Gis model of analysis to promote tourism through the use of a web application
Modelo Gis de análisis para promover el turismo a través del uso de una aplicación web
Yuri Vanessa Nieto Acevedo1, Oswaldo Alberto Romero Villalobos2, Kelly Johanna Gallo Ramírez3
1 Universidad Distrital Francisco José de Caldas, Bogotá, Colombia, firstname.lastname@example.org
2 Universidad Distrital Francisco José de Caldas, Bogotá, Colombia, email@example.com
3 Universidad Distrital Francisco José de Caldas, Bogotá, Colombia, Kjgallor@udistrital.edu.co
How to cite: Nieto, Y. V., et al., GIS model of analysis to promote tourism through the use of a web application, TECCIENCIA, Vol. 9 No. 17., 29-36, 2014, DOI: http://dx.doi.org/10.18180/tecciencia.2014.17.4
Received: 16/Aug/2014 Accepted: 20/Sep/2014 Published: 30/Nov/2014
The sustainable development of tourism in little-known towns needs the support of web applications and GIS (Geographic Information System) technology. The aim of this paper is to provide a GIS Model of Analysis integrated into a Web Application called Turichia in order to promote tourism in Chía, a small town in Cundinamarca, Colombia, near Bogotá.
The assembly of this web application includes different servers that use ESRI services like Geocoding, Network Analytics, and Web Feature Services and other Geoprocessing operations built in ArcMap for this specific purpose.
Keywords: ArcGis Viewer for Flex, Geographic Information System (GIS), Point of Interest (POI), Tourism, Web Feature Service (WFS).
El desarrollo sostenible del turismo en los pueblos no reconocidos necesita el apoyo de las aplicaciones web y la tecnología SIG (Sistema de Información Geográfica). Este artículo describe el análisis de un modelo sig para el desarrollo de una aplicación web denominada Turichia, desarrollada para promover el turismo en Chía, un pequeño pueblo de Cundinamarca, situado cerca de Bogotá-Colombia.
El montaje de esta aplicación web incluye diferentes servicios consumidos desde ESRI como lo son: Servicios de geo codificación, Red Analítica y Web Feature y otras operaciones de geo procesamiento construidas en ArcMap para este propósito específico.
Palabras clave: ArcGIS Viwer para Flex, Puntos de interés (POI), Sistemas de información geográfica (GIS), Turismo, Web Feature Services (WFS).
Tourism is considered a potential sector to develop the economy of a region. Little-known towns are lagging behind main towns where people easily find Points of Interest (POI). Tourism in Bogota, as the principal city of Colombia, has rapidly increased in recent years and relies on a number of websites that inform and help people to tour the city. Nevertheless, small bordering towns with interesting places to visit, as is the case with Chia, do not use web applications to help inform tourists about the location, how to get there, and other fundamentals to increase the tourism in the region.
As the internet becomes increasingly accessible to large populations , tourism in these bordering towns can be positively impacted if cloud-based tourism applications are developed for public use. The Geographic Information System (GIS) is a computer system that allows you to access, save, understand, and display spatial information. GIS technology is already widely used in disciplines such as cartography, geographic, geology survey, environmental management, and urban planning, and has become essential in each of these fields .
One finds software on the market such as ArcGIS, QuantumGIS, PostGIS, and others that are useful for the objective of tourism promotion through the construction of specific geoprocessing tools and the use of cloud-publishing services . This paper presents a GIS Model of Analysis developed in ArcMap, ArcGIS Server, and ArcGIS Viewer for Flex for display in a web application deployment.
2. Related work
The tourism management method developed by Balqies  proposes steps for starting a GIS system for tourism, emphasizing the collection of spatial data. Nisar  addresses a related topic, describing in his research the effects of Digital Maps on the tourism industry. However, this research does not solve the problem for small towns where cartography and digital maps are not available with topology or in a tolerable resolution, nor with spatial references for points of interest. This is the reason behind this research project - to show where to find maps already in good shape for tourism applications, when it is convenient to use digital map services or not, and how to reference points of interest using already-existing tools.
