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Flawed Map Says L.A.'s Crime Highest Next to Police HQ

CNET briefly describes how a poorly chosen default behavior has led to an online crime map of Los Angeles (on a site designed at a cost of $362,000) that shows that "a location just a block from the department's new headquarters is the most crime-ridden place in the city." I wonder how often this sort of error would completely skew things like real-estate maps that attempt to show whether houses in a certain neighborhood are worth more than those in the one next door.

37 of 123 comments (clear)

  1. Quick! by palegray.net · · Score: 4, Funny

    Get those properties while they're cheap! Well, cheaper than they already were, considering the economy.

    1. Re:Quick! by samriel · · Score: 3, Funny

      And I posted anonymously so you couldn't tell who I am! Ta-ta!

      -jcr

      That's some mighty fine detective work there, Lou.

    2. Re:Quick! by palegray.net · · Score: 2, Informative

      I think the mods missed the joke :).

    3. Re:Quick! by Divebus · · Score: 2, Funny

      Are L.A. cops THAT crooked?

      --

      Most of the stuff on /. won't survive first contact with facts.
    4. Re:Quick! by palegray.net · · Score: 4, Interesting

      Is that a rhetorical question? Can't speak for L.A., but my car suffered an attempted break-in via the windshield of all places while Sacramento cops sat in the parking lot of a La Quinta motel. I was traveling from Washington to Georgia, and got nothing more than a shrug and a "that sucks" from the police when I noticed the prised up seal on my windshield the next morning.

  2. Perhaps criminals are getting more brazen by superyanthrax · · Score: 5, Insightful

    More seriously, they should probably have had the program throw an error in case they could not find a certain location rather than putting the crime report at an arbitrary location. That would have caused the problem to be discovered earlier.

    1. Re:Perhaps criminals are getting more brazen by Kjella · · Score: 2, Informative

      More seriously, they should probably have had the program throw an error in case they could not find a certain location rather than putting the crime report at an arbitrary location. That would have caused the problem to be discovered earlier.

      There's pros and cons... What if you know the police district and want to give corrent district values, even there's no specific address? If not providing an address makes the crime "go away", there could be a tendency to have more "unlocalized" crime. Probably it was a case of conflicting requirements that said all crime was to represented and all crime had a location that nobody really thought through.

      I think your suggestion is unrealistic because sometimes there's no one good address. If you caught a speeder that you chased for three city blocks, was it the address you first observed the crime? Where he rammed that car in the chase? Where the chase ended? What if that's an intersection with no real address? Closest address? GPS coordinates? It's not relevant to the case what building was closests, and it'd be a waste of time coming up with rules just because everything must have an address. Still it would be relevant to know the general area for other statistics.

      --
      Live today, because you never know what tomorrow brings
    2. Re:Perhaps criminals are getting more brazen by Trepidity · · Score: 5, Insightful

      There's ways to balance that, depending on what your needs and visualization methods are. For example, if you know that a significant proportion of your crime reporting gives only district-level precision, not pinpointing to specific addresses, then it'd be more honest data presentation to just produce a colored-in map on a district-by-district level, and not attempt to give more detailed maps. If you do still want to give the more detailed maps, then at least average the un-localized things across the district instead of putting them all in one place.

      To use an actual (fairly simple) example that came up in my work recently: say you have some date figures, most of them with years but some only with decades. The wrong thing to do is to put the "1960s" datapoint at 1965, because then you get spurious spikes in the middle of every decade. Several more correct options are: just produce decade-by-decade visualizations, or else produce year-by-year visualizations, but assign a "1960s" datapoint as a 1/10-weight datapoint in each of 1960 through 1969.

    3. Re:Perhaps criminals are getting more brazen by CAIMLAS · · Score: 4, Interesting

      It is actually plausible that crime is higher by a PD. Consider that police operate effectively largely on the basis of force projection. Projecting force means they've got to spread out and, in part, create a perimeter within which they operate. The PD may have relied upon the force projection (ie the psychological influence the building would have) of the building, in part.

      Also consider that a PD is more of a hub; police officers are coming and going to their respective patrol areas, going and coming off of shift. They are most likely not thinking "work" - ie, find criminals - at this time.

      The PD may have been strategically placed where it was to dissuade crime in that specific area. I know that in the two largest cities in my state, the PDs are at, or near, the epicenter of low-income and crime (they're also just off the city centers). I lived near one of these PDs once, and it was indeed a higher crime area.

      --
      ~/ssh slashdot.org ssh: connect to host slashdot.org port 22: too many beers
    4. Re:Perhaps criminals are getting more brazen by Tuoqui · · Score: 2, Funny

      I'd like to think that it's more cops getting busted for their own abuses but I'm not that naive.

