Using gis in hvtl a case

Click here to View figure Data collection In cooperation with the Sfax municipality and nomena fieldwork, the following data have been gathered and processed in suitable forms vectors, tables, and raster:

Using gis in hvtl a case

Number of sheet in series The scanned as-built drawings in TIF format were "hot-linked" to the respective project polygons.

This allows users to access the source drawings at any time to see the highly accurate and detailed as-built drawing. In addition, users can locate certain projects by querying the project polygon coverage. Further attribute information was developed in this phase.

In addition to pipe material and diameter developed in Phase 1, all features now had the following attribute information: Additional attribute data was integrated in other special cases where data was readily available, or the need for the data was of paramount importance.

An example of where this data integration played an important role was with the lift station file.

Using gis in hvtl a case

It had been stored in digital tabular format. The point locations were determined and this tabular data was tied back to them. This added a spatial perspective to the previously tabular-only lift station data and allowed another type of access to this data.

MCES provides service to certain areas within neighboring St. A separate basemap was obtained from St. Not only is this helpful in operating and maintaining the existing utilities, it is helpful to have the basemap information for planning, and inter-utility coordination issues.

For the previous four years, there had been no updates to the County parcel basemap. Thus, post plats were not in the system. Without a basemap, two problems existed. First, utilities could not be input accurately relative to the basemap. Second, many of the functions that MCES had in mind would not be able to be accomplished without basemap information.

Therefore, a task was included to update the basemap. Of course, many subdivisions and commercial lots had been platted in those four years. Developers and their engineering consultants submitted these plats in CAD format on diskette according to a County ordinance.

How do I get going?

MCES took the initiative to create a coverage of new plats, that could be overlayed on the basemap. The new parcels were "best fit" to the existing parcel map and parcel control number was entered to facilitate future data linkage.

Creating the coverage of new plats came with many challenges. A plethora of engineering consultants had created the drawings and therefore each of the plats had to be handled separately for conversion.

For example, the drawings had various combinations of layering and coordinate bases. The disorganization of these files, and subsequently the amount of time required to create the master file, has resulted in better standards for digital plat submittal.

One feature that was added to the GIS in this phase was the water and wastewater plants and associated data. These locations were "on-screen digitized" as point features and, to supplement the point representation of the plants, a more detailed plant coverage was created which outlined tanks, buildings, and other objects visible from aerial photography.

Orthographic aerial photography was used in this exercise. In addition, oblique aerial photographs of the plants were hot-linked to the point features. Finally, approximately record drawings of the plant details were scanned and made available in concert with the GIS system. Wells and related data were also entered in to the GIS.

Attributes such as coordinates, flow, and well-field buffer zones were added as well. Two well-field buffer zones were integrated with the GIS a third zone will be added in Phase 4.We apply our framework to a HVTL case in California where community based opposition was effective due to the perceived high risk of the project and where trust in institutions was low.

A Geographic Information System, or GIS, is a computer-based system to collect, organize, manage, analyze and display the geographical locations and the descriptions of objects of interest.

In the. May 11,  · Summary of Power Line GIS Use Cases in Oregon Draft Prepared on 3/2/ for the Utilities FIT Power Line Work Group (PWG) Introduction. This document includes brief summaries of several different use cases for power line GIS data in Oregon.

Using GIS Kit: The ‘Kit’ version of this software is intended to allow individuals to collect accurate & sophisticated field data without being tied to an expensive server or IT unit. Anyone can easily create their own feature classes & datasets and use them to gather & interpret useful data in the field.


Tsunami Risk Analysis and Disaster Management by Using GIS: A Case Study in Southwest Turkey, Göcek Bay Area building and road layers are digitized from the satellite image.

To detect the inundated areas, a tsunami simulation has been performed by NamiDANCE software. Using GIS, we identified approximately households living within the corridors and we contacted them by letter informing them that they had been selected as potential participants in a survey promoted by the Piedmont Region and the University of Turin.

Using gis in hvtl a case
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