Category Archives: technology

Live ocean mapping in the South Pacific

Just today I learned about NOAA’s Okeanos Explorer current trip in the Pacific. Apart from the live (and previously recorded) narration that I’m finding mesmerizing, I can’t stop watching the “live” mapping taking place on one of the media feeds.  For someone who has spent her entire professional career accessing geospatial data to use in mapping projects, that fact that I’m watching new digital data being produced – LIVE – where there was no data before – is blowing my mind.  About 8 or 9 yrs ago, I actually watched people buy shoes from Zappos in real-time. We’ve come a long way, baby.

It Takes a Village: Intersections between Geospatial Professionals, Governments and Educators

Significant and widespread accomplishments involving digital technologies at a national level, whether in schools or homes or businesses, are possible through cooperative planning and creative partnerships. The larger, more ambitious the project, the more coordination – and long-term commitments – will be required to increase the likelihood of measurable success. Given the ways in which geospatial technologies cross the sectors of government, infrastructure, and education, it is no surprise that examples from the world of geospatial technologies are emerging.

In 2007 the Uruguayan government launched Plan Ceibal, a plan to provide a laptop computer for each child enrolled in a public school, and made a parallel commitment to expand and provide high-speed Internet access across the country. Since then, reliable Internet access has enabled notable national programs in health care, agriculture, and social services, as referenced in this video, Uruguay Digital 2015. The Internet has also allowed Plan Ceibal to pursue and expect increasingly innovative usage of those laptops, such as providing online instruction for learning English and accessing open educational resources that are aligned with school subjects.

Of course, there’s a place for GIS in this mix too. The Ministry of Transportation and Public Works’ National Bureau of Surveying has partnered with gvSIG, a Spanish association of developers of an open source GIS software, on gvSIG Batoví (Spanish) which aims to be “GIS applied to educational environments intended for Plan Ceibal and based on gvSIG.”

However, the initial instance of gvSIG Batoví was designed only for use with the limited operating system of the Ceibal laptops, which is ultimately limiting for an initiative with broader potential and ambitions. Thus the partnership has led gvSIG to develop gvSIG Educa, a prototype for what a country-specific, educational GIS might look like. The idea is that both students and teachers would have access to a GIS that comes complete with numerous layers of data at many relevant geographic scales, and the users can combine these to produce their own maps that help them reach their educational goals. On-going efforts to develop and enhance the platform have been aided by contributions from the global OSGeo community, such as a recent contribution via Google’s Summer of Code.

Meanwhile in Uruguay, activities continue that are mutually beneficial to all sectors involved. Workshops and classes have been offered to both teachers and students, and the platform is being shared with future geography teachers in their teachers’ college. Prepared materials (in Spanish) for those events, such as this manual for a workshop for secondary students and this one for geography teachers can be downloaded from the OSGeo website. Through their involvement with these programs, the National Bureau of Surveying has opportunities to share its activities with potential future employees, and the data being produced as part of the spatial data infrastructure of Uruguay is reaching new national audiences. The Geospatial Information Technologies Working Group of the University of Uruguay’s College of Engineering, another contributing partner in the project, can connect too with both prospective students and relevant government departments.

In other countries, some partnerships are less formal or official but the activities are equally valuable. For example, in Belize the Esri distributor, Total Business Systems, Limited, is generous in the ways in which it provides GIS-based visualizations of data of national interest. During the national presidential and congressional elections in 2015, they produced live maps to be shared online and over TV as results were being returned. To help put the results into a historical context, they produced an Esri Story Map that highlights changing electoral patterns and enables simple comparisons of the general election results over the last 30 years. This is but one of the map series available in the Belize GIS Education Portal that TBSL has built and maintains.

Companies such as TBSL donate time and effort to educational activities and resources because they are committed to long-term outcomes and the value of geographical thinking for an educated citizenry. Issues that have a specific geographic context are on the minds of many Belizeans, such as the disputed border with Guatemala and the risks associated with seasonal hurricanes and flooding. Using geospatial technologies like GIS to understand these topics is a no-brainer, and it isn’t difficult to get students excited about the technologies. TBSL just hosted its 5th annual World GIS Day Expo in November and over 900 students attended. Among the exhibitors were the Statistical Institute of Belize, the Belize Police Department, the Belize telephone company, and the Coastal Zone Management Authority. Creating opportunities for students to see diverse applications of the technologies in both the government and private sectors is an obvious but fundamental step towards future workforce awareness.