      --
      09F911029D74E35BD84156C5635688C0
      +2 Troll is Slashdot's way of saying groupthink is confused
    5. Re:Perhaps criminals are getting more brazen by Martin+Blank · · Score: 2, Interesting

      My parents used to cruise and street race in Southern California, and the preferred place to do it was about a block from the police station. The reason was simple: aside from shift changes (times for which were well known), there were no cops there. They were deployed far enough away that the racers only rarely saw a patrol car in the area, let alone on the racing street itself.

      --
      You can never go home again... but I guess you can shop there.
    6. Re:Perhaps criminals are getting more brazen by belg4mit · · Score: 3, Informative

      Choropleths are dangerous because most amateurs don't plot density.
      The eye naturally integrates over an area of uniform color, and so
      you must not create maps of raw magnitude if the mapped regions
      vary (significantly) in size. Otherwise, a small area of high-crime
      will appear less significant than a large area of moderate crime.

      --
      Were that I say, pancakes?
  3. Flawed? by MindlessAutomata · · Score: 4, Funny

    Seeing how rogue so many police officers are, it might not necessarily be quite off the mark.

    1. Re:Flawed? by pjt33 · · Score: 4, Funny

      What do you mean, "not quite off the mark"? It's a whole block out!

  4. Criminal activity detection... by RyanFenton · · Score: 5, Insightful

    It's not a legally recorded crime unless someone is caught and convicted. It's not surprising that these crime maps would show this result - the places that police officers are most likely to be, are the places where the most crime is "found".

    This is akin to saying that the places where the most vehicular crime occurs are where speed traps and automated traffic cameras are located.

    If you had a world with absolute and omnipresent law enforcement, and that society could somehow actually function, my guess is that the map would match a map of the average human traffic in a given location.

    Ryan Fenton

    1. Re:Criminal activity detection... by Jurily · · Score: 2, Interesting

      It's not surprising that these crime maps would show this result - the places that police officers are most likely to be, are the places where the most crime is "found".

      Are you implying police officers commit the most crimes?

      No joke, there are places where this is believable.

    2. Re:Criminal activity detection... by samriel · · Score: 2, Informative

      It's not surprising that these crime maps would show this result - the places that police officers are most likely to be, are the places where the most crime is "found".

      Are you implying police officers commit the most crimes?

      No joke, there are places where this is believable.

      That's not what he's saying. He's saying that, in places without cops, no crime gets reported. No cops = no arrests, ergo no crime information about the area.

    3. Re:Criminal activity detection... by megaditto · · Score: 2

      I was mugged; I reported the crime. (No fun at all, but at least they didn't shoot me.)

      Who "they," the muggers or the cops?

      --
      Obama likes poor people so much, he wants to make more of them.
  5. Not Phoenix then? by Midnight+Thunder · · Score: 2, Interesting

    Wow, and after reading about the police in Phoenix, I almost wondered whether the heading was wrong.

    --
    Jumpstart the tartan drive.
  6. OT - thanks for SimCity tag! by TJamieson · · Score: 4, Interesting

    For those who never played SimCity 4, it has a very strange bug where you would be notified about a "crime den" (implies high crime). However, when you went to the area being described, it was 99% of the time directly next to your police station.

    Fortunately, it only lasted as a blip -- no increased crime, but still rather goofy.

    --
    For the last time, PIN Number and ATM Machine are redundancies!
    1. Re:OT - thanks for SimCity tag! by Kjella · · Score: 2, Informative

      Or the mysterious corner of the airport...

          Of course, it's common knowledge that every murderer, rapist, tagger, and druggie goes to the corner of the local airport to commit their crimes.

      Clearly it's the corner of the Executive Lounge. You just think it lacks realism.

      --
      Live today, because you never know what tomorrow brings
  7. Wrong picking by gmuslera · · Score: 3, Funny

    All know that the highest crime locations always are in legislative government institutions, not in police stations (police choose to do their crimes far from there).

    Wonder if US highest crime is geolocated in Washington.

  8. Statistics, statistics... by jareth-0205 · · Score: 4, Interesting

    I know maps like these are a problem in the UK for a different, systematic reason: Crimes detected at the police station after an arrest have their location marked as having taken place at that police station. eg if someone is arrested and taken back to the station, and when asked to empty their pockets drugs are discovered, then the location of that crime is in the police station building. Of course, this sort of thing will happen every day...

    Makes the crime map a bit interesting...

