new jersey geographer » Google

Release of “Changing Landscapes in the Garden State”

John Reiser — Thu, 29 Jul 2010 02:50:09 +0000

John Hasse and Richard Lathrop have been studying land use change in New Jersey since 2002. Their previous reports have been the impetus of many discussions on urban sprawl, environmental protection and resource planning in New Jersey. The reports themselves were released shortly after NJ DEP released their updates to the statewide land use/land cover data. This data set covers 1986, 1995, 2002 and released just one month ago, 2007. Over the past month, I’ve been working on the report’s website, hosted at Rowan on our GIS server. The last month has literally been a blur as we’ve worked to get the data for the report together and then into a series of interactive, animated web maps that show the progression of urban change over 21 years. Over the next few days, I’ll be posting a series on the project, from inception through implementation to release. I feel proud at my accomplishment – within one month I managed to prepare all the data, render and store it on Amazon Web Services, and develop a simple framework for animating a tile-based web map. I hope to be able to detail the process so that others may be able to do the same. If you have not done so already, please check out the report’s website and leave feedback and questions in the comments below. I’ll try to answer any questions about the projects in the subsequent posts.

© John Reiser for new jersey geographer, 2010. | Permalink | One comment | Add to del.icio.us
Post tags: Animation, Land Use, visualization

Feed enhanced by Better Feed from Ozh

Google Latitude now with badge, basic API

John Reiser — Wed, 06 May 2009 02:23:58 +0000

Google Latitude has been updated to incorporate new features that make it easier to share your location data. A website badge has been created that shows your most recent position on a web page. You can see an example of the badge showing my current location on this blog’s home page, as well as on the home page of NJ State Atlas. Google has also introduced a basic API allowing you to retrieve your location information as KML or GeoJSON.

Considering someone will likely (ab)use these new features soon, I’m starting a countdown. I’m guessing a week from now we’ll hear about how someone tracked someone unknowingly using a Latitude-enabled mobile device and the API. Personally, I’m hoping the API gets put to good use and is integrated into some groundbreaking projects.

© John Reiser for new jersey geographer, 2009. | Permalink | One comment | Add to del.icio.us
Post tags: Google, Google Latitude

Feed enhanced by Better Feed from Ozh

The Advent of All-knowing Point Maps

John Reiser — Tue, 21 Apr 2009 03:45:50 +0000

Over on MetaFilter today, there is a great post filled with links to interactive maps detailing various aspects of the recession and the eventual rebound in the economy. In looking through these maps, I’m irked by the cartographic conventions employed by some of them. Google Maps has started a dangerous trend: representing everything possible as a point on a map.

For example, take Richard Florida’s “The Shaping of America” interactive map in The Atlantic. The map relies on points of varying size to show the number of patents, the population and income levels for selected US cities. The size and color of the point is an indicator of the city’s performance relative to the surrounding “metro average.” There’s no definition of what these “metro areas” are. They are not delineated on the map. The boundaries of the city are also not reflected.

Why is this a problem? While not having the city outlined is concerning, the truly egregious flaw is that the theme of the map is dependent on a ratio without well-defined boundaries. Take, for instance, Trenton, New Jersey. Trenton is slightly north of the geographic center of New Jersey, however it is routinely grouped with “South Jersey” and is rarely grouped in “Central Jersey.” The parts of the State that identify themselves as “Trenton Metro” are limited to adjacent municipalities, if that. So what is the “metro area” of Trenton? Is Princeton included in Trenton? That would absolutely set Trenton above average for all three indicators mapped.

Map depicting just a few of the boundaries for Trenton, NJ

Now consider the New York Times Immigration Explorer. The Times has been cranking out some amazing maps lately and this one is no exception. This temporal, thematic map is rendered using Flash. It shows the 3,000 or so counties within the US with great detail and clarity. Ethic groups as a percentage of total population are reflected on a chloropleth map while the overall population is shown using dots of varying size. We’re back to the dot map, but it’s very different from the Google Dot Map above. The dots are sized in proportion to the total population, not an ill-defined sample. Also, the Flash interface allows the user to manipulate the base size of the dots, which allows the user to discern differences in population in the most sparsely inhabited regions.

