Web Services National Geospatial Management Center (NGMC) September 27, 2012 Webinar Presenter Jennifer Sweet If the name Jennifer Sweet doesnt ring any bells you may remember me as
Jennifer Brookover. Soil Scientist with SCS/ NRCS for 24 years. Nearly 5 years in WV before moving to NCGC/NGMC in Fort Worth. Questions? If you have questions during the webinar please submit them using the LiveMeeting
Q & A link. Send your questions in any time during the webinar and Ill try to leave some time at the end to answer. If you have questions after the webinar you can send me an e-mail at [email protected] or call 817-509-3421. What exactly is a Web Service?
According to Wikipedia, A Web service is a method of communication between two electronic devices over the World Wide Web. You can get data on your machine, in your office, from a computer located at NGMC (Fort Worth) over the Internet using a browser like IE (Internet Explorer). All you need is a URL (Uniform Resource Locator).
URL If I type the following URL in a browser, It leads me to this web service, NAIP CIR http://ncgcws.ftw.nrcs.usda.gov/ArcGIS/rest/services/ortho_imagery/NAIP_CIR/ MapServer?f=jsapi About the URL
Lets back up a bit on the URL, from To Hostname Instance Protoc ol
Service s Version of ArcGIS The services directory allows browsing of the contents of the server and to obtain information about the services.
A view of the geographic catalog that can be viewed in Google Earth. It is a downloadable kmz file. Folders on this server containing services. Expressed as themes. (Pretend F: Geodata)
Sitemap and Geo Sitemap are Google interfaces. REST and SOAP Interfaces These are both protocols for exchanging information through web services over a computer network. SOAP
Simple Object Access Protocol (SOAP) is a specification to exchange information using Extensible Markup Language (XML). Advantages: versatile, uses HTTP to tunnel through firewalls. Disadvantages: slower. REST REpresentational State Transfer (REST) is more an architectural style that consists of clients and
servers. The client initiates requests to the server and the servers process the requests and return the appropriate response. Advantages: lightweight, easy to build. Disadvantages: no common standard. Up for certification at Open Geospatial Consortium (OGC). Most common web service design is REST. Just for Fun
A quick Google search for ArcGIS/rest/services: http:// gis.srh.noaa.gov/ArcGIS/rest/services http:// 126.96.36.199/ArcGIS/rest/services/Map s/Weather/MapServer http://services.nationalmap.gov/ArcGIS/r est/services / http://www.geocommunicator.gov/ArcGI
Web Services A web service does not have to serve data that can be consumed by a GIS. Twitter, Yahoo, Flickr, eBAY and Amazon all have web services that do not contain geospatial data. This webinar will focus on the different types of Geospatial Web Services.
Geospatial Web Services A map is created in ArcMap (mxd) and is then published to the Web creating a web map service (WMS). The map, from the service, can be used in Web applications, ArcMap and other applications. Web Map Service The following
URL displays this page of Folders. Folders Each folder contains themes of web services. There can be
different types of services: Map Geoprocessing Image Folders Services in the government _units folder
Naming Convention Follow the USDA-SCA Geospatial Dataset File Naming Standard. The standard file names convey as much information as possible: dataset theme type of map features in the dataset Point (p), line (l), area (a) spatial location or extent of the dataset
file extension (as applicable) government_units/sca_a_us Folders _a means polygons, _l for lines. The _us denotes a
service for the US Folders Select the map service Government_units/sca_a_us
Applications to view the service in. The intended use for the service. Layers in this service. http://spatialrefere
nce.org/ref/epsg/4 269/html / GCS NAD83 Government_units/sca_a_us Units of the data The operations that can be performed with this
service. SCA Layer The label that displays. A vector polygon feature layer.
Select SCA SCA Layer All the fields contained in this feature layer along
with the data type and alias. Query can be supported on this layer. What We Know about the SCA Layer On host ncgcws in the government unit services folder.
