Lecture 8. Online GIS

Transcription

1 Lecture 8 Online GIS

2 Lecture 8: Outline I. Online GIS 1. Google Earth 2. MSN Live Maps II. Open Source GIS III. ArcGIS Server and the ESRI suite of online software utility options IV. Advanced Data Mining

3 Online GIS Google Earth (v. 5) Information/Photo Uploads Terrain View/Tilt Street View Google Maps

4 KML/KMZ Files KML: Keyhole Markup Language Online GIS Google Earth A KMZ file is a compressed version of a KML file. Creation Process: 1. Create your data layer (i.e. shapefile, feature class) 2. Symbolize your data layer as you would like it to be displayed in Google Earth. 3. Convert to a Layer file. Right-click data layer in the table of contents and choose Save as Layer File 4. Run the Layer to KML tool. 5. Alternatively, you can run the Map to KML tool. Converts a map document.

5 Oblique Imagery from Pictometry Select Birds Eye Online GIS MSN Live (Bing) Maps

6 Open Source GIS Open Source GIS: Free software distributed with the source code. Desktop GIS: GRASS: Quantum GIS: Web-Based GIS: Open Layers: Google Maps:

7 Open Source GIS Google Maps Google App Engine Run your web apps on Google's infrastructure Pay for what you use - scalable framework Java and Python Runtime environments Replaces Google Mashups Google Maps API Embed Google Maps in your web page.

8 API Application Programming Interface A set of routines, protocols, and tools for building software applications. A good API makes it easier to develop a program by providing all the building blocks.

9 ESRI Online Software Tools ArcGIS Server ArcGIS Online ArcIMS Becoming obsolete

10 ESRI Online Software Tools ArcGIS Server ArcGIS Server: Distribute maps and GIS capabilities via Web mapping applications and services. Publish maps and store/manage data. Publish fast, intuitive Web maps tailored to your audience. Shrink data and application redundancy, optimize system configurations, and consolidating enterprise systems. Centrally manage your geodata. Simplify access to large volumes of imagery resources. Extend GIS to your mobile workforce. Online Demo:

11 ESRI Online Software Tools ArcGIS Online ArcGIS Online: Provides a common platform for ArcGIS users to discover, share, and build GIS applications, services, and content. Jump-start your GIS projects without additional investments in infrastructure or staffing. Services are hosted by ESRI. Save money because you don't have to worry about software and data acquisition, management, and updates. Save time because you have access to ready-to-use content to build your applications. Develop Web applications quickly by leveraging ArcGIS Online map and task services and ArcGIS Web Mapping APIs. Access prepublished maps and reference layers; browse templates, user guides, and tutorials. Easily organize, find, and share geographic information.

12 ESRI Online Software Tools Data Doors Data Doors: Enables GIS users to select, order, and acquire a variety of raster data that is currently accessible as ArcGIS Online content.

13 Data Mining Guidelines for Finding GIS Data Step 1: Explore the links at the following website for online GIS data sources. These include links to vector and raster data at local to international scales. Step 2: Crawl the Web with search engines like Google. Add "geographic information systems" or "GIS" to your keyword search. Syntax Examples: " GIS hydrology Mexico" "faults California.shp" " population India.e00 Step 3: Search several GIS support mailing list archives at the following web sites: Directions Magazine: A collection of all postings to the most popular GIS discussion lists. ESRI Support Center: Users often send requests for GIS data sources to these lists and then post summaries of their findings. Step 4: Post your own query to one of the above GIS lists. Be sure to have done the keyword search of the list archive first. Step 5: Get on the phone and call, or send an to the organization, agency or company that may have the data.

14 Data Mining GIS Data Considerations Always check for the following: Are the spatial data in a GIS software format: i.e. Shapefile (.shp), Geodatabase or Arc/Info (.e00)? Are the spatial files' map projection parameters defined? Does the projection match that of your other data? What is the scale of the spatial data? Does it match your other data? At what summary level are the tabular data (county, block group, state, etc)? How recent are the data? What were the sources for the data? What are the copyright requirements? Is there metadata associated with the data?