Immigration Explorer would still convey its intended message if the cartographers behind it employed a dot map like the Shaping of America. Considering the data is explicitly by county, a point map could be used without introducing ambiguity. However, considering the geographies represented by the Shaping of America map are not well-defined, we are left guessing what we’re actually trying to represent with those dots.

Google Maps (and KML, the language for user-defined data in Google Earth) supports lines and polygons. Granted, there are more hoops to jump through to get vector data into Google Maps, but there are ways to do it. Maps that really require representation using polygons should not be constructed using points & Google Maps. Using Google Maps isn’t what’s important. Making sure your map delivers its intended message is essential.

© John Reiser for new jersey geographer, 2009. | Permalink | One comment | Add to del.icio.us
Post tags: Cartography, Google, Google Maps, New York Times, visualization, Web Mapping

Feed enhanced by Better Feed from Ozh

Google making Map Maker data available for download

John Reiser — Tue, 07 Apr 2009 03:58:31 +0000

Starting with Kenya, Google is allowing users to download the base data collected through the Map Maker service, as either KML or Shapefile format. Google’s licensing allows for only non-commercial use. Hopefully, this data will support some of the non-profit mapping efforts taking place on the continent. The license also restricts (or at least, severely limits) competition with services provided by Google. This puts OpenStreetMap in an odd position – OSM is restricted from incorporating the data into its own service. Considering OSM has been around since 2004 and Map Maker only 2008, and seeing how many people in over 100 countries have been offering Google data, OSM needs to better align (or contrast) itself with the work Google is doing. One of the reasons I believe Map Maker has gathered the amount of user-generated content in the past year is that Map Maker is incredibly easy to use and if you do run into issues, there is clear and concise help. This is compared to the OSM Beginner’s Guide. Now, I understand that OSM is geared towards a more technical audience than the Map Maker service, but OSM needs to spend more time fostering a community outside of the devoted submitters. What is going to prevent Google from offering up a GIS service akin to the Virtual Earth on ArcGIS platform currently being offered by ESRI and Microsoft? A service built on TA/Navteq data, enhanced with local knowledge? A service that is available now from OSM, but much easier to use? Providing base data for Kenya is just the beginning.

Mikel Maron has some more thoughts about OSM and Map Maker, as well as some comparison screenshots. (Via Mapperz)

© John Reiser for new jersey geographer, 2009. | Permalink | One comment | Add to del.icio.us
Post tags: ArcGIS, Google Map Maker, Google Maps, OpenStreetMap, Virtual Earth, Volunteered Information

Feed enhanced by Better Feed from Ozh

Using Sketchup to visualize $1 trillion

John Reiser — Wed, 11 Mar 2009 22:35:57 +0000

This page has a visualization of the sheer size $1 trillion dollars would occupy using $100 bills. The images are rendered using SketchUp, one of my favorite applications.

I came across this link while browsing BoingBoing, and one of their comments I feel sums up much of what I feel nicely:

I love how the cost of making and sharing this diagram is still $0.00 no matter how big the problem.

© John Reiser for new jersey geographer, 2009. | Permalink | One comment | Add to del.icio.us
Post tags: SketchUp, visualization

Feed enhanced by Better Feed from Ozh

Fun with Google Latitude

John Reiser — Sat, 07 Mar 2009 01:04:42 +0000

Kate was tracking my progress home tonight, as I was going to pick up Thai food along the way. I manually set my location to “Thailand” and found when I got home, Kate was very confused as to where I was. Setting my location to “Thailand” actually set me as being in “Nong Chaeng,” which I assume is the closest place name to Google’s center point for Thailand.

When will Google release an API for Latitude? It should also tie into OpenSocial, like how iGoogle and Orkut do now. Google has been really great in releasing new and innovative social networking components and applications, but they need to really follow through and support their creations. Offer up an API and the community will do the rest.