As in Uruguay, educators in Belize are also learning about the possible roles for geospatial technologies in teaching and learning. The same week of their Expo, TBSL organized and hosted two workshops for primary, secondary, and tertiary school educators that focused on the potential for use of GIS to support learning across the curricula. (Full disclosure: one of this article’s authors, Diana Sinton, was an instructor in those workshops.) These may even have been the very first GIS educational workshops in Belize, and the country has no particular “champion” within its government that is currently promoting and encouraging the use of educational GIS, but even baby-steps eventually lead somewhere.

   

GIS Day 2016 in Belize

There is no single one-size-fits-all model or type of partnerships among commercial, governmental, public and private entities when it comes to GIS and education. Instead it’s a series of evolving dances and multiple partners will alternate taking the lead. Both top-down and bottom-up approaches have their time and place, as well as the use of proprietary and open source software solutions, and all of this will be taking place concurrently anyway. When a government opens educational doors with programs like Plan Ceibal in Uruguay or ConnectEd in the United States, companies like gvSIG or Esri might be well-positioned to get their respective GIS feet in those respective doors. Or, sometimes a local voice for a larger company plays that role, like when Spatial Innovision Limited signed on to manage the GIS licenses for dozens of Jamaican schools on behalf of the government.   

Ultimately, success is still dependent on the community to sustain and nurture the programs beyond their initial marketing and document-signing phases. It’s the boots on the ground that count in the end, so whether it’s GeoMentors or Geo For All, make sure you build the human connections into the plan. 

Uncommon situations that warrant spontaneous purchases

I’m finding the development of location-based services to be both intellectually intriguing and amusing.  The ThinkNear mobile advertising business endeavor of Telenav intrigues me because I like the ways they’ve grappled with explaining the complexities of geospatial location to business-minded novices. Seeing their current home page ad has been an amusing highlight of my day. Definitely an advertising location_based_services_ad (800x385)idea thought of by a man, but I admit it’s clever. Makes me want to send it to my friends and see whether they get it.

Elevation data: Where to go and what to know

Digital representations of the surface of the earth are a key data set for many GIS projects, but locating, identifying, downloading and manipulating digital elevation data is not for the faint of heart. There are many different skills required and hundreds of tools, systems and instruments from which to choose. In this article, author Diana Sinton highlights available resources and need-to-know information.

Introduction to the digital elevation model

The most common form of digital representation of the surface of the earth is presented as values of elevation above sea level, often derived from sampled point measurements and represented in raster formats as a digital terrain model or digital elevation model (DEM), or as a vector triangulated irregular network (TIN). Apart from generating a topographical surface itself, these data are also the basis for deriving slope gradient, slope aspect and hillshade relief.  Digital elevation data are central to transportation planning, land use planning, and geological and hydrological analyses, among countless others.  For this article, we’ll focus on DEMs as a generic format of elevation data in digital form.

For many years, the most common source and scale for a DEM were the 10-meter and 30-meter resolution data organized and distributed by the US Geological Survey to align with their 7 ½ minute topographic quad sheets. These original DEMs were derived from traditional photogrammetric methods or reverse-engineered from contour lines. Errors and inaccuracies abound. Nine times out of ten, one’s area of interest was situated at the intersection of four quad sheets, so there was great rejoicing when it became possible to download “seamless” elevation data, foregoing the need to edge-match or mosaic multiple data sets together. 

Measuring the horizontal resolution of elevation data often refers to spherical units of arc seconds, or 1/3600 of a degree. One arc second represents approximately a 30-meter grid cell.  Accordingly, a one-third arc second of measurement is approximately ten meters in distance, and a one-ninth arc second is three meters. However, these measurements hold true at the equator, when both latitudes and longitudes are evenly spaced.  Once distances are measured towards the poles, longitude measurements begin to converge and regular grid spacing becomes distorted.  By the time one is measuring in arc seconds at 49 degrees latitude, an arc second of longitude has shrunk to 20.25 meters and grid cells have become elongated in shape. 

Becoming familiar with the arc second system of horizontal measurements is a worthwhile investment of time when navigating elevation data sites, but it may be even more important to understand the absolute and relative vertical errors within DEM data. The original production goal of the 7 ½ minute USGS quads included a vertical accuracy standard of 7 meters, and up to 15 m variability was permitted (USGS Data Users Guide, pdf).

