Table 6-5b Top Land Freight Crossing Ports, Mexican-U.S. Border: 1996

(Thousands of truck or rail car crossings)

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Figure 2-2b Percent Change in Personal Consumption Expenditures for Transportation by Major Subcategory: 1990 to 1996

Notes and sources: See Table 2-2.

Table 1-2 Area

(Number of square kilometers)

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Chapter 1 - Introduction

Quality of data has many faces. Primarily, it has to be relevant (i.e., useful) to its users. Relevance is achieved through a series of steps starting with a planning process that links user needs to data requirements. It continues through acquisition of data...

Chapter 6 - Evaluating Information Quality

Once a data system exists, the key to achieving and maintaining a high level of data quality is to regularly assess all aspects of data quality to improve the data collection and processing procedure or correct special problems with the data...

Chapter 3 - Collection of Data

Given the collection design, the next phase in the data acquisition process is the collection process itself. This collection process can be a one-time execution of a survey, a monthly (or other periodic) data collection, a continuous reporting of...

Chapter 4 - Processing Data

Once the collected data is in electronic form, some "processing" is usually necessary to mitigate obvious errors, and some analysis is usually necessary to convert data into useful information for decision documents, publications, and postings for...

Chapter 3 - Collection of Data

Graphic Version

Process flowchart with five shapes and six connectors.

Quadrilateral 1 flows into Rectangle 2, 3 and 4 Rectangle 2 flows into Rectangle 3 Rectangle 3 flows into Rectangle 4 Rectangle 4 flows into...

Chapter 2 - Planning Data Systems

Graphic Version

Process flowchart with four shapes and three connectors.

Parallelogram 1 flows into Rectangle 2 Rectangle 2 flows into Rectangle 3 Rectangle 3 flows into Oval 4

Chapter 2 - Planning Data Systems

Graphic Version

This is a process flowchart with eight shapes and seven connectors.

Quadrilateral 1 flows into Rectangle 2 Rectangle 2 and Parallelogram 3 flow into Rectangle 4 Rectangle 4, Parallelogram 5...