def st_buffer(db,
inTbl,
bfDist,
geomCol,
outTbl,
bufferField="geometry",
whrClause=None,
dissolve=None,
cols_select=None,
outTblIsFile=None):
"""
Using Buffer on PostGIS Data
"""
from gasp.pyt import obj_to_lst
dissolve = obj_to_lst(dissolve) if dissolve != "ALL" else "ALL"
SEL_COLS = "" if not cols_select else ", ".join(obj_to_lst(cols_select))
DISS_COLS = "" if not dissolve or dissolve == "ALL" else ", ".join(
dissolve)
GRP_BY = "" if not dissolve else "{}, {}".format(SEL_COLS, DISS_COLS) if \
SEL_COLS != "" and DISS_COLS != "" else SEL_COLS \
if SEL_COLS != "" else DISS_COLS if DISS_COLS != "" else ""
Q = (
"SELECT{sel}{spFunc}{geom}, {_dist}{endFunc} AS {bf} "
"FROM {t}{whr}{grpBy}"
).format(
sel = " " if not cols_select else " {}, ".format(SEL_COLS),
spFunc="ST_Buffer(" if not dissolve else \
"ST_UnaryUnion(ST_Collect(ST_Buffer(",
geom=geomCol, _dist=bfDist,
endFunc=")" if not dissolve else ")))",
t=inTbl,
grpBy=" GROUP BY {}".format(GRP_BY) if GRP_BY != "" else "",
whr="" if not whrClause else " WHERE {}".format(whrClause),
bf=bufferField
)
if not outTblIsFile:
from gasp.sql.to import q_to_ntbl
outTbl = q_to_ntbl(db, outTbl, Q, api='psql')
else:
from gasp.gt.toshp.db import dbtbl_to_shp
dbtbl_to_shp(db,
Q,
bufferField,
outTbl,
api='pgsql2shp',
tableIsQuery=True)
return outTbl
def st_dissolve(db, table, geomColumn, outTable, whrClause=None,
diss_cols=None, outTblIsFile=None, api='sqlite'):
"""
Dissolve a Polygon table
"""
from gasp.pyt import obj_to_lst
diss_cols = obj_to_lst(diss_cols) if diss_cols else None
geomcol = "geometry" if api == 'sqlite' else 'geom'
sql = (
"SELECT{selCols} ST_UnaryUnion(ST_Collect({geom})) AS {gout} "
"FROM {tbl}{whr}{grpBy}"
).format(
selCols="" if not diss_cols else " {},".format(", ".join(diss_cols)),
geom=geomColumn, tbl=table,
whr="" if not whrClause else " WHERE {}".format(whrClause),
grpBy="" if not diss_cols else " GROUP BY {}".format(
", ".join(diss_cols)
), gout=geomcol
)
if outTblIsFile:
if api == 'sqlite':
from gasp.gt.attr import sel_by_attr
sel_by_attr(db, sql, outTable, api_gis='ogr')
elif api == 'psql':
from gasp.gt.toshp.db import dbtbl_to_shp
dbtbl_to_shp(
db, table, geomColumn, outTable, api='pgsql2shp',
tableIsQuery=True
)
else:
from gasp.sql.to import q_to_ntbl
q_to_ntbl(
db, outTable, sql, api='ogr2ogr' if api == 'sqlite' else 'psql'
)
return outTable
def break_lines_on_points(lineShp, pntShp, outShp, lnhidonpnt,
api='shply', db=None):
"""
Break lines on points location
api's available:
- shply (shapely);
- psql (postgis);
"""
if api == 'shply':
result = shply_break_lines_on_points(
lineShp, pntShp, lnhidonpnt, outShp)
elif api == 'psql':
from gasp.pyt.oss import fprop
from gasp.sql.db import create_db
from gasp.gql.to import shp_to_psql
from gasp.gt.toshp.db import dbtbl_to_shp
from gasp.gql.brk import split_lines_on_pnt
# Create DB
if not db:
db = create_db(fprop(lineShp, 'fn', forceLower=True), api='psql')
else:
from gasp.sql.i import db_exists
isDb = db_exists(db)
if not isDb:
db = create_db(db, api='psql')
# Send Data to BD
lnhTbl = shp_to_psql(db, lineShp, api="shp2pgsql")
pntTbl = shp_to_psql(db, pntShp, api="shp2pgsql")
# Get result
outTbl = split_lines_on_pnt(
db, lnhTbl, pntTbl,
fprop(outShp, 'fn', forceLower=True),
lnhidonpnt, 'gid'
)
# Export result
result = dbtbl_to_shp(
db, outTbl, "geom", outShp, inDB='psql', tableIsQuery=None,
api="pgsql2shp"
)
else:
raise ValueError(
"API {} is not available".format(api)
)
return result
def line_intersect_to_pnt(inShp, outShp, db=None):
"""
Get Points where two line features of the same feature class
intersects.