DEM meets Big Data in the US

Fast forward to 2015 and digital elevation information has intersected with the Big Data movement. In the United States, the National Elevation Dataset (NED) has replaced the former system of quad-based DEMs.  Significant efforts have been made to ensure that the horizontal and vertical datums, elevation units and projections or coordinate systems have been made consistent or, where needed, optimized for that locale. Root mean square errors for vertical accuracy have fallen to less than 2 meters within much of the NED collection.  Light Detecting and Ranging, aka LIDAR, data, and interferometric synthetic aperture radar, aka IfSAR, have become the standard approaches for high resolution data collection, and this has allowed for improvements and upgrades throughout the United States. Unlike the bare-earth presumption of DEM data, these new sources also provide detailed data for what is on the surface of the earth, for example the heights of vegetation and structures. The use of new technologies has been particularly important in states such as Alaska, where conditions had never previously permitted consistent and high quality data to be collected.

Of course there are times when it is both desirable and necessary to access older data, particularly when needing to make comparisons between before-and-after geomorphic changes following earthquakes and volcanic eruptions. For such purposes, the USGS also maintains a collection of historic DEMs.

Global data resources

When elevation data outside of the U.S. is needed, two important sources include data derived originally from NASA’s Shuttle Radar Topography Mission, as well as the more Advanced Spaceborne Thermal Emission and Reflection Radiometer global digital elevation model, now at Version 2.  Since its original collection in the year 2000, the SRTM data has been corrected and revised, and its 90-meter resolution coverage is some of the most comprehensive world-wide.  ASTER's Global DEM data has also undergone revisions and corrections, and its one arc second, 30-meter, resolution extends to even broader global coverage. 

New satellite technologies and demand for higher resolution and more consistent data are driving the growth in digital elevation data advancement today.  In 2010, DLR, Germany’s national aeronautics and space research center, launched the TanDEM-x satellite to partner with the already-orbiting European TerraSAR-X and is now producing data designed to be high resolution, with great vertical accuracy, and as consistent and reliable as possible in their coverage.

In the U.S., the current 3D Elevation Program has brought together multiple funding entities to produce and distribute nation-wide LIDAR data coverage, with IfSAR-based data in Alaska. Acquiring and processing these data will take years, but there is wide agreement that it is a wise investment with extensive benefits for the public and private sectors alike. The specter of sea level change has also compelled NOAA to prioritize LIDAR-based topographic data for coastal regions

Locating, identifying, downloading and manipulating digital elevation data is not for the faint of heart.  New interfaces for data discovery such as Reverb|ECHO come complete with 317 platforms, 658 instruments and 717 sensors from which to choose. Even the simpler National Map and Earth Explorer assume that users are familiar with the optimal spacing of LIDAR point clouds, arc second measurements, and the deciphering of acronyms.  OpenTopography is specifically designed to lower the access barriers to high resolution data, but to date the availability is limited. 

My advice? Give yourself plenty of time to sort out what’s available for your area of interest and what you really need for your project or application. Being able to find exactly the data you seek, download it, figure out and manipulate its compression format, modify its projection or coordinate system and successfully add it to your project is likely to require persistence, patience and the knowledge of a rocket scientist.  Or two. 

Future of R with GIS

I was a total newbie to R before spring 2014. Then it was a little trial by fire, trying to learn just enough to keep up with grad students in a class I was co-teaching. Thank goodness for the “co-” part, as my partner was an expert in the topic, and I could contribute in my own areas of expertise, which were/are not R!  But I finished the semester with a new-found respect and, frankly, awe for what is possible with R. I have much to learn, and maybe, someday, the time.

Fast forward a few months and the topic keeps cropping up.  I shared a beer in Salzburg with Lex Comber and learned about one of his forthcoming publications, an Intro to R for Spatial Analysis and Mapping. Haven’t got my own copy yet, but if it’s what it seems to be, it’ll be one of my assigned texts in the future. In one of our webinars, Trisalyn Nelson spoke about her use of R with her graduate students. And today, I silently scanned through Alex Singleton‘s recent presentation on the Changed Face of GIS, in which R figures prominently for him.  There’s something going on here that some smart people have figured out.

Sharing Ideas at EdUC

It’s that time of year again, July in San Diego with a whole lot of other people, all talking about GIS.  Plus ça change, plus c’est la même chose.  This year I’ll be in two sessions, the first on our ROGTAL project, Research on Geospatial Technologies and Learning, a group effort in which I’m honored to be a member.  You’ll hear about our proposed research agenda and recommendations for this field.  Saturday afternoon, in the 3:15-4:30pm session titled Meeting Education Mandates, La Costa Room.