Several companies provide geographic information services. Yahoo Local Maps and Google Maps display search results on a map interface . Tomomichi  analyzes the quality of data in OpenStreetMap (OSM), which is the geographic information used as the base map for Turichia. The data summarizes the quality needed for geographic information for a specific town  :
- Positional accuracy
- Attribute accuracy
- Logical consistency
- Semantic accuracy
- Usage, purpose and constraints
- Temporal quality
To ensure high efficiency, flexibility, scalability for the WebGIS system, the system uses enterprise architecture, related to what Yang  proposes in his research to represent his system architecture. The system is divided into a Database layer, GeoServices layer and Client layer, as shown in Figure 1.
3.1. Database Layer
Once the objectives of the Tourism Web Application are defined, the work starts by collecting all types of data in different forms and shapes to build a GIS, followed by the procedures explained below. The collected data needs to be divided into two main types: Spatial data and Attribute data .
3.1.1. Defining spatial data
Spatial data is related to space and its position on the surface of the earth . The Mayor's Office of the town of Chia has provided the street level data of the town in AutoCAD, but this represents a big challenge to the project due to the fact the data has to be converted into a shape file with topology  to be subsequently used in ArcGIS 10.2, which is the main software used to develop this project. Nonetheless, OpenStreetMap (OSM) already offers a good-quality street map for the town replete with topology that is available for use in ArcGIS and is thus the base map for this project, similar to the alternative solution proposed by Marek  in his route planning model using OSM.
3.1.2. Defining attribute data
This information is limited in Chia, since it is a small town that has not explored tourism - indeed, they have not had data on points of interest collected. This data is gathered by the Mayor's Office in table form with names and addresses. Points of Interest (POI) situated in mountains or villages are located using OSM by residents of Chia who have lived in the town and known it for a long time. These POIs are categorized into nine groups: administrative, gastronomic, cultural, recreational, religious, safety, health, malls, and bars.
3.1.3. Data processing:
In order to georeference the Points of Interest, Google Maps is used to locate the latitude and longitude of each POI, employing the WGS84 geographical coordinate system . Because POIs are a kind of data point which are not affected by distortion, as can occur with polygon data, it is not necessary to establish a projection system. All of this takes as reference the work developed by Ardizzone  and List  to extract tourism information using Google Maps.
3.1.4. Building a geodatabase:
Here, information about features is provided in tabular form to allow analysis with clear presentation and real interaction with the needed information . This form contains attribute data such as the identification number, name, latitude, longitude, description, address, telephone number, and website. It is an Excel spreadsheet that is exported using the ArcMap function AddXY to convert it into a shapefile. ArcCatalog is employed to set up the new geodatabase: the POI data set and the feature classes, or the nine categories established above. Then, an enterprise geodatabase is created using ArcToolBox. Roi , in his research on constructing databases in ArcGis, describes a methodology to attain this same objective using ArcSDE services . In the case of the Web Feature Service, it is recommended to use a relational database that supports spatial data types such as PostGis, MySQL, Oracle, SQL, etc. . Using the query language offered by SQL, a requirement statement is created to georeference each POI, creating a new field on the table as a type of geographical data, as follows:
SET [GEOLUGAR] =
('POINT(' +CAST(LONGITUD AS
VARCHAR(20)) + ' '+CAST(LATITUD AS
VARCHAR(20)) + ')', 4269)
This expression takes the data in the fields of latitude and longitude and makes them spatial data in the new field Geopoint, taking the SRDE code 4269, which is an ArcGIS Dynamic Map Service Layer with a Spatial Reference WKID . It is also important to create a default instance with a password while SQL is being installed in order to avoid issues with the connection to the database.
3.2. Generating Services
As a result of the analysis of the requirements made through UML  in the construction of the Use Case diagram and the Class diagram for an application that is expected to promote tourism using GIS technology, two kinds of services are generated, such as geoprocessing operations built in ArcMap and servers accessed from ArcGIS Online.
