|By Troy Pullis||
|December 12, 2005 05:15 PM EST||
Recently I was tasked with improving our Web site's Reseller Locator application. This tool helps potential customers in the U.S. find a product reseller in their state. By choosing a state from a drop-down box, a listing of all resellers located in that state is displayed.
Over the years, as more and more resellers have signed on to sell our products, some problems with this application have surfaced:
- Some states, such as California, display a very long list of resellers, and customers may never contact those listed near the bottom.
- The states with smaller populations such as North Dakota may not have any resellers to list.
- Competitors could use the tool to easily find all our resellers, and may steal these valuable partner relationships.
We needed a solution to solve these problems, and searching by zip codes appeared to be the answer. The new tool would ask the customer to enter their five digit zip code in a text box and select a search radius of 25, 50, or 100 miles. We wanted to limit the search to 100 miles, to keep the results to an appropriate number and prevent our competitors from entering 2,000 miles and getting a huge list all at once. For example, I might search for all resellers within 50 miles of 55113. This time a list of resellers in close proximity to St. Paul, MN, is displayed, ignoring those 200 miles north in the city of Duluth. Implementing this approach addressed each problem, respectively:
- A shorter list would result from the search, containing only the resellers located near the customer's zip code.
- The list can cross state boundaries, now that it will find all resellers located within the specified radius to the customer, and hopefully would show results for zip codes in states like North Dakota.
- Competitors can still use the tool to find our resellers, but they'll have to work much harder to get the information with the 100 mile limit.
I've used many store locator Web applications, such as finding the nearest Quiznos or Best Buy, and always wondered how they worked. Now I had the opportunity to learn something brand new, and I began my quest for how to accomplish the Reseller Locator zip code search by starting where everybody does: Google! I quickly found a great tutorial article with sample ColdFusion code on webmonkey.com. The article was written by Robert Capili and titled Proximity Searches for Fun and Profit. The stars were aligned that day, since Robert published his article three weeks before I started my project. It was perfect timing, because as I started reading, it became apparent that this was exactly what I needed to get my feet wet. In the article Robert discusses four primary ways to calculate zip code proximities:
- Pythagorean Theorem (remember this trig equation? a2 + b2 = c2)
- Spherical Law of Cosines (Pythagorean theorem for triangles drawn on a sphere)
- Haversine Formula (most accurate way to calculate distance on a sphere)
- Square Search (Robert's speedy solution)
Testing the Sample Code
Included in the sample code is a ColdFusion Component, zipfinder.cfc, that implements each of the four search methods. It also contains a testing template, zip.cfm, that has a basic search form, containing a zip code text box and radius text box. Finally, it contains a database file, zipDB. My first step to getting set up was a quick visit to our company's DB Admin, who helped me perform a restore of the SQL database file, zipDB. The database restore creates a single table that contains 29,470 zip code records. Next, I opened Application.cfm and modified the variable application.dsn to use the correct value for our datasource name. Now on to some real testing. I pointed my browser to the zip.cfm template and saw the search form. After entering a zip code and radius in the text boxes, what you get are four cfdumps of the recordsets returned from the CFC, as well as the execution times. Each query gets the city, state, zip code, and distance from the specified zip code. Table 1 and Table 2 show the partial output from a search of 55113.
I soon realized why he recommended the Square Search. The execution time was faster than each of the other methods, and the distance results were very close to the Haversine Formula. After a few more tests, it was soon time to put the final pieces together.
Integrating the Solution
Now I needed to take the recordset returned by the Square Search method and put it to use in my application. We have a database table (actually a view) of resellers that includes the field: zipcode. Nothing special here; most of us are familiar with SQL tables that contain address information broken out in separate fields. All I needed to do was create a new query against the reseller table, and make sure a reseller's zip code was found among the zip codes in the recordset returned by the CFC. The code and query looked like this:
<cfinvoke component="zipfinder" method="squareSearch" radius="#URL.miles#"
<cfif NOT results.recordcount>
Sorry, no zip codes found within #URL.miles# miles of #URL.zip#.
<cfquery name="get_resellers" datasource="#dsn#">
where zipcode IN (#ListQualify(ValueList(results.zip),"'")#)
and Country = 'USA'
order by CompanyName
The first block of code invokes the CFC, calling the SquareSearch method. Next, I verify at least one record is returned. If not, I stop right there and let the user know with a friendly error message. Last, I perform a search against our resellers, using the clause:
where zipcode IN (#ListQualify(ValueList(results.zip),"'")#)
Based on the sample records I listed earlier, the actual query might look like:
where zipcode IN ('55113','55108','55117','55103','55114','55104','55414','55101','55418')
and Country = 'USA'
order by CompanyName
The ListQualify() and ValueList() ColdFusion functions come in handy here. ValueList() converts a query column into a comma-delimited list, then ListQualify() slaps a single quote around each item in the list. This is exactly what is needed to use as the expression on the right-hand side of the IN clause. All that's left is to display the results from the get_resellers query in a nice HTML format, and the customer has the information he or she needs to make a couple of phone calls that will hopefully lead to a future sale!