Then on Sunday morning (early!, before the Plenary!  Set your alarms and bring your coffee!) I’ll be leading a session on Cultivating Spatial Thinking & Problem Solving with SpatiaLABS.  8:30am, Leucadia Room.  Don’t know about Esri’s SpatiaLABS yet?   This is your chance to get all the insider information on this FREE resource, get a sneak preview at a new search-and-sort website, get your questions answered by the series editor, and find out how you too could become a (paid) contributor!  Don’t snooze, come schmooze instead.

 

On using ArcMap Collector as a mobile app for SSV

Experimenting with reblogging some worthwhile posts.

Moravian Studies and Digital Thinking and Praxis

Since its inception, Stories of the Susquehanna has been a collaborative, interdisciplinary Screenshot 2014-05-08 21.41.18digital project that has at its core a geospatial interface. What started out as historical/cultural mapping of the Native American landscapes of the Susquehanna in ArcMap Desktop with maps published in static image format (as discussed in the interviews of me and Emily Bitely) has evolved through the iterations of ESRI’s software development.

About a week ago, one of our Digital Scholarship Coordinators and SSV  project manager, Diane Jakacki pointed to to the fact that ESRI was now publishing apps. photoAt first skeptical, I proceeded to delve further into the Collector app and battled my way through tutorials designed for insurance adjusters gathering data in the field (no, I don’t need fields labeled “Habitable” or “Partially Destroyed”) to create a feature layer that could be added to any map in ArcMap online. This feature layer was supposed to be…

View original post 323 more words

UCGIS Tackles Geographic Information Science in the 21st Century

The University Consortium for Geographic Information Science (UCGIS) was established in 1995 to advance research in the field of Geographic Information Science and to strengthen its use in education and advocate for its ethical use by growing scholarly communities and networks. In July of this year Diana Sinton became its latest executive director. Directions Magazine asked her about the organization and its latest challenge, the GIS&T Body of Knowledge, version two.
 
Directions Magazine (DM): The University Consortium for Geographic Information Science promotes and advocates for research and education in the field. What exactly is geographic information science? Is that an academic/research term or should geographic information systems practitioners be using it too?
Diana Sinton (DS): Geographic information science refers to the knowledge of how geographic information can be represented, modeled, analyzed, understood and reasoned with, etc. No geographic information system could exist without someone having applied that type of knowledge to the design and building of the GIS, and there is also a science behind how GIS is used to support spatially-based decisions. The term “science” shouldn’t be off-putting to practitioners, and it’s the best word for this collection of information. It simply references information that can be systematically explained and applied. Geographic information science contributes to all of the functions behind our geographic information systems. 
DM: UCGIS grew out of the U.S. National Science Foundation’s establishment of the National Center for Geographic Information and Analysis (NCGIA) back in 1988. How do the challenges UCGIS faced back then compare to those on the docket today?
DS: When UCGIS became incorporated as a non-profit organization in 1995, far fewer people appreciated the important role that geospatial data and technologies could play in the world. In the intervening two decades, both knowledge and applications have spread and there is less need to convince anyone in industry, science and government, for example, about the importance of these important areas. Geospatial data are firmly part of the Big Data movement today. 
 
However, UCGIS works directly with and on behalf of institutions of higher education, and the messages about GIScience are not as widely recognized and appreciated with that audience. Understanding the value and opportunities around geographical thinking and perspectives can be a hard sell in academia. Moreover, the economic crisis of the last few years has eliminated much of the discretionary funding that institutions and government agencies used for organizational memberships in the past. Our operating budget comes almost entirely from dues payments, providing relatively little long-term security at this point. Thus, aiming to diversify our sources of income is now an element of our long-term planning. 
 
