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Welcome to the Kellylab blog

geospatial matters

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Wednesday
Dec172014

Wow! new D3 panel visualization

Mike Bostock's visualizations are glorious. This gives me lots of ideas for visualizing temporal variability across space. I can't embed this here, but I recommend you check it out.

http://bost.ocks.org/mike/drought/

They say: We published a more serious graphic today on drought’s effect on crops, but this was a fun animation we made to sanity-check parsing drought data. NOAA publishes monthly values for the Palmer Drought Severity Index going all the way back to 1895! Dark purple represents extreme drought, while dark green represents extreme moisture. In effect, this is a crazy electric version of Haeyoun Park and Kevin Quealy’s graphic, Drought’s Footprint.

Friday
Dec122014

Reservoir levels are still way below average

From our Faith Kearns at the UC Water Institute: https://twitter.com/ucanrwater/status/543501860527550464

As great as this bath has been, we still are way behind normal.

Major California reservoir levels (% avg) as of midnight yesterday compared to last week

Friday
Dec122014

Geo-tagged Tweets in Yosemite


Check out the Geo-tagged tweets in Yosemite Valley.  If you look closely you can see that people are tweeting from the top of Half-Dome, The Mist Trail, Glacier Point, and many parts of Yosemite Valley.  Harnessing this publicly available information may help in understanding what people are thinking and doing in our National Parks.  

All 6 Billion Geo-tagged Tweets are available to view at: https://api.tiles.mapbox.com/v4/enf.c3a2de35/page.html?access_token=pk.eyJ1IjoiZW5mIiwiYSI6IkNJek92bnMifQ.xn2_Uj9RkYTGRuCGg4DXZQ#14/37.7386/-119.5548

Monday
Dec082014

GIS related classes Spring 2015

Hello World!

There are several GIS classes to chose from in the spring. So far we have: 

Lower division:

  • Butsic, V  ESPM 72 Geographic Information Systems

Upper division:

  • Chambers, J    GEOG 185    Earth System Remote Sensing   

Graduate:

  • Biging, G & Radke, J   ESPM 210    Spatial Data Analysis for Natural Resources   
  • deValpine, P   ESPM 215    Hierarchical Statistical Modeling in Environmental Science (some spatial data analysis)
  • Radke, J    LDARC 221    Quantitative Methods in Environmental Planning
  • O'Sullivan   GEOG 228    Spatial Simulation Modeling 
  • Dronova, I    LDARC 254    Applied Remote Sensing
  • Wang, I   ESPM 290 Special Topics in Environmental Science: Spatial Ecology
  • Song, J     PH2728 GIS and Public Health

Email me with others.
Thanks!

Tuesday
Dec022014

NASA NEX wins the 2014 HPCwire Readers' and Editors' Choice Award

Congratulations to the NASA NEX Team! They have won the 2014 HPCwire Readers’ & Editors’ Choice Award for the Best Data-Intensive System (End User focused).  See the article here: NASA Earth Exchange (NEX) Platform supports dozens of data-intensive projects in Earth sciences.

The NASA Earth Exchange (NEX) platform supports dozens of data-intensive projects in Earth sciences, bringing together supercomputers and huge volumes of NASA data, and enabling scientists to test hypotheses and execute modeling/analysis projects at a scale previously out of their reach. NEX-supported applications range from modeling El Niño, creating neighborhood-scale climate projections, assisting in crop water management, and mapping changes in forest structure across North America, to mapping individual tree crowns at continental scale as a foundation for new global science at unprecedented spatial resolution. NEX’s OpenNEX challenge ties in to White House initiatives, including Open Data, Big Data and Climate Data, which advance national goals to address climate change impacts and include competitions and challenges to foster regional innovation.

The GIF has been partnering with NASA NEX, and developing a framework to bring NEX data and analytical capabilities into HOLOS.

Friday
Nov212014

Map of open source map resources (as of 2012)

From this great paper I just came across (already much has changed in 2 years, but still cool):

Stefan Steiniger and Andrew J.S. Hunter, 2013. The 2012 free and open source GIS software map – A guide to facilitate research, development, and adoption. Computers, Environment, and Urban Systems. Volume 39: 136–150.

From the paper: "Over the last decade an increasing number of free and open source software projects have been founded that concentrate on developing several types of software for geographic data collection, storage, analysis and visualization. We first identify the drivers of such software projects and identify different types of geographic information software, e.g. desktop GIS, remote sensing software, server GIS etc. We then list the major projects for each software category. Afterwards we discuss the points that should be considered if free and open source software is to be selected for use in business and research, such as software functionality, license types and their restrictions, developer and user community characteristics, etc. Finally possible future developments are addressed."

Tuesday
Nov182014

GIS Day 2014!

Discovering the World Through GIS

November 19, 2014, 5PM-8:30PM

UC Berkeley, Mulford Hall

GIS Day took place in Mulford Hall Wednesday Nov 19th from 5-8:30pm. We had about 200 attendees who participated in workshops, listened to talks, saw posters, and networked with other like-minded GIS-enthusiasts.

Some of the activity at 2014 GIS Day in Mulford Hall

See the agenda here: http://gif.berkeley.edu/gisday.html.

Tuesday
Nov182014

WorldView-3 launched August 13 2014

Worldview-2 has been a very useful sensor; we've used it for some of our wetlands work. On August 13th of this year DigitalGlobe launched WorldView-3 spacecraft. It will provide a 31 cm panchromatic resolution, 1.24 m multispectral resolution, with an average revisit time of <1 day.

