The District of Columbia

High Tech Development Zones (TechZonePly)

High Tech Development Zones (TechZonePly)

by Executive Office of the Mayor on 06/29/2005

Keywords
About: economy, boundaries, Development, Incentives, planningCadastre, Business, Technology, Technology Zones, Poverty
Taking place at: Washington, D.C., District of Columbia, DC, DC GIS, DCGIS

Abstract

High Tech Development Zones. The dataset contains locations and attributes of High Tech Development Zones, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies.

This layer is a union of enterprise zones, priority development areas (PDA), and metro development areas (MDA), with minor modifications. Each polygon is a tech zone with some coded as low level (10-20% poverty level) and high level (over 20% poverty level) zones with the merging of the MDA and PDA zones.

A legislation and sources from the DC Executive Office of the Mayor (EOM) for Planning and Economic Development identified High Tech Development Zones and DC GIS staff geo-processed the data.

All DC GIS data is stored and exported in Maryland State Plane coordinates NAD 83 meters.

METADATA CONTENT IS IN PROCESS OF VALIDATION AND SUBJECT TO CHANGE.

Purpose

This data is used for the planning and management of Washington, D.C. by local government agencies.

Access constraints

Contact OCTO GIS. Any data obtained outside of OCTO GIS are unauthorized copies.

Use constraints

Data cannot be redistributed in any manner without written authorization. OCTO makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.

Point of contact

GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5 pm

Credits

DC Executive Office of the Mayor (EOM) for Planning and Economic Development; New Economy Transformation Act of 2000 (NET 2000) legislation

Data accuracy

Accuracy
Data believed to be complete and accurate, subject to change. Digital version compared with original source data for accuracy and completeness. Validated by source and/or responsible agency.

Logical consistency
In process of validation by source and/or responsible agency.

Completeness
Data believed to be complete and accurate, subject to change. Digital version compared with original source data for accuracy and completeness. Validated by source and/or responsible agency.

Horizontal positional accuracy
In process of validation by source and/or responsible agency.

Vertical positional accuracy
N/A

Lineage / Sources

Lineage / Processes
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer



fax: (202) 727-5660
hours: 8:30 am - 5 pm

Data Collection:

Through the application's functionality and usability requirements, OCTO GIS staff compose a list of data layers needed for the application. From this, staff determine the appropriate source and location for each layer, and assess the effort needed to get it.

Some layers, already part of the DC Atlas, are incorporated into the data store. For DC agency data, agency liaisons ask DC personnel about data availability and acquisition. For third-party data, OCTO-GIS evaluates options and either finds alternatives, purchases, or licenses the data. In some cases, staff create data from existing sources and then add required attribution.
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer



fax: (202) 727-5660
hours: 8:30 am - 5 pm
Data Preparation:

High Tech Development Zone boundaries follow the legal boundary descriptions from the DC Council and the Office of the Deputy Mayor for Planning and Economic Development (EOM), as stated in the National Capital Revitalization Corporation Act of 1998. Tech Zone boundaries are partly a combination of Metro Development Areas (MDA), Priority Development Areas (PDA), and the federal enterprise zones.

Staff merged the enterprise zone shapefile, which is a subset of the 1990 census tracts, with the PDA and MDA layers. Originally, census tracts were topologically created using the snapbase, by snapping select shared vertices between the two layers together in an established ArcGIS 8.1 snap environment. This formed coincident geography with other DC GIS datasets. Also, PDA and MDA polygons were generated from heads-up digitization, at 1:10000 scale, using the planimetrics as a base. Staff performed minor corrections and updates to the tech boundaries in 2003.

After an initial effort at establishing the areas, OCTO GIS staff coordinated with the Office of the Deputy Mayor for Planning and Economic Development to review each boundary against the appropriate legal description. Where needed, staff adjusted the mapped boundaries to fit legal descriptions using the "Shared Edit Tool" and the snapping environment.
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer



fax: (202) 727-5660
hours: 8:30 am - 5 pm

Data QA/QC

After data preparation, the data team performs qa/qc. Various processes check the following parameters: 1.) spatial and attribute accuracy; 2.) data usability; 3.) data dictionary adherence; 4.) specialized metrics, such as connectivity and directionality; and 5.) data load success. These checks are, as follows:

Visual - staff perform a structured visual check of the data, using on-screen, plotting, and customized routines, and, at times, comparing it to the source documents.