"""
from gasp.pyt.oss import fprop
from gasp.gt.toshp.db import dbtbl_to_shp
from gasp.sql.db import create_db
from gasp.gql.to import shp_to_psql
from gasp.gql.ovly import line_intersection_pnt
# Create DB if necessary
if not db:
db = create_db(fprop(inShp, 'fn', forceLower=True), api='psql')
else:
from gasp.sql.i import db_exists
isDb = db_exists(db)
if not isDb:
create_db(db, api='psql')
# Send data to DB
inTbl = shp_to_psql(db, inShp, api="shp2pgsql")
# Get result
outTbl = line_intersection_pnt(db, inTbl,
fprop(outShp, 'fn', forceLower=True))
# Export data from DB
outShp = dbtbl_to_shp(db,
outTbl,
"geom",
outShp,
inDB='psql',
tableIsQuery=None,
api="pgsql2shp")
return outShp
def dsn_data_collection_by_multibuffer(inBuffers, workspace, db, datasource,
keywords=None):
"""
Extract Digital Social Network Data for each sub-buffer in buffer.
A sub-buffer is a buffer with a radius equals to the main buffer radius /2
and with a central point at North, South, East, West, Northeast, Northwest,
Southwest and Southeast of the main buffer central point.
inBuffers = {
"lisbon" : {
'x' : -89004.994779, # in meters
'y' : -102815.866054, # in meters
'radius' : 10000,
'epsg' : 3763
},
"london : {
'x' : -14210.551441, # in meters
'y' : 6711542.47559, # in meters
'radius' : 10000,
'epsg' : 3857
}
}
or
inBuffers = {
"lisbon" : {
"path" : /path/to/file.shp,
"epsg" : 3763
}
}
keywords = ['flood', 'accident', 'fire apartment', 'graffiti', 'homeless']
datasource = 'facebook' or datasource = 'flickr'
TODO: Only works for Flickr and Facebook
"""
import os; from osgeo import ogr
from gasp.pyt import obj_to_lst
from gasp.sql.db import create_db
from gasp.sql.to import q_to_ntbl
from gasp.sql.to import df_to_db
from gasp.gql.to import shp_to_psql
from gasp.gt.toshp import df_to_shp
from gasp.gt.toshp.db import dbtbl_to_shp
from gasp.gt.prox.bf import get_sub_buffers, dic_buffer_array_to_shp
if datasource == 'flickr':
from gasp.sde.dsn.flickr import photos_location
elif datasource == 'facebook':
from gasp.sde.dsn.fb.places import places_by_query
keywords = obj_to_lst(keywords)
keywords = ["None"] if not keywords else keywords
# Create Database to Store Data
create_db(db, overwrite=True, api='psql')
for city in inBuffers:
# Get Smaller Buffers
if "path" in inBuffers[city]:
# Get X, Y and Radius
from gasp.gt.prop.feat.bf import bf_prop
__bfprop = bf_prop(
inBuffers[city]["path"], inBuffers[city]["epsg"], isFile=True
)
inBuffers[city]["x"] = __bfprop["X"]
inBuffers[city]["y"] = __bfprop["Y"]
inBuffers[city]["radius"] = __bfprop["R"]
inBuffers[city]["list_buffer"] = [{
'X' : inBuffers[city]["x"], 'Y' : inBuffers[city]["y"],
'RADIUS' : inBuffers[city]['radius'], 'cardeal' : 'major'
}] + get_sub_buffers(
inBuffers[city]["x"], inBuffers[city]["y"],
inBuffers[city]["radius"]
)
# Smaller Buffers to File
multiBuffer = os.path.join(workspace, 'buffers_{}.shp'.format(city))