  9. Seem like a no brainer... by __aaclcg7560 · · Score: 4, Insightful

    Would you build a new police station in a crime-infested neighborhood or in a rich neighborhood that would complain about the criminals that police bring in?

  10. Do you live in LA? by Amazing+Quantum+Man · · Score: 3, Informative

    That's not a mistake. In LA, most of the HQ's *are* in high crime areas.

    Downtown, Van Nuys, etc...

    --
    Fascism starts when the efficiency of the government becomes more important than the rights of the people.
  11. Re:Rape by claysdna · · Score: 3, Funny

    Men cannot be raped and blacks cannot be racists. It is written into the democratic partys national charter, accepted by all major news outlets, and become generally accepted politically correct behavior.

  12. Er... by mutube · · Score: 3, Insightful

    Isn't it a good thing that the police station is close to an area of high crime? Would we rather they were really far away?

  13. At least by HalAtWork · · Score: 2, Funny

    Well, at least they're not too far off.

  14. Geoprocessing errors are common by Anonymous Coward · · Score: 2, Interesting

    I'm an ArcGIS user who spends time coding geographically referenced data. On occasion, I process traffic crash locations. I don't work work for LA, and have no special knowledge of their process. But from my experience...

    It is quite common to only get a 90 to 95 percent match to a location with a fully automated system. Spelling errors, wrong street prefixes (N instead of S), wrong zip codes, wrong cities, etc. are all things that will cause a bad location.

    For the 5 to 10 percent that fall out, we have a routine that recodes based on a) county, then b) city, then c) street.

    For the last 1 percent, the locations are physically located by hand.

    As you might imagine, each step in the process takes effort and human touches to code correctly. If you don't have the time or the staff, a default location may be superior to 'location unknown'.

  15. $362,000 by ortholattice · · Score: 4, Insightful

    Is this a reasonable price for what seems to be an interface between google maps and the dept's crime database? Somehow it seems to me that a motivated person could do the basic design and coding in a few days. Then add in user feedback, layout redesigns ,etc., but still, should it really take even a couple of months for one person? As a crude guestimate, I would probably feel a little greedy or overly conservative bidding 6 months, of course I don't know the spec or what's really involved. What am I missing that seems to imply two person-years or more of work?

    1. Re:$362,000 by BikeHelmet · · Score: 2, Informative

      It has to meet strict security guidelines and undergo expensive independent security audits before it's approved for use?

  16. Re:What's the problem? by russotto · · Score: 2, Insightful

    It's hard to imagine a software glitch causing this exact behavior.

    Ever enter an address into an on-line mapping program that it didn't recognize? They'll often show a map at a default location at the center of the zip code you entered. Same idea here.

  17. No Doubt by Joebert · · Score: 2, Informative

    I'd have no reason to doubt it. When I lived in Shalimar Florida someone robbed the bank that's right across the street from the police department with a shotgun and weren't caught for as long as I lived there.

    --
    Wanna fight ? Bend over, stick your head up your ass, and fight for air.
  18. Actually,,, by fireheadca · · Score: 4, Funny

    The map is accurate for the most part, it's just a block off.

  19. Baltimore by N3Bruce · · Score: 3, Interesting

    Here in the Land of Pleasant Living (and also the setting for Homicide and The Wire), Baltimore's main Police HQ is set between President, Fayette, Gay, and Baltimore Streets. For those of you who aren't familiar with the area, the corner of Gay and Baltimore Street is one end of the city's infamous and long standing red light district, and Police HQ backs up to the heart of "The Block". One side of Baltimore Street are strip clubs and streetwalkers, along with the ever-present junkies, pickpockets, and pimps. The other side is the back of Police HQ, and parking is reserved for squad cars of Baltimore's Finest bringing in Baltimore's Worst at all hours of the day and night.

  20. LAPD by OrangeTide · · Score: 2, Funny

    Is it because they are counting the staff at the LAPD as criminals?

    --
    “Common sense is not so common.” — Voltaire
  21. Don't get me started by conureman · · Score: 2, Informative

    Amongst my several different experiences with the incompetence and criminality that is the LAPD, they were perusing my belongings one day whilst I was locked in the back of one of their cars. They got pretty excited about a crate of Thompson smg magazines &c. that I had. Once they determined that I hadn't committed any crimes they could prove and went away, imagine my surprise to discover that one box of .357 and two boxes of .45 caliber Black Talon ammunition had found a new, better qualified, owner. When the shmoogs set fire to the shopping centers and called it an "uprising", I didn't condone it, but I understood what they were talking about.

    --
    The cost of that cleanup, of course, will be borne by taxpayers, not industry.