Twenty years ago, GIS and GIScience were tiny players on a university campus. UCGIS was founded primarily by the most active and heavy hitters at large, public universities, faculty with steady and ambitious research agendas. They most often represented a single department on their campus, probably the geography department. Fast forward 20 years, and the GIS presence on campuses is wholly different. At large institutions, scholars involved in GIScience-informed research are likely to be active and present in multiple departments, branching way out from geography alone. Because of the growing interest in GIS as an entry-way to learning in many disciplines, institution-wide GIS centers are even common among UCGIS member schools. This abundance itself can even be a challenge to manage, and to leverage. As spatial analysis and geographic data visualization become more common-place, how does the role of GIScience evolve and continue to be relevant? This is both a challenge and opportunity for our member institutions, and therefore for UCGIS too. We discussed some of the specifics in this overview article on GIS use and adoption published last year in Directions Magazine.
DM: The vast majority of UCGIS members are U.S. colleges and universities. Should other organizations consider joining? Why?
DS: Colleges and universities will continue to comprise our core set of members, but our affiliate membership plan is designed with other organizations in mind. UCGIS holds an important spot at the nexus of where GIScience and GIS&T meet up within higher education venues. It’s our mission to stay current on the issues that affect GIScience research and education: policies and legislation, trends and practices, curriculum and workforce demands. Being part of UCGIS means having a seat at the table, becoming part of the community of practice that not only values these issues, but is well-informed about them. Our relatively small size allows us to be nimble and reactive, as well as strategic and proactive. We facilitate networking and outreach, and seek opportunities for creative and effective partnerships with industry, government and the private sector, when the projects are aligned with our mission and in the best interest of our members. 
 
If it’s important to a group or organization or institution to know they can reach and engage with this audience, those at the intersection of GIS&T and higher education, then involving themselves with UCGIS is an obvious choice. We welcome inquiries about new memberships.
DM: One key initiative of UCGIS is a revision of the Geographic Information Science & Technology (GIS&T) Body of Knowledge from 2006. It’s available as a free PDF, with support from Esri and AAG. The new version, to be known as BoK2, is expected in 2015. Why do we need an update? 
DS: The only thing constant is change, and that’s certainly true within a discipline that focuses on geospatial technologies. Curricula and the knowledge on which it’s built have to accommodate the changes within our discipline: new ways of creating and contributing data (VGI, crowdsourcing, new sensors, etc.) and news ways of engaging with technologies (mobile mapping, location-based services, etc.). No one ever intended the first version of the BoK to be the forever-version. It was a necessary first step, and its authors and UCGIS have known from the beginning that it would be revised at some point. Every effort is being made to have these processes be both transparent and participatory. 
 
The BoK2 project will let us graduate from a paper-based, book format to an online platform that better facilitates interaction with the content, to explore and discover connections and learning pathways that are not now readily possible. This is also an opportunity to bring other voices into the creative authorship mix, and make strategic design decisions. We expect the new platform to include a sustainable information architecture and an infrastructure to allow for new content curation strategies. We want to improve the ways in which people can extract the particular knowledge that is most meaningful to them, such as natural learning communities, subject matter experts, and diverse groups of educators. More attention will be paid to alignment with the Department of Labor’s Geospatial Technology Competency Model, not because these two collections serve competing purposes, but because both represent efforts to benefit the GIS educational community and the workforce that relies on GIS&T. 
DM: What is UCGIS’ role in developing the new document? What is the process to create the new version and how can practitioners and other interested parties participate?
DS: As the copyright holder of the original and future versions, UCGIS has taken the lead role in guiding this revision process. In late 2012, we asked John Wilson, of the University of Southern California’s Spatial Science Institute, to direct the multi-year project for us. Since that time, several workshops and information gathering sessions have been held with different groups of stakeholders, and John has now organized a 25-member Steering Committee that is to begin an 18-month-long process of discussions, contributions and development. There will be several meetings held at which interested parties will be able to share their ideas and have their voices heard, including at the 2014 AAG conference in Tampa and the 2014 UCGIS Symposium in Pasadena.  On the UCGIS website, we will be building a page dedicated to the BoK2 project where we will share status updates and provide a chance for the curious to post questions and comments.

shadows and mirrors in Norwegian town

One small Norwegian town is geographically plagued by its position in a valley, leading to topographically-induced shading during its otherwise already dim winter days.  An attempt at a targeted solution?  Mirrors strategically placed.

Good luck to them!  I love that it combines the best of geographical AND spatial thinking, or spatial thinking in situ. That’s also called geodesign.

 

a new lit and map app from Iowa

In the inaugural issue of the Journal of Interactive Technology & Pedagogy, a group of authors shared their work on the “City of Lit”: Collaborative Research in Literature and New Media.  There’s nothing that singly knocks my socks off about the project, but I do like the combination of an undergrad literature classroom + primary research in archived library collections + user-generated-content additions to the database + geotagged stories on a mobile device.  And they managed to scale it up to a good sized classroom too.  Nice.