dic_buffer_array_to_shp(
inBuffers[city]["list_buffer"], multiBuffer,
inBuffers[city]['epsg'], fields={'cardeal' : ogr.OFTString}
)
# Retrive data for each keyword and buffer
# Record these elements in one dataframe
c = None
tblData = None
for bf in inBuffers[city]["list_buffer"]:
for k in keywords:
if datasource == 'flickr':
tmpData = photos_location(
bf, inBuffers[city]["epsg"],
keyword=k if k != 'None' else None,
epsg_out=inBuffers[city]["epsg"],
onlySearchAreaContained=False
)
elif datasource == 'facebook':
tmpData = places_by_query(
bf, inBuffers[city]["epsg"],
keyword=k if k != 'None' else None,
epsgOut=inBuffers[city]["epsg"],
onlySearchAreaContained=False
)
if type(tmpData) == int:
print("NoData finded for buffer '{}' and keyword '{}'".format(
bf['cardeal'], k
))
continue
tmpData["keyword"] = k
tmpData["buffer_or"] = bf["cardeal"]
if not c:
tblData = tmpData
c = 1
else:
tblData = tblData.append(tmpData, ignore_index=True)
inBuffers[city]["data"] = tblData
# Get data columns names
cols = inBuffers[city]["data"].columns.values
dataColumns = [
c for c in cols if c != 'geom' and c != 'keyword' \
and c != 'buffer_or' and c != 'geometry'
]
# Send data to PostgreSQL
if 'geometry' in cols:
cgeom = 'geometry'
else:
cgeom = 'geom'
inBuffers[city]["table"] = 'tbldata_{}'.format(city)
df_to_db(
db, inBuffers[city]["data"],
inBuffers[city]["table"], api='psql',
epsg=inBuffers[city]["epsg"], geomType='POINT', colGeom=cgeom
)
# Send Buffers data to PostgreSQL
inBuffers[city]["pg_buffer"] = shp_to_psql(
db, multiBuffer, pgTable='buffers_{}'.format(city),
api="shp2pgsql", srsEpsgCode=inBuffers[city]["epsg"]
)
inBuffers[city]["filter_table"] = q_to_ntbl(
db, "filter_{}".format(inBuffers[city]["table"]), (
"SELECT srcdata.*, "
"array_agg(buffersg.cardeal ORDER BY buffersg.cardeal) "
"AS intersect_buffer FROM ("
"SELECT {cols}, keyword, geom, "
"array_agg(buffer_or ORDER BY buffer_or) AS extracted_buffer "
"FROM {pgtable} "
"GROUP BY {cols}, keyword, geom"
") AS srcdata, ("
"SELECT cardeal, geom AS bfg FROM {bftable}"
") AS buffersg "
"WHERE ST_Intersects(srcdata.geom, buffersg.bfg) IS TRUE "
"GROUP BY {cols}, keyword, geom, extracted_buffer"
).format(
cols = ", ".join(dataColumns),
pgtable = inBuffers[city]["table"],
bftable = inBuffers[city]["pg_buffer"]
), api='psql'
)
inBuffers[city]["outside_table"] = q_to_ntbl(
db, "outside_{}".format(inBuffers[city]["table"]), (
"SELECT * FROM ("
"SELECT srcdata.*, "
"array_agg(buffersg.cardeal ORDER BY buffersg.cardeal) "
"AS not_intersect_buffer FROM ("
"SELECT {cols}, keyword, geom, "
"array_agg(buffer_or ORDER BY buffer_or) AS extracted_buffer "
"FROM {pgtable} "
"GROUP BY {cols}, keyword, geom"
") AS srcdata, ("
"SELECT cardeal, geom AS bfg FROM {bftable}"
") AS buffersg "
"WHERE ST_Intersects(srcdata.geom, buffersg.bfg) IS NOT TRUE "
"GROUP BY {cols}, keyword, geom, extracted_buffer"
") AS foo WHERE array_length(not_intersect_buffer, 1) = 9"
