00:01It gives me great pleasure to introduce Lauren Rosenshein.
00:04And Lauren is a geographer, a quantitative geographer.
00:09She's just recently got her master's degree and is working in the world of spatial analysis/spatial statistics.
00:17The demo that she's going to give is not exactly relevant to geodesign, but it's totally relevant to geodesign.
00:25She's going to talk about sharing tradecraft, sharing what one person creates and allowing other people to use it...
00:33...and then resharing it, et cetera.
00:40So I'm a crime analyst in San Francisco, and I've got data on all the points that represent crimes for the last year in my area...
00:50...and my boss has asked me to do a hot spot analysis.
00:54Unfortunately, I have no idea how to do a hot spot analysis.
00:58So, what I want to do is rely on the community.
01:01I know that there are a lot of analysts out there, crime analysts, who specialize in this sort of thing...
01:06...spatial statistics/geographic analysis, and I know that they're out there sharing their methodologies, their tradecraft...
01:13...so as an analyst, I want to go and take advantage of all the work that they're doing.
01:17So what I'm going to do is I'm going to go out to ArcGIS.com, and I'm going to search for crime analysis.
01:26And one of the things that pops up here is a group.
01:28I was searching specifically for groups, and it's a crime analysis collaboration group.
01:32So I'm going to dig in here and I see some things that people are sharing.
01:35I'm seeing data templates.
01:37I'm seeing web applications.
01:39And I also see this DC crime hot spot analysis workflow.
01:44So when I dig a little bit deeper into this workflow...
01:46...what I see is that the DC crime analysis unit has shared a geoprocessing package.
01:53That package is going to walk me through the workflow and it also provides the data necessary...
01:58...for me to analyze patterns and find hot spots of violent crime in Washington, D.C.
02:03So while I'm not interested in hot spots in Washington, D.C....
02:07...it's definitely going to get me on the right track to doing this same analysis in San Francisco.
02:12So what I've done is I've downloaded that geoprocessing package, and I already have it on my machine.
02:18And all I'm going to do is drag and drop that geoprocessing package right into ArcMap.
02:23So, two things happened when I dropped that into ArcMap.
02:27The first thing I noticed is that some data was added to my table of contents.
02:31And the second thing I noticed is that a new tasks node here was added to my Analysis window...
02:36...and that task is the crime hot spots task that I just added in and that includes the tool itself which I can run.
02:44It also includes some associated files.
02:52So if I zoom to that layer, I can see what...really what this geoprocessing was all about.
02:58I see those crime points that those analysts used to do their hot spot analysis...
03:03...and I also see the hot spot surface that they created, and I know this is exactly what my boss is looking for.
03:10This is what the decision makers want to see as far as what a hot spot analysis is.
03:14So, what I want to do is use this same methodology on my own data.
03:20So I'm going to go back to San Francisco, and before I dig in and try to run the analysis, I first have to learn about it.
03:28And one of the things that the geoprocessing package allows me to do...
03:32...is create and associate some files with that geoprocessing package.
03:37So one of the things that the crime analysts in DC did was they incorporated a PDF...
03:42...and that walks me through what this hot spot analysis workflow is all about.
03:47So if we look through there, we can get a better idea of what the model is, and we can see piece by piece what it does.
03:53So it starts by selecting some of those crime incidents...
03:56...both by a location so I can choose just to look at a particular area of my data...
04:01...and also by the time of day which is interesting.
04:03I know that analysts often want to see just nighttime crime or just morning crime.
04:08I also see that that's done interactively...
04:10...and what that's going to help me understand when I start to run my analysis what that part of the tool is all about.
04:17It then runs a hot spot analysis, tells me about some of the parameters that were chosen...
04:23...so that I can trust the parameters that they chose because they're explaining their methodology here...
04:28...and then ultimately creates that hot spot surface.
04:31So now that I understand a little bit more about it, what I want to do is dig in here and run that analysis.
04:38So all I have to do to run the analysis is double-click on that task, and instead of using that DC crime data...
04:44...I want to point to my own San Francisco crime data.
04:48Now I can interactively choose the location and the time of day.
04:51So by choosing this nighttime option here, when I draw this polygon on my map...
04:57...I'm not only just looking at crimes in the northeast quadrant of San Francisco...
05:01...I'm also only looking at the nighttime crimes that occurred in that northeast quadrant.
05:05So I can get really specific about the analysis that I'm doing.
05:09And then I just run my analysis.
05:12And with really very simply, without having to learn a whole lot about hot spot analysis, I can run it...
05:18...and I know that I can trust those parameters that were set because the DC crime analysts explained their methodology.
05:24I can feel confident about those results.
05:26So when I take a look back here, I'll turn those points off...
05:35So that's really great.
05:36But I have some ideas for how I want to improve this model.
05:39So, another really important aspect of a geoprocessing package is this isn't a static service.
05:45I'm not running this from the web.
05:47I'm a professional GIS analyst.
05:48I want to dig in there and change it around so that it meets my needs.
05:53So what I can do is right-click and edit this, and it's going to bring me right to the full model.
05:57I can go in here.
05:58This isn't a picture, it's in ModelBuilder.
06:00I can go in, change the parameters that I want to.
06:03One of the things that I want to do is not only allow analysts to choose by location and time of day...
06:08...I also want to give them an option to do a date extent.
06:11So in this case, we were looking at only November crimes.
06:14But I know analysts often want to look at the spring, summer, fall, and look at differences in that sort of way.
06:19So I want to allow users to have that sort of ability to query the data.
06:24So what I'm going to do is go in here and create a variable, type string, and go in here and set a default date for November 1st.