The client for this kind of web application needs answers to questions such as, "What Points of Interest are there in this town?," "Where are they located?," "How can I get there?,"  "What is the nearest POI to me?," "Which POIs are located near my radius area?," "Where is this address?," and "Can I contribute to this web application by adding/editing POIs?". In order to answer these questions, the following services are built:
3.2.1. Geoprocessing services using ArcMap
Using the ArcToolBox, geoprocessing models are created using tools such as select, near, join field, buffer, and clip:
Query and Search: Using ArcMap, the already-created GeoDatabase is uploaded. It is necessary to fill the Map properties file and to save the .mxd file to subsequently publish the service. The URL that results from this procedure is later used in ArcGis Viewer for Flex. This is similar to the methodology used by Quian-quian  in his research.
Nearest distance: Using the select tool, the client can choose the place where he is located, followed by the near tool to determine the nearest POI. Finally, with the join field tool, the client can visualize the attributes of this POI. Figure 2 shows this model.
POI within a radius ring: This model is similar to the nearest distance model explained above. Nevertheless, this model includes the buffer tool to determine the radius in meters to the client's location where POIs can be found. The model is shown in Figure 3.
It is vital to configure the input and output data as parameters in order to enable clients to pick existing data.
3.2.2. Servers accessed from ArcGIS online
Once all servers are integrated into ArcGIS Viewer for Flex, it is possible to access the servers offered by ArcGIS Online. In this section, only the servers and their functionality are explained. However, web application integration will be discussed in the next section with the results from ArcGIS Viewer for Flex.
Network Analysis: This method is based on graph theory and operational research and is used as a method for geographic modeling and urban infrastructure networks. It is applied for the optimum allocation of resources, the search for the shortest path, and so on 
Using the Network Analysis module from ArcGIS Online, as Yang  proposes, it is possible to answer the question, "How can I get there?" Besides, there are other complementary options, such as add a barrier, calculate time and distance, and show the step by step sequence.
Geocoding: This method find associated geographic coordinates from other geographic data such as street addresses or ZIP codes . In Turichia, the service accessed from ArcGIS Online permits the location of an address using a single input field, in this case the address. The output point can be visualized on the map. Once the address is entered, a dashboard with the possible location options is shown, with the aim being that the client can choose the more accurate option.
Web Feature Service (WFS): This is an ArcGIS Online service that enables a client to retrieve geospatial data encoded in Geography Markup Language (GML) online through HTTP protocol. It allows clients and servers of different vendors or systems to share data without having to convert data between proprietary formats. The WFS server is thus a featured online resource, providing an interface for data access and manipulation. WFS enables crowdsourcing, due to the fact end users can add and edit existing POIs. A request sent to the WFS server is a query (or transformation operation) for one or more features that can be delivered by a server. When WFS receives the request, it executes the function for the request and sends the information back to a client. WFSs communicate with a client and allow programs written in different languages and on different platforms . The workflow of the WFS process service is shown in Figure 4.
The key design feature of the WFS service system is to satisfy the user request for different versions of WFS services . In order to enable the multi-version WFS service, a spatial database is created in SQL to ensure clients can access reliable data without affecting the geodatabase previously created in ArcCatalog. This means Turichia has two databases to protect data. Clients add and edit attribute data directly from the SQL database. For future work, we propose the creation of a database administrator role to approve WFS operations and upload and make changes to the geodatabase.
3.3.Integrating the Web Application using ArcGIS Viewer for Flex
Flex Viewer is the use of ArcGIS API for Flex and Flex Framework for design and implementation, which can be removed for the display of (out-of-the-box) rich Internet applications, supported by ArcGIS Online, ArcGIS Server and other access services (GeoRSS, etc.). Flex has extensive libraries for developers that enable developers to build an efficient, powerful, and aesthetically beautiful internet application more easily . It is necessary to configure five tabs or modules, such us:
Extension: In this tab it is imperative either to add a base map or choose one map from the ones available. Due to the fact that the digital map of Chia was not of good resolution, as was previously mentioned, Open Street Map is used as the base map. Additionally, the SQL spatial database is arranged as the operational layer, already connected as an enterprise geodatabase.