).format(
cols = ", ".join(dataColumns),
pgtable = inBuffers[city]["table"],
bftable = inBuffers[city]["pg_buffer"]
), api='psql'
)
# Union these two tables
inBuffers[city]["table"] = q_to_ntbl(db, "data_{}".format(city), (
"SELECT * FROM {intbl} UNION ALL "
"SELECT {cols}, keyword, geom, extracted_buffer, "
"CASE WHEN array_length(not_intersect_buffer, 1) = 9 "
"THEN '{array_symbol}' ELSE not_intersect_buffer END AS "
"intersect_buffer FROM {outbl}"
).format(
intbl = inBuffers[city]["filter_table"],
outbl = inBuffers[city]["outside_table"],
cols = ", ".join(dataColumns),
array_symbol = '{' + '}'
), api='psql')
"""
Get Buffers table with info related:
-> pnt_obtidos = nr pontos obtidos usando esse buffer
-> pnt_obtidos_fora = nt pontos obtidos fora desse buffer, mas
obtidos com ele
-> pnt_intersect = nt pontos que se intersectam com o buffer
-> pnt_intersect_non_obtain = nr pontos que se intersectam mas nao
foram obtidos como buffer
"""
inBuffers[city]["pg_buffer"] = q_to_ntbl(
db, "dt_{}".format(inBuffers[city]["pg_buffer"]), (
"SELECT main.*, get_obtidos.pnt_obtidos, "
"obtidos_fora.pnt_obtidos_fora, intersecting.pnt_intersect, "
"int_not_obtained.pnt_intersect_non_obtain "
"FROM {bf_table} AS main "
"LEFT JOIN ("
"SELECT gid, cardeal, COUNT(gid) AS pnt_obtidos "
"FROM {bf_table} AS bf "
"INNER JOIN {dt_table} AS dt "
"ON bf.cardeal = ANY(dt.extracted_buffer) "
"GROUP BY gid, cardeal"
") AS get_obtidos ON main.gid = get_obtidos.gid "
"LEFT JOIN ("
"SELECT gid, cardeal, COUNT(gid) AS pnt_obtidos_fora "
"FROM {bf_table} AS bf "
"INNER JOIN {dt_table} AS dt "
"ON bf.cardeal = ANY(dt.extracted_buffer) "
"WHERE ST_Intersects(bf.geom, dt.geom) IS NOT TRUE "
"GROUP BY gid, cardeal"
") AS obtidos_fora ON main.gid = obtidos_fora.gid "
"LEFT JOIN ("
"SELECT gid, cardeal, COUNT(gid) AS pnt_intersect "
"FROM {bf_table} AS bf "
"INNER JOIN {dt_table} AS dt "
"ON bf.cardeal = ANY(dt.intersect_buffer) "
"GROUP BY gid, cardeal"
") AS intersecting ON main.gid = intersecting.gid "
"LEFT JOIN ("
"SELECT gid, cardeal, COUNT(gid) AS pnt_intersect_non_obtain "
"FROM {bf_table} AS bf "
"INNER JOIN {dt_table} AS dt "
"ON bf.cardeal = ANY(dt.intersect_buffer) "
"WHERE NOT (bf.cardeal = ANY(dt.extracted_buffer)) "
"GROUP BY gid, cardeal"
") AS int_not_obtained "
"ON main.gid = int_not_obtained.gid "
"ORDER BY main.gid"
).format(
bf_table = inBuffers[city]["pg_buffer"],
dt_table = inBuffers[city]["table"]
), api='psql'
)
"""
Get Points table with info related:
-> nobtido = n vezes um ponto foi obtido
-> obtido_e_intersect = n vezes um ponto foi obtido usando um buffer
com o qual se intersecta
-> obtido_sem_intersect = n vezes um ponto foi obtido usando um buffer
com o qual nao se intersecta
-> nintersect = n vezes que um ponto se intersecta com um buffer
-> intersect_sem_obtido = n vezes que um ponto nao foi obtido apesar
de se intersectar com o buffer
