Greetings,
I am a cartography/GIS student, making a research about tools for spatial
analysis in webmaps. I use Postgis/Geoserver/Openlayers.
I have two simple questions, trying to get ideas to solve these little problems:
1- I have a html form, the user selects two layers to make an intersect
operation in postgis. This form generate a sql file. The question is: How can
I, dinamically, display the result of this sql query in openlayers?
I think I will need a new html, but how it would be constructed to display this
new layer since the user has a considerable number of possible combinations to
intersect? Does someone has a piece of code to exemplify how it can be done to
me?
2- The other spatial analysis tool that I am evaluating is the measure tool. I
am using an openlayers measure control and it´s working fine. The user can
measure a distance to answer a simple question and send the answer to me in a
html form.
My question is: How can I know if this user has used the measure tool? Just
like, when he/she activate the openlayers control, a hidden value must be added
to his/her form.
I´m starting with openlayers and it´s a great tool. Thank you a lot, best
regards from Brazil.
André Mendonça
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