Select sca_a_us layer: What applications to view the data in Description District Locations Projection - 4269 GCS NAD83 Supported Operations Export, Identify, Find Display Field - SITE_NM Geometry Type - Polygon All fields in the layer sca_a_us Layer
Adding the Service to ArcCatalog E 1- d an p x S
GI S ve er 2-Double click Add ArcGIS Server
rs 3-Default 4 Adding the Service to ArcCatalog 5-Type URL
Notice rest is not part of the URL. h is n Fi
6- Adding the Service to ArcCatalog Service added to Catalog Tree Content
s tab displays folders Comparison http:// ncgcws.ftw.nrcs.usda.gov/ ArcGIS/rest/services ArcCatalog
Adding the Data to ArcMap 1-Click the Add Data button 2-Select GIS Servers Adding the Data to ArcMap
3-Doubleclick the ncgcws service 4-Select the folder containin g the service to add to ArcMap
The red x means the service is not connected Adding the Data to ArcMap government_units was selected 5-Select sca_a_u
s 6-Click Add Adding the Data to ArcMap Supported Operations Identif y
Remember the operations supported by the service Identify being one of those. Identify Results Downloading Data If you need to do more with the data
than just Identify and Export, download from the Geospatial Data Gateway. The data can be downloaded from the service also. http://datagateway.nr cs.usda.gov /
Other Data in the Services You may run across data that have been built and altered for specific purposes. Many times data are generalized for display speed. This can help in locating a specific area in a US dataset quickly. Generalized Maps The layer
is described as Most Generalize d Notice the scale of 1:60 million
Generalized Maps States Generalize d Notice the scale of 1:4 million A generalized representatio
n of the coast. Geoprocessing Service Contains geoprocessing tasks accessible by Web-enabled clients. Tasks are created by publishing geoprocessing model and script tools. Each tool in the toolbox becomes a task in the service.
Geoprocessing Service http://ngmcgp.ftw.n rcs.usda.gov/ArcGI S/rest/services/ NGMC would like to do more with geoprocessing services. Something we will be investigating.
Geoprocessing Service One of the requirement s for a gp service is tasks. What the tool
is used for. Name of the task. Geoprocessing Task Choose a source layer. Add a
point on the chosen source layer. Geoprocessing Task Result Add the Geoprocessing
Service 2-Open ArcToolbox 1-Add the geoprocessing service Add the Geoprocessing Service
4-Select Elevatio n Tool 3-Double-click on ngmcgp 5-Click Open Add the Geoprocessing Service
Elevatio n Toolbox is added 6Expand the Toolbox Add the Geoprocessing
Service 8-Input parameters to run tool 7-Double-click Get MapService Features Geometry Service Helps applications
perform geometric calculations such as buffering or projecting. Other Web Services A Feature Service enables editing on a layer: NGMC has 1 WFS that is being tested A Geocode Service allows for finding
and displaying of addresses on a map. There are also geodata services, globe services, KML services, mobile services supported with ArcGIS Server. NGMC does not offer any of these services. Hosts The ncgcws host contains public web services. NGMC has other hosts that you may come across.
Other Hosts http://gdwweb1.ftw.nrcs.usda.gov/Arc GIS/rest/services http://imageserver1.ftw.nrcs.usda.go v/ArcGIS/rest/services http://imageserver2.ftw.nrcs.usda.go v/ArcGIS/rest/services Not an inclusive list. Services
There are approximately 200 web services at NGMC. Some of the 200 services are duplicates: Still supporting ArcGIS 9.2 Many of the ArcGIS 10 services are in the Web Mercator projection Web Mercator is not supported until ArcGIS 9.3.1 A Web Mercator service will crash ArcGIS 9.2 Other Hosts and Services
If the host name or service has test anywhere in the name then do not use in your map. Some of the 200 services are tests Testing various options of the data and services It can be confusing to have both test and production services on the same host NGMC is working on having enough room to do both production and testing on separate hosts We are having the same experiences you are,
Doing more with less. Image Services Provides access to raster (and image) data. Requires a raster or mosaic dataset. Can be used in ArcGIS Desktop. There are approximately 100 image services at NGMC. Map vs. Image Service
