Choropleth Map and Diagram Map – About Merging Methods of Cartographic Presentation

Cartographic Extensions to OGC Web Map Services - Specifications for a Map and Diagram Service

Choropleth Map Accuracy: Characteristics of the Data

The accuracy of maps based on aggregate data is dependent upon (a) the extent to which aggregate values calculated for each enumeration unit are representative of the entire unit and, (b) the data classification system used to assign these values to classes. Size and compactness of these units as well as the variability of the distribution mapped are important factors in determining the accurac...

On map merging

We illustrate our experience in developing and implementing algorithms for map merging, i.e., the problem of fusing two or more partial maps without common reference frames into one large global map. The partial maps may for example be acquired by multiple robots, or during several runs of a single robot from varying starting positions. Our work deals with low quality maps based on probabilisti...

Topological Map Merging

When multiple robots cooperatively explore an environment, maps from individual robots must be merged to produce a single globally consistent map. This is a difficult problem when the robots do not have a common reference frame or global positioning. In this paper, we describe an algorithm for merging embedded topological maps. Topological maps provide a concise description of the navigability ...

Choropleth Map Design for Cancer Incidence, Part 2

Choropleth maps are commonly used in cancer reports and community discussions about cancer rates. Cancer registries increasingly use geographic information system techniques. The Centers for Disease Control and Prevention's Division of Cancer Prevention and Control convened a Map Work Group to help guide application of geographic information system mapping techniques and to promote choropleth m...