カテゴリと数量でどのようにシンボル化しますか？

Question

<\/HEAD>5つの郡の地域にある保護された物件のポリゴンがあります。理想的には、スケールの問題から、これらを各ポリゴンの中心にある単一のポイントでシンボル化したいと考えています。そのポイントの色は所有権のカテゴリ（例：public、private、municipalなど）に対応し、サイズは保護された物件の面積（エーカー数）に対応します。これは可能ですか？ <\/P><\/BODY><\/HTML>

DanPatterson_Retired · Answer

If you want to standardize across regions for example, I prefer to use a manual classification scheme, rather than on that is calculated from the statistical or distribution parameters (ie std dev, natural breaks, quantiles etc).  Also look at your ranges, 0-65 then 65-172 etc etc.  the sizes of the symbols is one thing, whether the increments makes sense to the observer is totally separate issue.

LindsayKeeney · Answer

Thank you. That worked great for when the ownership categories are in different layers.

In an effort to try to standardize the acreage classification across the categories, I merged the layers. Is there a way to symbolize from one layer by both ownership category (color) and acreage (point size). When I try to use quantity by category in the merged layer it places graduated symbolized points by acreage in the center of polygons colored to symbolize the categories.

Is there a simpler way to do this? Should I just manually classify the acreage so its the same across each category?

Thanks for the help.

DarrenWiens2 · Answer

I think you're looking for the Multiple Attributes option. Value Field = ownership category, Variation by Symbol Size = acreage.