Como faço para simbolizar por categoria e quantidade?

Question

<\/HEAD>Eu tenho polígonos para propriedades protegidas em uma área de 5 condados. Idealmente, devido a questões de escala, eu gostaria de simbolizar esses por um único ponto no centro de cada polígono; cuja cor corresponde à categoria de propriedade (ou seja: pública, privada, municipal, etc.) e cujo tamanho corresponde à metragem (número de acres na propriedade protegida). Isso é possível? <\/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.