"""
inBuffers[city]["table"] = q_to_ntbl(
db, "info_{}".format(city), (
"SELECT {cols}, dt.keyword, dt.geom, "
"CAST(dt.extracted_buffer AS text) AS extracted_buffer, "
"CAST(dt.intersect_buffer AS text) AS intersect_buffer, "
"array_length(extracted_buffer, 1) AS nobtido, "
"SUM(CASE WHEN ST_Intersects(bf.geom, dt.geom) IS TRUE "
"THEN 1 ELSE 0 END) AS obtido_e_intersect, "
"(array_length(extracted_buffer, 1) - SUM("
"CASE WHEN ST_Intersects(bf.geom, dt.geom) IS TRUE "
"THEN 1 ELSE 0 END)) AS obtido_sem_intersect, "
"array_length(intersect_buffer, 1) AS nintersect, "
"(array_length(intersect_buffer, 1) - SUM("
"CASE WHEN ST_Intersects(bf.geom, dt.geom) IS TRUE "
"THEN 1 ELSE 0 END)) AS intersect_sem_obtido "
"FROM {dt_table} AS dt "
"INNER JOIN {bf_table} AS bf "
"ON bf.cardeal = ANY(dt.extracted_buffer) "
"GROUP BY {cols}, dt.keyword, dt.geom, "
"dt.extracted_buffer, dt.intersect_buffer"
).format(
dt_table = inBuffers[city]["table"],
bf_table = inBuffers[city]["pg_buffer"],
cols = ", ".join(["dt.{}".format(x) for x in dataColumns])
), api='psql'
)
# Export Results
dbtbl_to_shp(
db, inBuffers[city]["table"], 'geom',
os.path.join(workspace, "{}.shp".format(inBuffers[city]["table"])),
api='psql', epsg=inBuffers[city]["epsg"]
)
dbtbl_to_shp(
db, inBuffers[city]["pg_buffer"], 'geom',
os.path.join(workspace, "{}.shp".format(inBuffers[city]["pg_buffer"])),
api='psql', epsg=inBuffers[city]["epsg"]
)
return inBuffers
def dsnsearch_by_cell(GRID_PNT, EPSG, RADIUS, DATA_SOURCE, db, OUTPUT_TABLE):
"""
Search for data in DSN and other platforms by cell
"""
import time;
from gasp.gt.fmshp import shp_to_obj
from gasp.sql.db import create_db
from gasp.sde.dsn.fb.places import places_by_query
from gasp.g.prj import df_prj
from gasp.pyt.df.to import merge_df
from gasp.gt.toshp.db import dbtbl_to_shp
from gasp.sql.to import q_to_ntbl
from gasp.sql.to import df_to_db
# Open GRID SHP
GRID_DF = shp_to_obj(GRID_PNT)
GRID_DF = df_prj(GRID_DF, 4326) if EPSG != 4326 else GRID_DF
GRID_DF["lng"] = GRID_DF.geometry.x.astype(float)
GRID_DF["lat"] = GRID_DF.geometry.y.astype(float)
GRID_DF["grid_id"] = GRID_DF.index
# GET DATA
RESULTS = []
def get_data(row, datasrc):
if datasrc == 'facebook':
d = places_by_query(
{'x' : row.lng, 'y' : row.lat, 'r' : RADIUS}, 4326,
keyword=None, epsgOut=EPSG, _limit='100',
onlySearchAreaContained=None
)
else:
raise ValueError('{} as datasource is not a valid value'.format(datasrc))
if type(d) == int:
return
d['grid_id'] = row.grid_id
RESULTS.append(d)
time.sleep(5)
GRID_DF.apply(lambda x: get_data(x, DATA_SOURCE), axis=1)
RT = merge_df(RESULTS)
# Create DB
create_db(db, overwrite=True, api='psql')
# Send Data to PostgreSQL
df_to_db(
db, RT, "{}_data".format(DATA_SOURCE),
EPSG, "POINT",
colGeom='geometry' if 'geometry' in RT.columns.values else 'geom'
)
COLS = [
x for x in RT.columns.values if x != "geometry" and \
x != 'geom' and x != "grid_id"
