GIS Outsourcing

GIS Implementation Plans

GCT develops basic, easy to read GIS implementation plans.   The main purpose of the plan is to determine what data and computer systems are available for the project so it can be determined what each phase of the project will cost.  The highlight of the plan is a detailed cost breakdown of each task so that the project can be properly budgeted.

Technical and Software Support

GCT utilizes all available tools and technologies to extend the capabilities of the desktop GIS software for analysis and editing.  GCT has extensive experience in database managers including Oracle and Microsoft SQL. GCT has been business partners with ESRI for over 15 years and has mastered all of their software products including the latest versions of ArcGIS Desktop and ArcGIS Server.  Built using a client’s existing RDBMS, ESRI’s ArcGIS Server Technology extends the personal geodatabase model to enable multi-user editing and versioning, as well as enforcing data-integrity controls.  This powerful tool has enabled GCT to assist clients with scaling their GIS to accommodate multiple editors across multiple sites, and to ensure that their data is secure.

Our technical staff has extensive experience outside the desktop realm, including database management for efficient storage and delivery of geospatial data.  We have developed over 30 GeoPortal websites for cities and counties throughout the south using ArcIMS and have converted most of those sites to ArcGIS Server. All new sites are developed using ArcGIS Server with a customized user interface developed in HTML 5/JavaScript for use across many computer platforms, operating systems, and mobile devices.

Aerial Photography

GCT doesn’t produce aerial photography, but chooses the best type of photography and images for each project. We develop specifications and contracting services for entities wanting to purchase digital ortho-photography directly.  GCT can also obtain the photography needed as part of a comprehensive GIS development project.

Planimetric Conversion

GCT can create vector representations of surface features from the digital photography.  These usually include street edge, water edge, and building outlines.  This is not required to develop the other information needed as described below, but is makes any map products produced within the GIS much easier to comprehend.

GPS Services

GCT has extensive experience in sub-meter GPS surveying.  We can perform the survey, train your staff to perform the survey, or a combination of both.  This experience includes water, sewer, gas, electric, drainage, signs and traffic signals.

Parcel Conversion

GCT has extensive experience in creating parcel coverages linked to tax rolls. Using subdivision plats, tax roll descriptions, deeds and other sources, GCT can create parcel polygons over the aerial photography attributed with the tax assessor’s parcel identifier number.  During this process, GCT can also produce a separate layer for subdivisions and lots. The lots can then be attributed with subdivision name, block number, lot number, zoning, flood zones, and any number of other characteristics required by the project.

Street Centerlines

Using the MSAG, 911 records, field surveys, and other sources, GCT can create a street centerline file attributed with street name and high/low, right/left address ranges. This product is suitable for any Computer Aided Dispatch (CAD) system.  GCT can also add additional information for 911 systems including ESN and ESZ as required.  Street maintenance departments can also use this dataset.  Each street segment can be attributed with width, material, a condition grade(s) and maintenance history.  This will allow for developing plans for fixing street that are fast and flexible.

Point Addressing

Using utility billing data, field surveys, and other data sources, GCT can create a point for each established address.  These points will be located within the building on the aerial (or building outline on the planimetrics).  Building with multiple addresses will have multiple address points.  Addresses that have multiple unit numbers (i.e. apartments) can also be incorporated into the point address dataset.


Using a GPS survey of a utility system, as-built drawings and other sources, GCT can create layers for your utility system including water, sewer, gas and electric.


Using the aerials, GPS surveys, as-built drawing, drainage studies, LIDAR and other sources, GCT can create a drainage layer for your GIS.  This can include major drainage channels, roadside ditches, culverts, and subsurface drainage.  This data set can also include drainage basins, FIRM flood zones, lift stations and other information necessary for the project.

Planning Datasets

GCT can create datasets over the aerials or parcels for planning agencies.  These include polygons representing zoning, land use, historical districts, and U.S. census data (tracts, block groups, and blocks).

General Boundaries

Other boundaries can be created over the developing base map including county, city, taxing, voting, and zip codes as required.

User Interfaces

GCT specializes in developing user interfaces that are simple to use and easy to learn.  Our programmers create scripts to automate any function that GIS software can perform.  These interfaces can be created around the traditional work station/server model or for an Internet web site. The interface is delivered with the data bases created and GCT supplies on-site training on how to use and maintain the system.

Web Hosting

GCT can host your GIS web site for you.

Ongoing Support

After the system is up and running, GCT is available to assist with phone, on-line, and on-site support.  This would include adding additional functionality, ongoing training, database maintenance, troubleshooting and consultation.