Monthly Archives: September 2009

New Datasets: Mumbai, India

We have recently acquired a variety of datasets for features in Mumbai, India.  Digitized from maps at a scale of 1:7500, a  total of 6 layers representing streets, water bodies, railroads, points of interest, boundaries and oparks are available.   Metadata records are now retrievable from the CU Spatial Data Catalog.  Remote access is available to these datasets for current CU affiliates via UNI.

New Datasets: Venice, Italy

We have recently aquired a variety of datasets for features in Venice, Italy derived from the NAVSTREETS database.  A total of 30 layers representing building footprints, streets, waterways, railroads, points of interest, facilities, boundaries and other features are available.   Metadata records are now retrievable from the CU Spatial Data Catalog.  Unfortunately we cannot deliver these datasets remotely, but you can visit the EDS lab for access.

New dataset: Electric Transmission Lines

We recently purchased a layer from Platts representing major electric transmission lines throughout North America.   Attribute information includes owner, voltage, company, category, length, circuit, transmission type and substation information.  This dataset meets or exceeds the National Map Accuracy Standards for geospatial data at a 1:250,000 map scale and is available for download from our spatial data catalog.

New datasets from ArcAtlas

This summer we acquired the 1996 ArcAtlas: Our Earth collection from ESRI.  The atlas features dozens of datasets representing a wide ranging array of features, including climatical, geological, biological and political characteristics as well as physical facilities.   We have merged most of the ArcAtlas layers to create world-wide coverages, and these new datasets are available for download from the CU Spatial Data Catalog.

ColorBrewer version 2

We have often recommended the ColorBrewer website – an online application which helps mapmakers choose appropriate coloring schemes in a GIS, particularly with choropleth maps.   There is now an updated version of the application, ColorBrewer 2.0.  There is a list of the differences over on the Free Geography Tools blog.

New datasets in CU Spatial Data Catalog

We’ve been working all summer to add records for our newer datasets in the CU spatial data catalog.  We will be detailing some of these new additions over the next few days.   Of notable interest is the addition of the vector layers for the 2008 ESRI Data & Maps Collection.  These layers include a variety of data types from throughout the world and are in ESRI’s compressed Smart Data Compression (SDC) format.   They can also be downloaded remotely for current Columbia affiliates.  Please note that most of the superseded data layers from previous years’ collections have been removed from the catalog in order to make finding the most recent data easier.  If you do require any of the older editions, please come see us in the EDS lab.

BIN numbers, park names, & building heights!

Finally! We have better answers to questions we get asked quite frequently, DOITT has added variables to their datasets.

I’m not sure when the layers were updated (6/09?) but this is something that will help a lot for students and researchers.

The Building footprints layer now has a field containing the BIN, and is offered as a file geodatabase for use in ESRI software, which should help with drawing speed and file size.

All other layers now have attributes attached, the spot elevation layer looks like it was also updated with building heights (heights are from MSL?), and the street centerline layer has street widths.

This is a huge improvement over what was offered previously and am very glad to see these layers publicly available!

Intro to GIS workshops

The September GIS workshop schedule is now listed on the DSSC calendar starting with three Intro to GIS workshops. Registration for the first workshop opens this Thursday.

All workshop are scheduled on Friday’s from 10:30 – 12:30 and are held in EDS, located in 215 Lehman Library.

We will give a basic overview of GIS, data models, spatial analysis, projections, finding data, and working with your own data.

There are two hands-on exercises, both using ESRI ArcGIS software so everyone who attends will get a chance to use the software and explore some of what we cover in the talk.

The Intro workshops are meant for anyone who either has had no previous experience with GIS or for anyone who needs a refresher.

Hope to see you there!