] + ["geom"]
GRP_BY_TBL = q_to_ntbl(db, "{}_grpby".format(DATA_SOURCE), (
"SELECT {cols}, CAST(array_agg(grid_id) AS text) AS grid_id "
"FROM {dtsrc}_data GROUP BY {cols}"
).format(cols=", ".join(COLS), dtsrc=DATA_SOURCE), api='psql')
dbtbl_to_shp(
db, GRP_BY_TBL, "geom", OUTPUT_TABLE,
api="psql", epsg=EPSG
)
return OUTPUT_TABLE
def shps_to_shp(shps, outShp, api="ogr2ogr", fformat='.shp', dbname=None):
"""
Get all features in several Shapefiles and save them in one file
api options:
* ogr2ogr;
* psql;
* pandas;
* psql;
"""
import os
if type(shps) != list:
# Check if is dir
if os.path.isdir(shps):
from gasp.pyt.oss import lst_ff
# List shps in dir
shps = lst_ff(shps, file_format=fformat)
else:
raise ValueError((
'shps should be a list with paths for Feature Classes or a path to '
'folder with Feature Classes'))
if api == "ogr2ogr":
from gasp import exec_cmd
from gasp.gt.prop.ff import drv_name
out_drv = drv_name(outShp)
# Create output and copy some features of one layer (first in shps)
cmdout = exec_cmd('ogr2ogr -f "{}" {} {}'.format(
out_drv, outShp, shps[0]))
# Append remaining layers
lcmd = [
exec_cmd('ogr2ogr -f "{}" -update -append {} {}'.format(
out_drv, outShp, shps[i])) for i in range(1, len(shps))
]
elif api == 'pandas':
"""
Merge SHP using pandas
"""
from gasp.gt.fmshp import shp_to_obj
from gasp.gt.toshp import df_to_shp
if type(shps) != list:
raise ValueError(
'shps should be a list with paths for Feature Classes')
dfs = [shp_to_obj(shp) for shp in shps]
result = dfs[0]
for df in dfs[1:]:
result = result.append(df, ignore_index=True, sort=True)
df_to_shp(result, outShp)
elif api == 'psql':
import os
from gasp.sql.tbl import tbls_to_tbl, del_tables
from gasp.gql.to import shp_to_psql
if not dbname:
from gasp.sql.db import create_db
create_db(dbname, api='psql')
pg_tbls = shp_to_psql(dbname, shps, api="shp2pgsql")
if os.path.isfile(outShp):
from gasp.pyt.oss import fprop
outbl = fprop(outShp, 'fn')
else:
outbl = outShp
tbls_to_tbl(dbname, pg_tbls, outbl)
if outbl != outShp:
from gasp.gt.toshp.db import dbtbl_to_shp
dbtbl_to_shp(dbname,
outbl,
'geom',
outShp,
inDB='psql',
api="pgsql2shp")
del_tables(dbname, pg_tbls)
elif api == 'grass':
from gasp import exec_cmd
rcmd = exec_cmd(
("v.patch input={} output={} --overwrite --quiet").format(
",".join(shps), outShp))
else:
raise ValueError("{} API is not available")
return outShp
def proj(inShp, outShp, outEPSG, inEPSG=None,
gisApi='ogr', sql=None, db_name=None):
"""
Project Geodata using GIS
API's Available:
* ogr;
* ogr2ogr;
* pandas;
* ogr2ogr_SQLITE;
* psql;
"""
import os
if gisApi == 'ogr':
"""
Using ogr Python API
"""
if not inEPSG:
raise ValueError(
'To use ogr API, you should specify the EPSG Code of the'
' input data using inEPSG parameter'
)
from osgeo import ogr
from gasp.g.lyr.fld import copy_flds
from gasp.gt.prop.feat import get_gtype
from gasp.gt.prop.ff import drv_name