A map service requires an mxd. An image service does not. Serving image (raster) data through a map service requires an mxd This will slow the rendering of imagery data This will not slow the rendering of vector data Serving image data through a image service does not require an mxd, can consume directly This will speed the rendering of the data
Old (map service) vs. new (image service). Image Service In order to use the image service in ArcMap the Image Server Plugin must be installed in ArcGIS 9.2 and 9.3. Image Server Plugin The image server plugin is available for download and installation for
ArcGIS 9.2 and 9.3: It is CCE Certified There are separate plugins for 9.2 and 9.3 Contact your local ITS The plugin is provided in ArcGIS 9.3.1 and 10.0. Adding the Plugin to ArcMap 10 1-Select
Customize 3-Select Commands 2-Select Customize Mode 4-Select Image Server
5-Select Add Image Server Connectio n Adding the Plugin to ArcMap 10 7-Release left mouse
button 6-Left click and drag to ArcMap toolbar 8-Close Adding Image Service Data to
Get Services Services available on imageserver1 Adding Image Service Data to ArcMap 4Expand
5-Select 6-Add Can add more than one service at a time, just keep selecting and adding. 7-OK Adding Image Service Data to
ArcMap Map vs. Image Service A map service requires an mxd. An image service does not. Serving image (raster) data through a map service requires an mxd This will slow the rendering of imagery data This will not slow the rendering of vector data Serving image data through a image service
does not require an mxd, can consume directly This will speed the rendering of the data Old (map service) vs. new (image service). Image vs. Map Service Images served through a map service on ncgcws. A map service because it requires a mxd.
Renders more slowly for imagery data not vector data. The map services are used mainly to support those clients in ArcGIS 9.2. Image vs. Map Service Images served through an image
service on imageserver1. An image service because it does not require an mxd. Renders faster. Image vs. Map Service Map Service
Same data Image Service Whats Coming In ArcGIS 10.1 image server is being replaced by something called mosaic datasets: More testing services will appear when NGMC begins implementing
More duplicate services also to continue supporting ArcGIS 9.2, 9.3, and 10.0 Caching Service A map cache is the entire map at several different levels or scales. The cache also stores the copies of the map images. Map caching is a very effective way to make maps and applications run faster. It can take a while to create the cache
but the benefits are performance and quality. Caching Service A cache tiling scheme must be created. The cached images are no longer in a GIS format, instead they become a picture in either JPEG or PNG format. JPEG usually used for imagery. PNG format is used for any feature that requires transparency (opacity).
A service can have a mix of JPEG and PNG formats. Levels of Caching Most of the image services have approximately 14 to 18 levels. The levels can differ depending on the data and the intended use of the data. Cached Maps
Back to ncgcws.ftw.nrcs.usda.gov . Select easements. Selec t Cached Maps A good description of the service.
Imagery from 2007. Spatial Reference 4326=WGS84 Cached Maps 9 levels of detail.
Each level has a scale. Format = Mixed (Both JPEG and PNG). Cached Maps
The NAIP imagery collection: Entire US The year is not important as not every state is collected each year 4 band 1 meter resolution 35 terabytes (TB) of raw data 1 terabyte = 1024 gigabyte Cached Maps Each increase in levels or scale (ex:
24,000 to 12,000) increases the storage by a factor of 4. Also increases the time to produce by 4. It takes 4 times longer to produce caches at 12,000 than 24,000 and takes 4 times the storage space to store tiles at 12,000 than 24,000 scale. Another way to describe cost. Cached Maps Caching allows for the data to be
compressed 35 TB to 4 TB with caching 4 TB includes 17 levels with the final level at 1.2 meter resolution. However, 4 TB of NAIP + 4 TB of NAIP CIR. Still, 8 TB is less than 35 TB. How Do We Remember All These Hosts?