The Internet of Things is not new. Historically, smart businesses have used its basic concept of leveraging data to drive better decision making and have capitalized on those insights to realize additional revenue opportunities. So, what has changed to make the Internet of Things one of the hottest topics in tech? In his session at @ThingsExpo, Chris Gray, Director, Embedded and Internet of Things, discussed the underlying factors that are driving the economics of intelligent systems. Discover how hardware commoditization, the ubiquitous nature of connectivity, and the emergence of Big Data a...
May. 30, 2015 04:00 PM EDT Reads: 6,454
Health care systems across the globe are under enormous strain, as facilities reach capacity and costs continue to rise. M2M and the Internet of Things have the potential to transform the industry through connected health solutions that can make care more efficient while reducing costs. In fact, Vodafone's annual M2M Barometer Report forecasts M2M applications rising to 57 percent in health care and life sciences by 2016. Lively is one of Vodafone's health care partners, whose solutions enable older adults to live independent lives while staying connected to loved ones. M2M will continue to gr...
May. 30, 2015 03:45 PM EDT Reads: 2,450
SYS-CON Events announced today that MetraTech, now part of Ericsson, has been named “Silver Sponsor” of SYS-CON's 16th International Cloud Expo®, which will take place on June 9–11, 2015, at the Javits Center in New York, NY. Ericsson is the driving force behind the Networked Society- a world leader in communications infrastructure, software and services. Some 40% of the world’s mobile traffic runs through networks Ericsson has supplied, serving more than 2.5 billion subscribers.
May. 30, 2015 02:00 PM EDT Reads: 1,541
Explosive growth in connected devices. Enormous amounts of data for collection and analysis. Critical use of data for split-second decision making and actionable information. All three are factors in making the Internet of Things a reality. Yet, any one factor would have an IT organization pondering its infrastructure strategy. How should your organization enhance its IT framework to enable an Internet of Things implementation? In this session, James Kirkland, Red Hat's Chief Architect for the Internet of Things and Intelligent Systems, will describe how to revolutionize your architecture and...
May. 30, 2015 01:00 PM EDT Reads: 741
The 4th International Internet of @ThingsExpo, co-located with the 17th International Cloud Expo - to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA - announces that its Call for Papers is open. The Internet of Things (IoT) is the biggest idea since the creation of the Worldwide Web more than 20 years ago.
May. 30, 2015 12:00 PM EDT Reads: 1,813
The enterprise market will drive IoT device adoption over the next five years. In his session at @ThingsExpo, John Greenough, an analyst at BI Intelligence, division of Business Insider, will analyze how companies will adopt IoT products and the associated cost of adopting those products. John Greenough is the lead analyst covering the Internet of Things for BI Intelligence- Business Insider’s paid research service. Numerous IoT companies have cited his analysis of the IoT. Prior to joining BI Intelligence, he worked analyzing bank technology for Corporate Insight and The Clearing House Pay...
May. 30, 2015 11:45 AM EDT Reads: 642
As the Internet of Things unfolds, mobile and wearable devices are blurring the line between physical and digital, integrating ever more closely with our interests, our routines, our daily lives. Contextual computing and smart, sensor-equipped spaces bring the potential to walk through a world that recognizes us and responds accordingly. We become continuous transmitters and receivers of data. In his session at @ThingsExpo, Andrew Bolwell, Director of Innovation for HP's Printing and Personal Systems Group, discussed how key attributes of mobile technology – touch input, sensors, social, and ...
May. 30, 2015 11:30 AM EDT Reads: 4,052
All major researchers estimate there will be tens of billions devices - computers, smartphones, tablets, and sensors - connected to the Internet by 2020. This number will continue to grow at a rapid pace for the next several decades. With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo, June 9-11, 2015, at the Javits Center in New York City. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be
May. 30, 2015 11:15 AM EDT Reads: 2,203
SYS-CON Events announced today that BMC will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. BMC delivers software solutions that help IT transform digital enterprises for the ultimate competitive business advantage. BMC has worked with thousands of leading companies to create and deliver powerful IT management services. From mainframe to cloud to mobile, BMC pairs high-speed digital innovation with robust IT industrialization – allowing customers to provide amazing user experiences with optimized IT per...
May. 30, 2015 11:15 AM EDT Reads: 1,118
The world is at a tipping point where the technology, the device and global adoption are converging to such a point that we will see an explosion of a world where smartphone devices not only allow us to talk to each other, but allow for communication between everything – serving as a central hub from which we control our world – MediaTek is at the heart of both driving this and allowing the markets to drive this reality forward themselves. The next wave of consumer gadgets is here – smart, connected, and small. If your ambitions are big, so are ours. In his session at @ThingsExpo, Jack Hu, D...