from gasp.gt.prop.prj import get_sref_from_epsg, get_trans_param
from gasp.pyt.oss import fprop
def copyShp(out, outDefn, lyr_in, trans):
for f in lyr_in:
g = f.GetGeometryRef()
g.Transform(trans)
new = ogr.Feature(outDefn)
new.SetGeometry(g)
for i in range(0, outDefn.GetFieldCount()):
new.SetField(outDefn.GetFieldDefn(i).GetNameRef(), f.GetField(i))
out.CreateFeature(new)
new.Destroy()
f.Destroy()
# ####### #
# Project #
# ####### #
transP = get_trans_param(inEPSG, outEPSG)
inData = ogr.GetDriverByName(
drv_name(inShp)).Open(inShp, 0)
inLyr = inData.GetLayer()
out = ogr.GetDriverByName(
drv_name(outShp)).CreateDataSource(outShp)
outlyr = out.CreateLayer(
fprop(outShp, 'fn'), get_sref_from_epsg(outEPSG),
geom_type=get_gtype(
inShp, name=None, py_cls=True, gisApi='ogr'
)
)
# Copy fields to the output
copy_flds(inLyr, outlyr)
# Copy/transform features from the input to the output
outlyrDefn = outlyr.GetLayerDefn()
copyShp(outlyr, outlyrDefn, inLyr, transP)
inData.Destroy()
out.Destroy()
elif gisApi == 'ogr2ogr':
"""
Transform SRS of any OGR Compilant Data. Save the transformed data
in a new file
"""
if not inEPSG:
from gasp.gt.prop.prj import get_epsg_shp
inEPSG = get_epsg_shp(inShp)
if not inEPSG:
raise ValueError('To use ogr2ogr, you must specify inEPSG')
from gasp import exec_cmd
from gasp.gt.prop.ff import drv_name
cmd = (
'ogr2ogr -f "{}" {} {}{} -s_srs EPSG:{} -t_srs EPSG:{}'
).format(
drv_name(outShp), outShp, inShp,
'' if not sql else ' -dialect sqlite -sql "{}"'.format(sql),
str(inEPSG), str(outEPSG)
)
outcmd = exec_cmd(cmd)
elif gisApi == 'ogr2ogr_SQLITE':
"""
Transform SRS of a SQLITE DB table. Save the transformed data in a
new table
"""
from gasp import exec_cmd
if not inEPSG:
raise ValueError((
'With ogr2ogr_SQLITE, the definition of inEPSG is '
'demandatory.'
))
# TODO: Verify if database is sqlite
db, tbl = inShp['DB'], inShp['TABLE']
sql = 'SELECT * FROM {}'.format(tbl) if not sql else sql
outcmd = exec_cmd((
'ogr2ogr -update -append -f "SQLite" {db} -nln "{nt}" '
'-dialect sqlite -sql "{_sql}" -s_srs EPSG:{inepsg} '
'-t_srs EPSG:{outepsg} {db}'
).format(
db=db, nt=outShp, _sql=sql, inepsg=str(inEPSG),
outepsg=str(outEPSG)
))
elif gisApi == 'pandas':
# Test if input Shp is GeoDataframe
from gasp.gt.fmshp import shp_to_obj
from gasp.gt.toshp import df_to_shp
df = shp_to_obj(inShp)
# Project df
newDf = df.to_crs({'init' : 'epsg:{}'.format(str(outEPSG))})
# Save as file
return df_to_shp(df, outShp)
elif gisApi == 'psql':
from gasp.sql.db import create_db
from gasp.pyt.oss import fprop
from gasp.gql.to import shp_to_psql
from gasp.gt.toshp.db import dbtbl_to_shp
from gasp.gql.prj import sql_proj
# Create Database
if not db_name:
db_name = create_db(fprop(
outShp, 'fn', forceLower=True), api='psql'
)
else:
from gasp.sql.i import db_exists
isDb = db_exists(db_name)
if not isDb:
create_db(db_name, api='psql')
