A continuación se presenta diagrama con las categorías propuestas para la clasificación de los terrenos. Sus comentarios nos permitirán optimizar las categorías.
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Classification Scheme
15 Jan
Posted by Víctor Cuadrado in
Diagramas | 5 comments
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
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Dear Colleagues,
A group of us met recently to go over the land use data/images and classifications to develop a proposal for the rest of the group. The documents attached are what they have developed so far and now need your input so that we can have a set of classification standards that the group as a whole uses and have consistency with the GIS data.
Please email Victor with any specific questions, otherwise send your comments to the group by “reply all” so we can have a conversation. We will discuss any modifications at our next research meeting on January 17 and 18th.
Thank you,
Tischa
Thanks for sending this, Tischa. I really like the SJ ULTRA proposed scheme, but since many of the historical classifications we will use to assess change over time (the ones that Olga compiled for us) are not as detailed as this one, I am wondering what the intent of this scheme is. Will it be used for some new classification? I hope someone can fill in my knowledge gap here. Thank you in advance!
Sincerely,
Myrna
Hola: Gracias por esta informacion! Tengo algunas sugerencias/commentarios:
1. En la parte urbana me parecio que en algu momento se habia dicho que el FS ya habia hecho una clasificacion de green y grey areas de San Juan. Hay un shapefile disponible? Cual es la estructura de la clasifcacion (i.e. cuales son las categorias)?
2. Relacionado a lo anterior, veo que en el esquema de clasificacion la parte built-up (subclasificacion residencial) tiene clasificaciones como high y low density, me parecen muy pocas categorias para esta variable sobre todo cuando habiamos determinado que el RPES tenia al menos tres estratas de (low,middle, high) de intensidad de ambiente contruido .
3. En una reunion del grupo H1B en Marzo 2010 Daniel Davila presento diferentes capas de informacion que estan disponible pero no me queda claro si estarian disponible en el repositorio (flooding zones, suelos). Imagino que tambien hay informacion sobre los tipos de bosque disponible. Este tipo de informacion podria ser importante a la hora de explicar patrones de diversidad urbana. En general capas de informacion a escalas menores a las presentadas seria bien importante para las personas trabajando dentro del grupo intensivo. Una gran contribucion de ULTRA seria un repositorio de esta informacion.
4. Si el utlimo mapa topografico de San Juan disponible es el de 1982 entonces habria que tratar de generar uno nuevo por que imagino que la topografia de San Juan ha cambiado muchisimo.
Nuevamente gracias por la informacion, Elvia
1. My main concern has to do with the built-up land. How will you account for mixed land uses? For instance, you have commercial uses on the first floor of a building and residential uses on the upper floors, etc. One option is to classify according to dominant use, but if there were a more precise way to define multiple uses, that would be better. Mixed uses are quite prevalent.
Luis
Dear Luis,
Is there tax parcel data for San Juan? It is often more useful for getting this kind of “use” information than are satellite-derived classifications of land cover (residential high and low density). Even the latter classification based on an assumption that we can separate residential from commercial use based on electro-magnetic response is really impossible. Ancillary data is sometimes used to assist in this but is painfully time consuming. That’s why it is really more accurate to call these classifications land cover maps only. Tax parcel maps don’t tell you which part of a property, particularly large ones, are dedicated to which type of activity, but at least will tell you if the property includes mixed uses such as commercial/residential, or pasture/forestry.
Myrna