Widgets: The widget module is designed to reduce heavy complex programming work such as map management, map navigation, application configuration, and communication between components. Developers can thus focus on the development of core business function. Only in the Flex Viewer configuration file for adding configuration items can this work in the form of rapid display control from within the existing Flex Viewer application . Through the URL resulting from the published services on ArcMap, the developer makes a call to the services and uses the already existing ones on Flex. The widgets that Turichia uses are represented in Table 1.
Composition: This module allows the developer to edit and activate the dashboard function for the application such as the scale bar, coordinates, navigation, URL, general view map, search panel, etc.
Design: The design tab enables the developer to edit titles, letter style, color scheme, and transparency, and allows the uploading of an image for the application logotype.
Preview: This module is an interactive preview of the application and where all previously-setup functions can be executed. This tab also generates a URL application for subsequent use . Initially, Turichia has the IPs http://10.20.161.100/turichia or http://turichia.udistrital.edu.co for academic example. The infrastructure will subsequently be installed at the Universidad Distrital server and configured with a publicly assigned IP; in the meantime, this IP address and Web Address is an example for reference.
Based on the system architecture above, this model has deployed a version of the Flex Viewer application as a practical system. The application is shown in Figure 5.
The services provided by the application can be seen as follows:
When the query application is executed, a dashboard pops-up on the left to show all the Points of Interest registered on the geodatabase, as shown in figure 6. Initially, the application has forty-five entities. Once the end user clicks on the query widget, a new dashboard displays information about the selected POI.
The Locator application allows the end user to insert the address he is looking for into a textbox. This uses geocoding services to locate addresses on the map. It also finds related addresses in order to allow the client to choose the most accurate search result. The dashboard also displays scores based on geocoding proximity which are not lower than 97 points out 100 for Turichia, as shown in figure 7. It is necessary to configure the Chia area into the preliminary options of Viewer for Flex so that the application does not pull up addresses from out of the area of the town.
One of the services that we are creating, modeling, and publishing for Turichia is locating POIs within a radius ring. When the widget is activated, a new dashboard allows the end users to indicate the radius area in meters. A scaled grey shadow appears on the map, indicating the radius and the POI content inside this buffer. The information about each POI is shown when the user clicks on it. The results of the application on Turichia are shown in figure 8.
The Web Feature Service is the only service that works in Turichia with the SQL database, as explained above. This service allows the end user to add and edit POIs included in the SQL database. Nevertheless, these new POIs are not available to be searched or used by other services. This is because the connection between the Geodatabase and the SQL database has not been established. It is recommended for future work to create an administrator role with the aim of approving WFS operations and uploading and making changes on the Geo Database. With these services, other options can be explored, such as uploading photographs or videos of visited places. The WFS service in Turichia is shown in figure 9.
A model of analysis has been proposed using ArcGIS as the main software to develop and deploy a web application to promote tourism. Building a GIS system for tourism is a great start in planning for better services in any city. This model of analysis was tested in Turichia and works as a methodology for creating new tourism applications, including mobile applications, desktop applications, web browser applications, etc., for other towns with a simple change of the base map and the operational databases - in other words, by changing the city information, the same model could be applied.
To conclude, we expect it to soon include the role of approving operations organized in WFS, creating route-planning suggestions, inserting photographs of POIs, and so on.
Developing web GISs based on Flex Viewer is a current trend, due to the fact that it is an easy non-programming method of creating applications where models constructed in ArcMap and services that are already on the cloud can be integrated. As a friendly and helpful application for tourists, it provides social benefits for the town. Moreover, it provides a good mechanism for documenting, conserving, and monitoring Points of Interest in a town.
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