May. 30, 2015 11:15 AM EDT Reads: 878
Today’s enterprise is being driven by disruptive competitive and human capital requirements to provide enterprise application access through not only desktops, but also mobile devices. To retrofit existing programs across all these devices using traditional programming methods is very costly and time consuming – often prohibitively so. In his session at @ThingsExpo, Jesse Shiah, CEO, President, and Co-Founder of AgilePoint Inc., discussed how you can create applications that run on all mobile devices as well as laptops and desktops using a visual drag-and-drop application – and eForms-buildi...
May. 30, 2015 11:00 AM EDT Reads: 5,520
The Internet of Things is not only adding billions of sensors and billions of terabytes to the Internet. It is also forcing a fundamental change in the way we envision Information Technology. For the first time, more data is being created by devices at the edge of the Internet rather than from centralized systems. What does this mean for today's IT professional? In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists will addresses this very serious issue of profound change in the industry.
May. 30, 2015 11:00 AM EDT Reads: 1,062
The multi-trillion economic opportunity around the "Internet of Things" (IoT) is emerging as the hottest topic for investors in 2015. As we connect the physical world with information technology, data from actions, processes and the environment can increase sales, improve efficiencies, automate daily activities and minimize risk. In his session at @ThingsExpo, Ed Maguire, Senior Analyst at CLSA Americas, will describe what is new and different about IoT, explore financial, technological and real-world impact across consumer and business use cases. Why now? Significant corporate and venture...
May. 30, 2015 11:00 AM EDT Reads: 731
WebRTC defines no default signaling protocol, causing fragmentation between WebRTC silos. SIP and XMPP provide possibilities, but come with considerable complexity and are not designed for use in a web environment. In his session at @ThingsExpo, Matthew Hodgson, technical co-founder of the Matrix.org, discussed how Matrix is a new non-profit Open Source Project that defines both a new HTTP-based standard for VoIP & IM signaling and provides reference implementations.
May. 30, 2015 10:30 AM EDT Reads: 5,257
SYS-CON Events announced today that O'Reilly Media has been named “Media Sponsor” of SYS-CON's 16th International Cloud Expo®, which will take place on June 9–11, 2015, at the Javits Center in New York City, NY. O'Reilly Media spreads the knowledge of innovators through its books, online services, magazines, and conferences. Since 1978, O'Reilly Media has been a chronicler and catalyst of cutting-edge development, homing in on the technology trends that really matter and spurring their adoption by amplifying "faint signals" from the alpha geeks who are creating the future. An active participa...
May. 30, 2015 10:30 AM EDT Reads: 928
"People are a lot more knowledgeable about APIs now. There are two types of people who work with APIs - IT people who want to use APIs for something internal and the product managers who want to do something outside APIs for people to connect to them," explained Roberto Medrano, Executive Vice President at SOA Software, in this SYS-CON.tv interview at Cloud Expo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
May. 30, 2015 10:30 AM EDT Reads: 4,412
There will be 150 billion connected devices by 2020. New digital businesses have already disrupted value chains across every industry. APIs are at the center of the digital business. You need to understand what assets you have that can be exposed digitally, what their digital value chain is, and how to create an effective business model around that value chain to compete in this economy. No enterprise can be complacent and not engage in the digital economy. Learn how to be the disruptor and not the disruptee.
May. 30, 2015 10:15 AM EDT Reads: 778
2015 predictions circa 1970: houses anticipate our needs and adapt, city infrastructure is citizen and situation aware, office buildings identify and preprocess you. Today smart buildings have no such collective conscience, no shared set of fundamental services to identify, predict and synchronize around us. LiveSpace and M2Mi are changing that. LiveSpace Smart Environment devices deliver over the M2Mi IoT Platform real time presence, awareness and intent analytics as a service to local connected devices. In her session at @ThingsExpo, Sarah Cooper, VP Business of Development at M2Mi, will d...
May. 30, 2015 10:00 AM EDT Reads: 783
Thanks to widespread Internet adoption and more than 10 billion connected devices around the world, companies became more excited than ever about the Internet of Things in 2014. Add in the hype around Google Glass and the Nest Thermostat, and nearly every business, including those from traditionally low-tech industries, wanted in. But despite the buzz, some very real business questions emerged – mainly, not if a device can be connected, or even when, but why? Why does connecting to the cloud create greater value for the user? Why do connected features improve the overall experience? And why do...
May. 30, 2015 09:45 AM EDT Reads: 797
Almost everyone sees the potential of Internet of Things but how can businesses truly unlock that potential. The key will be in the ability to discover business insight in the midst of an ocean of Big Data generated from billions of embedded devices via Systems of Discover. Businesses will also need to ensure that they can sustain that insight by leveraging the cloud for global reach, scale and elasticity.
May. 30, 2015 09:30 AM EDT Reads: 6,679