From the Digital Globe website:

Introducing WorldView-3, the first multi-payload, super-spectral, high-resolution commercial satellite. Operating at an expected altitude of 617 km, WorldView-3 provides 31 cm panchromatic resolution, 1.24 m multispectral resolution, 3.7 m short-wave infrared resolution, and 30 m CAVIS resolution. WorldView-3 has an average revisit time of <1 day and is capable of collecting up to 680,000 km2 per day, further enhancing the DigitalGlobe collection capacity for more rapid and reliable collection. Launching in 2014, the WorldView-3 system will allow DigitalGlobe to further expand its imagery product offerings.

Here is their spec-sheet.

Friday
Nov142014

Sonoma County's historic aerial photographs

As part of the massive ongoing effort to map Sonoma County with high-res imagery and lidar, historic imagery of the county was collected and georeferenced. The Sonoma County Agricultural Preservation and Open Space District funded SFEI to mosaic 72 historic aerials taken over Sonoma County by the Department of Defense in 1942. Mark Tukman put together this web service with a image swiping tool showing the combination of the 2011 imagery service and the mosaiced historic imagery.
 
Sonomaopenspace.maps.arcgis.com

About the historic imagery: In 1942, the Department of War collected air photos in anticipation of a possible strike.  These photos are the earliest complete image set for Sonoma County and give us an unprecedented look at Sonoma County's agriculture and open space prior to the post World War II baby boom.

These images are snaps from the service, both from an area outside Rohnert Park in Sonoma County: on the left is the image from 1942, on the right is the area in 2011 showing considerable development.

2011 image

1942 aerial

Wednesday
Nov122014

Web mapping of high res imagery helps conservation

One of our collaborators on the Sonoma Vegetation Mapping Project has sent work on how web mapping and high resolution imagery has helped them do their job well. These are specific comments, but might be more generally applicable to other mapping and conservation arenas.

  1. Communicating with partnering agencies.
    • In the past year this included both large wetland restoration projects and the transfer of ownership of several thousands of acres to new stewards.
  2. Articulating to potential donors the context and resources of significant properties that became available for purchase.
    • There are properties that have been identified as high priority conservation areas for decades and require quick action or the opportunity to protect would pass.
  3. Internal communication to our own staff.
    • We have been involved in the protection of over 75 properties, over 47,000 acres. At this time we own 18 properties (~6500 acres) and 41 conservation easements (~7000  acres). At this scale high quality aerial imagery is essential to the size of land we steward and effective broad understanding. The way it is served as a seamless mosaic means it is available to extremely experienced and intelligent people who find the process of searching and joining orthorectified imagery by the flight path and row cumbersome or inefficient.
  4. Researching properties of interest.
    • Besides our own internal prioritization of parcels to protect, I understand that we receive a request a week for our organization’s attention towards some property in Sonoma. Orienting ourselves to the place always includes a map with the property boundary using the most recent and/or high quality imagery for the parcel of interest and its neighbors.  This is such a regular part of our process that we created a ArcGIS Server based toolset that streamlines this research task and cartography. The imagery service we consume as the basemap for all these maps is now the 2011 imagery service.  This imagery is of high enough resolution that we can count on it for both regional and parcel scale inspection to support our decisions to apply our resources.
  5. Orienting participants to site.
    • Our On the Land Program uses the imagery in their introduction maps to help visitors on guided hikes quickly orient to the place they are visiting and start folding their experience and sense of place into their visit.
  6. Complementing grant applications.
    • Grants are an important part of the funding for major projects we undertake. High quality imagery facilitates our ability to orient the grant reviewer and visually support the argument we are making which is that our efforts will be effective and worthy of funds that are in short supply.
  7. Knowing what the resources on a property are is an essential part of thoughtfully managing them.
    • In one example we used the aerial imagery (only a year old at the time) as a base map for botanists to classify the vegetation communities. These botanists are not experts in GIS, but by using paper maps with high resolution prints in the field they were easily able to delineate what they were observing on the ground on features interpreted in the photo.  We then scanned and confidently registered their hand annotations to the same imagery, allowing staff to digitized the polygons that represent the habitat observed. These vegetation observations are shared with Sonoma County and its efforts to map all the vegetation of Sonoma County.
  8. Conservation easement monitoring makes extensive use of aerial imagery.
    • In some cases we catch violations of our easements that are difficult to view on the ground, for example unpermitted buildings by neighbors on the lands we protect, illegal agriculture or other encroachment. It is often used to orient new and old staff to a large property before walking their and planning for work projects that might be part of prescribed management.
  9. The imagery helps reinforce our efforts to communicate the challenge to preserve essential connectivity in the developed and undeveloped areas of Sonoma County.
    • In the Sonoma Valley there is a wildlife corridor of great interest to us as conservation priority. Aerial imagery has been an important part of discussing large land holdings such as the Sonoma Developmental Center, existing conserved land by Sonoma Land Trust and others, and the uses of the valley for housing and agriculture.
  10. Celebration of the landscape cannot be forgotten.
    • We often pair this high quality aerial imagery with artful nature photography. The message of the parts and their relation to the whole are succinctly and poetically made. This is essential feedback to members and donors who need to see the numbers of acres protected with their support and have the heartfelt sense of success.

We look forward to the continued use of this data and the effective way it is shared.
 
We hope that future imagery and other raster or elevation data can be served as well as this, it would benefit many engaged in science and conservation.

Thanks to Joseph Kinyon, GIS Manager, Sonoma Land Trust