0
votes
1answer
14 views

Setting the Geometry with sql query

I am trying to merge data from a U.S. states shapefile with data on each state. I used this SQL query which is supposed to work: SELECT * FROM child_poverty_by_state UPDATE child_poverty_by_state ...
10
votes
0answers
239 views

How to query OSM for all beaches facing west? - QGIS preferred

I want to identify all beaches on this planet (or a given subset of it) that are facing westwards (+/- 20-30 degrees). My idea is to use OSM as the data source. Extracting all polygons that have the ...
0
votes
0answers
43 views

Newbie, I want to make a map that shows something along the lines of the following:

What is the average income for housing units (middle, mixed, family, etc.) within a 2 mile radius of parks for the City of Anaheim? or What is the average number of parks within the 1/2 mile radius ...
1
vote
1answer
43 views

Is it possible to extract many municipalities out of a state map at once?

Is it possible to extract many municipalities out of a state map at once? I mean not to have to do the QUERY for each and one of them? Thanks in advance.
1
vote
2answers
86 views

Reverse querying

Is it possible to run a reverse query? In other words, I have a master shapefile and a derived shapefile containing data extracted from the master file, but don't know what criteria the extraction ...
2
votes
1answer
296 views

Help building SQL query to get a list of streets of a city

From two layers in PostGIS (osm_places and osm_roads), I would need to have the roads belonging to a certain city. It would be fair enough to get the street names of all streets in a radius of X ...
2
votes
2answers
615 views

Built a query for polygon Shapefile in R

I use the package maptools to read in Shapefiles in R. I would like to know if there is a function that can built up a query/subset to select only some Polygons based on a specific attribute in the ...
0
votes
3answers
409 views

How can I query and categorize a shapefile using MS Access?

Is there a way to categorize locations by lat-long in MS Access using caparisons to shapefiles?