Folks:
The Global Shoreline Data that MDA Federal (formerly Earthsat) produced for NGA using global 2000 LANDSAT orthoimagery is now available for public download. This effort represents the most accurate global shoreline product (~1:100k). This new shoreline is an approximation of the High Water Line; it is NOT a Mean High Water Line since the source data have not been tide coordinated.
Why would you in education care about this data set? Read on. I have a lesson where I ask students to determine if the largest earthquake for a certain year is on or off shore. If one uses the generalized world continental outlines, the earthquake looks like about 2 km off the shore of Peru. However, if one uses a higher resolution shoreline, it could very well be ON the shore...big difference! It fits in well with what we are all striving for -- having students be critical of the data, and realizing that the scale in which the data was created matters! Also,
this data set would be useful for any type of regional study that you're doing where you want students to examine coastal processes.
The data are in a series of zipped shapefiles by region on the following site: http://www.nga.mil/portal/site/nga01/index.jsp?epi-content=GENERIC&itemID=9328fbd8dcc4a010VgnVCMServer
3c02010aRCRD&beanID=1629630080&viewID=Article
June 20
Folks:
The wonderful PRISM group at Oregon State University has released new 800 meter data sets on temperature and precipitation for 1971 through 2000 for the USA!
http://www.ocs.orst.edu/prism/products/matrix.phtml?vartype=tmax&view=maps
These are free data sets with no licensing restrictions. They are in Grid format that you can use in a GIS for further analysis, or just examine the web maps for a quick study.
June 14
Folks:
1) I found out from the fine folks at ESRI Canada that a recent article in Forbes highlights the increase in Internet-based map tools and also provides some great examples about how GIS is used: whether you're looking for dog-friendly hotels or tracking the avian flu virus, map software suddenly is hot tech.
http://www.forbes.com/global/2006/0605/062.html
2) The Census Bureau has released two special data products for the Gulf Coast area affected by Hurricanes Katrina and Rita. These socioeconomic and demographic products may be of interest if you teach there OR if you want to use the data inside a GIS to analyze population change. Why did some counties see an emigration and other an immigration? Really fascinating to look at the patterns.
First product are population estimates for the hurricane-affected areas along the Gulf Coast as of 1/1/06. These estimates provide population figures before and after Hurricanes Katrina and Rita hit the region last fall. Estimates cover the (117) counties designated by FEMA as eligible for public assistance.
http://www.census.gov/Press-Release/www/emergencies/impacted_gulf_estimates.html
Second product are demographic, socioeconomic, and housing characteristics for those 117 counties as collected by the Census Bureau's American Community Survey.
http://www.census.gov/acs/www/Products/Profiles/gulf_coast/index.htm
June 13
Folks:
1) Google upgrades mapping tools and satellite imagery: http://abcnews.go.com/Technology/wireStory?id=2068608&CMP=OTC-RSSFeeds0312
2) New sources for USGS topographic quadrangles (still useful for digital data such as DRGs, DOQs, DLGs, and DEMs and other layers still in 7.5-minute format) - below:
Geomart: http://www.geomart.com Map Express now has PDF versions of our indexes online (1:24K only). You can even download copies of the pdf's onto your computer. http://mapexp.com - Click on "Free State Indexes" on the left, then click the pdf link.
My favorite USGS indexes are still on
http://www.maplink.com
We also have our quad indexes on
http://store.usgs.gov
June 8, 2006
Folks:
It looks like TopoZone now incorporates clickable feature names (probably pulling from the Geographic Names Information System). So, if you are browsing through the topographic maps, you can click on schools, hospitals, mountain peaks, and other features, and the name will appear at the top. Perhaps they are still populating it, as the coverage doesn't seem to be complete (it was fine in Virginia where I looked, but was spotty in Colorado). Still, a very nice enhancement.
I'd like to alert the group that www.webgis.com is an excellent free source for USGS digital line graphs (vector rivers, transportation, boundaries, and other layers), land use, and DEM data. It is particularly valuable as a back-up data source when the web-based services such as the seamless.usgs.gov server is down. One particularly nice feature is that you have a choice on either latitude-longitude or UTM output for most layers.
Finally, I'd like to mention that we're almost at maximum capacity for the GeoTech Colorado 2006 event (http://www.gisetc.com/calwood.html) to be held in the beautiful Colorado Rocky Mountains at the end of July. If you were thinking about attending, you'll need to sign up as soon as possible or risk seeing "full" on the above web page. We are looking forward to working with many of you on this list.
Have an excellent day!