Instead of trying to remember all the different URLs NGMC has tried to collect all the services in one spot GeoPortal: http:// ncgcweb.ftw.nrcs.usda.gov/geoportal/cat alog/main/home.page Allows searching by theme GeoPortal is a work in progress Doing more with less
GeoPortal GeoPortal Select Data Themes Select State Boundaries Map Service
GeoPortal Select Open GeoPortal Select Preview GeoPortal Select
Details GeoPortal Select Metadat a Web API A web API (Application Programming Interface) is a set of HTTP requests along with responses usually
expressed in XML. The advantage of a web API allows for the combination of multiple services into a new application known as a mashup. Microsoft Silverlight is an example of an API. Web API Very quick to stand-up. NGMC uses Silverlight to supply
imagery for disaster areas. In 2011 Hurricane Irene, Mississippi and Missouri River Flooding. The services will be turned off eventually. Only available within the USDA network. Missouri River Disaster Service
Missouri River Disaster Service Check for Visible Transparen cy Slider Imagery on
differen t dates Missouri River Disaster Service A list of all the layers in the service
Whats Coming for Services Elevation (LiDAR) Services 6 TB of data and growing daily Do it yourself, publish your own web service We hope doing more with less Future Plans for the Services The services are currently hosted at NGMC.
All the services will move within the next year. Yes, the URLs will change and there isnt any way to prevent that. Why? Federal Data Center Consolidation Fort Worth data center is scheduled to close at the end of 2013 fiscal year: This is not the same as the National Geospatial Management Center
The Fort Worth office is not closing Only the data center (hardware, software, services) are closing For more information about the Federal Government Data Center Consolidation Initiative visit https://explore.data.gov/Federal-Government-Financesand-Employment/Federal-Data-Center-Consolidation-Ini tiative-FDCCI/d5wm-4c37 ?
Where are the Web Services Moving to? Most likely the National Information Technology Center (NITC) in Kansas City. http:// www.ocio.usda.gov/nitc/index.html Why here and not somewhere commercial? The answer to that is FISMA.
FISMA Federal Information Security Management Act of 2002 (FISMA). Recognizes the importance of information security. Requires each federal agency to develop, document, and implement an agency-wide program to provide information security for the information and information systems that support the operations as assets of the agency, including those provided or managed by
another agency, contractor, or other source. FISMA Defines 3 levels of potential impact on organizations or individuals should there be a breach of security. The impact levels are low, moderate and high. OCIO must make a determination of the impact level of your data. The storage solution provider must have matching certification
If the data have moderate potential impact the storage provider must be FISMA moderate certified FISMA OMB requires government data to be stored at a FISMA certified location Its called Authority to Operate (ATO) Currently only 3 FISMA certified locations: NITC in Kansas City
NFC in New Orleans NASA (Im not sure where) FISMA The law requires each federal agency to develop, document Yes, Amazon and Google cloud services may be FISMA certified, but for what Agency? Amazon had FISMA certification, but for only one Agency and only on one
application. The certification has since expired. FISMA Unfortunately, we cannot make commercial solutions become FISMA certified. It may not be in their business model to jump through all the government hoops.
FedRAMP Federal Risk and Authorization Management Program is a governmentwide program that provides a standardized approach to security assessment, authorization, and continuous monitoring for cloud products and services. Trying to get away from each Agency shall Making progress, but slowly. What is a Cloud?
The use of hardware and software resources that are delivered as a service over a network, usually the Internet. Clouds usually use REST-based APIs. Several types of cost models. Commercial vendors usually provide only racked storage and the customer provides much of the other services.
Cloud Services Cloud services require: Storage pricing Data transfer pricing: Adding NAIP 2013, new LiDAR data, etc. Data are not static Backing up the data Who patches for Security vulnerabilities? Not an inclusive list
An Exercise Amazon pricing First TB/month $0.125 per GB Next 49 TB/month $0.110 per GB NITC pricing $0.88/month per GB 1 TB = 1024 GB 4 TB of NAIP = 4096 GB 1024 * $0.125 + 3072 * $0.110 = $466/month * 12
This is only the storage cost and does not include other costs. Please note that these prices change regularly and were accurate as I knew them on 9/27/2012. Prices may be different tomorrow. Make a Map from Services Select Imagery Select
Add Basema p Click Add Make a Map from Services Make a Map from Services Turned on
Boundarie s and Places I zoomed in while you werent looking.
Make A Map from Services Searche d for soils Select Add Data from ArcGIS Online Click Add
Make A Map from Services The Fort Worth Federal Center Building 23 National Geospatial Managemen t Center. Can you see
me waving BYE?! Added a Soils service from ESRI that displays the Dominant Order
Zoomed in a little more Got Questions? Send them in via the LiveMeeting Q & A link. [email protected] 817-509-3421
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