© John Reiser for new jersey geographer, 2009. | Permalink | One comment | Add to del.icio.us
Post tags: Google Latitude, Location-based Services, social networking

Feed enhanced by Better Feed from Ozh

Ogle Earth on redaction of images from Google

John Reiser — Mon, 23 Feb 2009 19:07:44 +0000

Today, Ogle Earth has posted an excellent article on images from Google Earth that have gone missing. The imagery is of an area in Pakistan. Apparently Dianne Feinstein commented that the US military has been using a base in Pakistan for the staging and deployment of unmanned drones. This comment precipitated a chain reaction of reissued statements and denials. The images in question showed aircraft similar to those of the Predator drones. This image has since been removed from Google Earth and DigitalGlobe.

Ogle Earth sums up the issue quite well:

Did both Google and DigitalGlobe separately receive a request from a government (presumably the US, but possibly Pakistan) to remove this imagery from public scrutiny, and comply, or is there a contractual obligation/legal obligation on the part of Google to remove imagery from Google Earth if DigitalGlobe removes it from its product list? Did DigitalGlobe make a mistake in publishing the 2006 imagery available in the first place, considering that the US military has “shutter control” of the satellite’s cameras? Or perhaps (and I’m merely speculating), since the Predator drone operations are run by the CIA and not the US military, were shutter control orders somehow not properly relayed via the usual channels?

I’d love to find out exactly why the images were pulled. Once they’ve made the rounds, it’s almost pointless to remove them. Haven’t we learned from the Streisand Effect?

© John Reiser for new jersey geographer, 2009. | Permalink | No comment | Add to del.icio.us
Post tags: Data, DigitalGlobe, Google Earth, Government, redaction, satellite

Feed enhanced by Better Feed from Ozh

Southwest Florida

John Reiser — Mon, 09 Feb 2009 14:25:01 +0000

Kate and I are down in Southwest Florida visiting her family. We drove down from New Jersey and used Google Latitude to share our location with her family and my parents. Kate and I also are taking some pictures using my GPS-enabled BlackBerry and are posting them on Flickr.

There probably won’t be many updates to NJ Geo and NJ State Atlas until I come back up next week.

© John Reiser for new jersey geographer, 2009. | Permalink | No comment | Add to del.icio.us
Post tags: Flickr, Florida, geotagging, Google Latitude, Southwest Florida, Travel

Feed enhanced by Better Feed from Ozh

Google’s historic aerials have shuffled dates.

John Reiser — Wed, 04 Feb 2009 00:36:40 +0000

Before Google Earth 5 had come out, I had commented to a few people that the dates for the aerial photos (which used to be displayed in the bottom center of the screen) were way off for New Jersey. The date was reported as 2004, but it was clearly 2007 imagery.

Well, this little problem is now a bigger issue. In browsing the area around Rowan University (where considerable development has occurred in stages between 2002 and 2008), I noticed several places where the “2004″ imagery shows a further progression of development than the (actual) 2006 photography. I’ve prepared a KMZ file with annotated points, highlighting places where the development that is visible in the “2004″ aerials had not yet occurred in 2004.

Considering I had noticed this discrepancy throughtout the State before Google allowed you to transition through the older imagery, I took a look at another location in the State where development is occuring, Newark. Google Earth has 11 different sets of photography available for Newark. The very big problem is that the default imagery is pre-Prudential Center. This is even reflected in Google Maps. The default images in both Maps and Earth is now the “December 30, 2002″ images. Many of the buildings that are in Street View for Newark are not to be found on the aerial photography. The 2002 data is the second-oldest data available, but it’s now the default.

This seems like a pretty big mixup for Google to make. We’ve gone from posting imagery within the same day to reverting back to a 4 to 6 year lag.

Find another place in the State (or elsewhere) where the dates are obviously wrong? Let me know in the comments.

© John Reiser for new jersey geographer, 2009. | Permalink | No comment | Add to del.icio.us
Post tags: Aerial Photography, Google Earth, Google Maps, new jersey, Oops, Technology

Feed enhanced by Better Feed from Ozh

Latest Google Earth has historic aerial photography

John Reiser — Tue, 03 Feb 2009 11:50:14 +0000

Digital Urban has a writeup of one of the newest, perhaps most exciting feature to be added to Google Earth. Historic aerial photography! For many places around the globe, you now have access to previous aerial photography, as far back as 1950 in some places. I’ll have to take a look into what Google has for New Jersey; are the 1930s aerial photographs available in Google Earth?

Feed enhanced by Better Feed from Ozh