Edge-matching - For grided datasets, staff review the spatial capture, connectivity, and attribution of data across tile boundaries, where applicable.

Automated - Staff compare the data to documented standards and source files through automated procedures and reports.

Specialized - Staff review more specific data parameters, such as directionality, connectivity , and topology.

Edit Verification - Staff ensure that previous errors are fixed to specifications.
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Field Verification - Occasionally, through field work, team members compare the GIS data with the real world.

Data Loading - Staff evaluate the success and evaluate the process of loading raw data into a structured database.

Since most of the data use addresses as the spatial reference, staff compare the data against base layers (buildings, roads, street centerlines, owner-points, parks, and orthophotography) and move features where needed.

In some cases, OCTO GIS personnel produce maps and reports for source agency review. Through an iterative process, staff modify and enhance the layer to agency specifications. For some datasets, the agency endorses the final product for data load and publication.
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer



fax: (202) 727-5660
hours: 8:30 am - 5 pm

Final Data Preparation:

For final preparation, staff ensure all of the needed items are present (unneeded items are deleted), the metadata is complete and current, the shapefile is in the proper projection, and a spatial index exists. If not already done, a GIS_ID (unique id for features in the layer) is computed with automated tools.
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer



fax: (202) 727-5660
hours: 8:30 am - 5 pm

Data Load:

After final preparation, OCTO GIS staff load the data into the application's test database, where SDE handles the spatial data and ORACLE manages the attribute information.

First, staff add primary key and name fields to the layer. Second, personnel register the layer into the appropriate tables and establish the unique feature-ids (the link between the spatial object and its attributes) specific to that layer. Then, staff populate feature, search, address, web url, contact, data source, and other tables, where applicable. For point layers, team members calculate each feature's geographic extent and populate the features table. Lastly, each layer is intersected with the base geography (2002 Advisory Neighborhood Commission areas, 2002 wards, zip codes, neighborhoods, and neighborhood clusters) to populate the "what's-within" tables for the web reports. Views are refreshed when needed.
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer



fax: (202) 727-5660
hours: 8:30 am - 5 pm

Data Load QA/QC

OCTO GIS performs spatial checks comparing the test SDE database with source files to check for completeness, spatial integrity, and proper attribution. First, staff compare the test database contents with documented standards. Then, team members check the geography and attribution, as well as compare dataset parameters between both layers.

The data team performs attribute checks on the ORACLE database to ensure the existence and validity of views. Again, staff compare the database contents with documented standards. For critical views, personnel check the view structures and data against source files and documentation.
GIS Data Coordinator
in Office of the Chief Technology Officer

441 4th st NW, Suite 930 South
Washington DC, 20001, USA

fax: 202-727-5660
hours: 8:30am - 5:00pm
OCTO GIS staff reviewed this layer for any changes with none to post at this time.

Distribution

Most DC GIS datasets can be downloaded from "http://dcgis.dc.gov" on the data center page. Orders can also be made by contacting OCTO GIS at "dcgis@dc.gov", especially for datasets not available for download.

Distribution liability
OCTO makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a particular use, nor are any such warranties to be implied or inferred, with respect to the information or data furnished herein. Subject to terms and conditions of the Memorandum of Agreement. Memorandum of Agreement must have authorized signature.

Distributed by
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5 pm

Entity

DCGIS.TechZonePly

Attributes

  • DESC1
    Zone subtype description
  • Shape / ESRI
    Feature geometry.
  • GIS_ID
    Sequential OCTO GIS identifier that links points and polygons.
  • WEB_URL
    Web URL link
  • TRACTNO
    1990 Census Tract ID
  • OBJECTID / ESRI
    Internal feature number.
  • SHAPE / ESRI
    Feature geometry.
  • SHAPE.AREA
  • SUBTYPE_1
    Zone subtype code
  • SHAPE.LEN

Metadata

FGDC Content Standards for Digital Geospatial Metadata / FGDC-STD-001-1998 as of 06/26/2008

Provided by
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5 pm