (block groups) to create these summaries. Profile has most commonly-requested data from the 2k census based on long form questionnaire. Over 200 variables, not counting percentages. The table in the profile had data related to poverty rates that was derived from this complete SF3 table. The link just invokes a utility application that displays the complete table. This is what we hope to emulate with the ACS tables starting with 2007 data. SF1 stands for Summary File 1. It is a set of tables based on data collected on the short form in the 1990 and 2000 census. The data are pretty basic but you can get it for very small geographic areas, all the way down to the census block. The Navy Blue Navigation Box is, of course, that navy blue box that appears to the left of most MCDC pages.CAPS is an acronym for Circular Area Profiling System. Whats a dp3_2k profile? Thats the technical term we use for the SF3 profiles that we talked about earlier. The standard demographic profile form the 2k census data as reported on Summary File 3. Like almost all of our online applications, it has a link to a Notes page where details are explained. Looks just like a dp3_2k report but does not use the 2-panel (newspaper style) layout. This is one of a set of very detailed profiles that were generated based on the Summary File 3 data from the 2k census. Programming was done by a team made up of State Data Center agencies around the country. Click on the link in the first row, 3rd column to get the next menu page. We click on the line (_p_) in the row for Columbia City. The resulting profile is where we came in, 4 slides back. A map-based menu page. Adapted from model created the the GRC at UMC. Our first look at the applinks utility application. You pass it geographic parms and it displays a menu page like this which lets you access many geography-specific web apps. our stuff is a technical term referring to web pages/applications that were created by the Missouri Census Data Center and can be accessed on our web site. URL-able means an application that can be invoked with parameters that take you right to the results for a specified geography. Most of the reports you can get from the Census Bureau are not like that you have to navigate their front-end pages to get to the reports. If you are unfortunate enough to be from DeKalb or some other trivial Missouri county (with less than 65,000 population) then you will be disappointed (or encouraged, depending on your POV) to discover that there is no link to the acsprofiles app. Because there is no ACS data in 2006 for geographic areas of < 65,000. You may skip item 3 on the first pass, but schedule some Saturday to do this, at least for the applications you see as relevant. We sometimes have to generate links to applications that may not actually work. For example, the socds application only works for cities that are in metro areas. The applinks program does not have a way of determining if the place code passed to it is a city within a metro area. So it just generates the link and hopes the user will understand that it will not work for non-metro towns. Note the links to US and Illinois at the top of the page (following Level:). Makes it convenient to go up in the geographic hierarchy. Note also the link at the bottom, which lets you go to a menu of siblings, in this case other places in the same state. We do a lot of things with geography that do not directly involved maps or GIS. But one of the MCDC core agencies is the Geographic Resources Center at the University of Missouri and they are an advanced GIS shop. The MCDC Mapper link (in the Navy Blue NB) takes you to a page where their applications reside. NB2= Navy Blue Navigation Box. The other nav box on most MCDC web pages.