06:35And rather than going through and adding another variable and ultimately editing a SQL query...
06:41I've already gone ahead and improved that model for my own analysis.
06:46I'll just show you what it looks like here, and you can see the small changes that I made.
06:49I made the SQL query not only look at time of day but also that start date and end date.
06:55And now I can just go ahead and run that analysis.
06:59It's going to look really similar to the one that DC provided.
07:02Now I can also set the start date and end date.
07:05In this case, let's look at October through November and maybe we're interested in morning instead of nighttime crimes.
07:13So just go ahead and I run it, and I've made those small improvements...
07:17...that really make this fit what my decision makers in San Francisco are looking for.
07:23So we can see if I turn off the original one that now this new hot spot map has been created using my changes.
07:30So now that I have a model that's working.
07:32It ran successfully.
07:34I feel confident that's going to work when I share it with somebody else.
07:37I can go in here to that result, right-click on it, and have some options for sharing it.
07:42So I can share it as a geoprocessing package, or I can share it as a geoprocessing service.
07:47So to start with, we'll look at that geoprocessing package really quickly.
07:50And all I have to do to share this as a geoprocessing package is choose a location to save it.
07:55Let's call it Date Extent Geodesign, and then I have an option to include some attachments.
08:05So it's really important to remember how vital that PDF, that attachment, that methodology was to this geoprocessing package.
08:11It was really the meat of the geoprocessing package to me in terms of learning more about this analysis.
08:19So I've gone ahead and I've made some changes to update it for the changes that I've made.
08:23I've created a new PDF.
08:25Then I have some options for if I want to change the names of my inputs and my outputs...
08:28...that sort of thing so that ultimately it fits what an end user would expect.
08:33And then I just go ahead and share it.
08:35So when I share it, what it's going to do is it's going to take all my input data.
08:38It's going to take my output data.
08:39It takes that PDF and my model including any embedded models.
08:45If I had models inside of models inside of models, it would grab all of that and put it into this geoprocessing package.
08:51And from that package, I can send it in e-mail, put it on a shared folder, and obviously put it back up onto a group on ArcGIS.com.
09:00So similar to the way that I can share a geoprocessing package in that same dialog that we saw which is new in 10.1...
09:07...I can also share that same geoprocessing package, that same geoprocessing model, as a geoprocessing service.
09:14And I can do that really easily right from the Results window with a really easy dialog.
09:19And the reason that I would really want to do that is because I want to give...
09:24...I want to empower decision makers to use my professional knowledge, my professional GIS capabilities...
09:32...so that I don't have someone coming into my office every single day saying...
09:35...okay, I'm interested in the spring, well what about the nighttime, what about the morning, I just want April.
09:39I want to enable them to do that sort of analysis.
09:43So what I've done is by creating this geoprocessing service, I can enable them to do that on a simple web application.
09:48So here, I'm giving decision makers, not only the ability to look at the points on a map...
09:53...because sometimes points on a map are very interesting.
09:56They can query by the time of day.
09:58We can look at evening or nighttime, any sort of date extent we're interested in.
10:04But ultimately what I want to enable them to do is do that complex spatial analysis without having to understand it...
10:10...and I can feel confident that they're doing it right because I set it up.
10:13So they can learn a little bit more about it, or they can just go ahead and run the analysis.
10:18So behind the scenes, that geoprocessing service is doing all that complex spatial analysis and returning to them these hot spots.
10:25And because I've enabled a geoprocessing service, and this is now in this world of web services...
10:31...I also empowered them to take advantage of all these other services that are provided by Esri and other GIS professionals...
10:38...and dig in.
10:39So here, for instance, I wanted to give the decision makers the ability to dig a little bit deeper, and from each of those hot spots...
10:45...we're now using Business Analyst Online to get a better understanding of some of maybe the underlying related factors.
10:51In this case, we're looking at one of those high-violence hot spots...
10:55...and we see that the average household income is much lower there than the county and the state.
11:00We can see unemployment is actually higher, and we can see high school dropout rates higher.
11:05Similarly, we can go to one of these low-violence areas, and we can see that the average household income is much higher.
11:17We can see that unemployment is low, and we can see that the high school dropout rate is low.
11:22So a really simple web application that any decision maker could use...
11:25...but we're empowering them to do some really complex spatial analysis behind the scenes that we feel confident in...
11:30...because we've ultimately authored it the right way.
11:35Thank you, Lauren.
11:42Why I wanted you to see this is not because you're so interested in crime, or maybe some of you are...
11:54Maybe it would have been the data.
11:55Maybe it would have been the way that they represented the data as a map.
11:59In this case, it was a model.
12:01And I think as we progress on, not only will we invent and develop methods and tools and processes...
12:09...but also where we can really get the bang is to share those...upload them, other people discover them, download them...
12:16...a water resource model, a location-allocation model, whatever it is.
12:22As we invent both the suitability directed process models or the evaluation models...
12:29...what I wanted you to do is just get a quick sense of this is going be fun, isn't it?
12:34Leveraging each other.
12:35GIS has always been about sharing data.
12:40Share data, overlay data.
12:41But how about the data models, how about the analytic models, how about the cartography...
12:47...how about the methods, how about the workflows - all of that's going to come online.
12:51So, again, thank you, Lauren.
The Use of Shared Trade Craft to Perform Crime Analysis
Lauren Rosenshein from Esri demonstrates the use of shared trade craft to perform crime analysis at the 2011 GeoDesign Summit.
- Recorded: Jan 6th, 2011
- Runtime: 12:43
- Views: 25929
- Published: Feb 24th, 2011
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