<div class="gmail_quote">Hi, list!<br>I am planning to make a web application which supports data extraction and thematic mapping based on users' selection of what topic they want. <br>Currently, I am preparing database.<br>
My problem is that I have quite a large of census items for four types of administrative units. <br>
Original source data are not structured in general gis data table, meaning there is a large table that consists of three columns of variable id, location id, value. <br>A typical database for web mapping is not usually in this structure. So, at first I tried to pivot the large data table by variable id. <br>
However currently, I have about 800, 800, 660, and 100 variables for each type of administrative units. <br>Also, data tables after pivoting will have a large number of columns. <br>I am between two thoughts:<br>1) since my database will not be updated frequently, let's do pivoting, and manage several tables with about 250 columns. <br>
2) just keep the original structure for flexibility. <br>Which way do you is better? Any opinions are welcome. <br><br>from Myunghwa Hwang<br clear="all"><font color="#888888"><br>-- <br>Myunghwa Hwang <br>GeoDa Center<br>
School of Geographical Sciences<br>
Arizona State University<br><a href="mailto:mhwang4@gmail.com" target="_blank">mhwang4@gmail.com</a> or <a href="mailto:Myunghwa.Hwang@asu.edu" target="_blank">Myunghwa.Hwang@asu.edu</a><br>
</font></div><br><br clear="all"><br>-- <br>Myunghwa Hwang <br>GeoDa Center<br>School of Geographical Sciences<br>Arizona State University<br><a href="mailto:mhwang4@gmail.com">mhwang4@gmail.com</a> or <a href="mailto:Myunghwa.Hwang@asu.edu">Myunghwa.Hwang@asu.edu</a><br>