# Import Data
inTbl = shp_to_psql(db_name, inShp, api='shp2pgsql', encoding="LATIN1")
# Transform
oTbl = sql_proj(
db_name, inTbl, fprop(outShp, 'fn', forceLower=True),
outEPSG, geomCol='geom', newGeom='geom'
)
# Export
outShp = dbtbl_to_shp(
db_name, oTbl, 'geom', outShp, api='psql', epsg=outEPSG
)
else:
raise ValueError('Sorry, API {} is not available'.format(gisApi))
return outShp
def lnh_to_polygons(inShp, outShp, api='saga', db=None):
"""
Line to Polygons
API's Available:
* saga;
* grass;
* pygrass;
* psql;
"""
if api == 'saga':
"""
http://www.saga-gis.org/saga_tool_doc/7.0.0/shapes_polygons_3.html
Converts lines to polygons. Line arcs are closed to polygons simply
by connecting the last point with the first. Optionally parts of
polylines can be merged into one polygon optionally.
"""
from gasp import exec_cmd
rcmd = exec_cmd(("saga_cmd shapes_polygons 3 -POLYGONS {} "
"LINES {} -SINGLE 1 -MERGE 1").format(outShp, inShp))
elif api == 'grass' or api == 'pygrass':
# Do it using GRASS GIS
import os
from gasp.gt.wenv.grs import run_grass
from gasp.pyt.oss import fprop
# Create GRASS GIS Session
wk = os.path.dirname(outShp)
lo = fprop(outShp, 'fn', forceLower=True)
gs = run_grass(wk, lo, srs=inShp)
import grass.script as grass
import grass.script.setup as gsetup
gsetup.init(gs, wk, lo, 'PERMANENT')
# Import Packages
from gasp.gt.toshp.cff import shp_to_grs, grs_to_shp
from gasp.gt.toshp.cgeo import line_to_polyline
from gasp.gt.toshp.cgeo import geomtype_to_geomtype
from gasp.gt.toshp.cgeo import boundary_to_areas
# Send data to GRASS GIS
lnh_shp = shp_to_grs(inShp,
fprop(inShp, 'fn', forceLower=True),
asCMD=True if api == 'grass' else None)
# Build Polylines
pol_lnh = line_to_polyline(lnh_shp,
"polylines",
asCmd=True if api == 'grass' else None)
# Polyline to boundary
bound = geomtype_to_geomtype(pol_lnh,
'bound_shp',
'line',
'boundary',
cmd=True if api == 'grass' else None)
# Boundary to Area
areas_shp = boundary_to_areas(bound,
lo,
useCMD=True if api == 'grass' else None)
# Export data
outShp = grs_to_shp(areas_shp,
outShp,
'area',
asCMD=True if api == 'grass' else None)
elif api == 'psql':
""" Do it using PostGIS """
from gasp.pyt.oss import fprop
from gasp.sql.db import create_db
from gasp.gql.to import shp_to_psql
from gasp.gt.toshp.db import dbtbl_to_shp
from gasp.gql.cnv import lnh_to_polg
from gasp.gt.prop.prj import get_epsg_shp
# Create DB
if not db:
db = create_db(fprop(inShp, 'fn', forceLower=True), api='psql')
else:
from gasp.sql.i import db_exists
isDB = db_exists(db)
if not isDB:
create_db(db, api='psql')
# Send data to DB
in_tbl = shp_to_psql(db, inShp, api="shp2pgsql")
# Get Result
result = lnh_to_polg(db, in_tbl, fprop(outShp, 'fn', forceLower=True))
# Export Result
outshp = dbtbl_to_shp(db,
result,
"geom",
outShp,
api='psql',
epsg=get_epsg_shp(inShp))
else:
raise ValueError("API {} is not available".format(api))
return outShp
def grs_vec_roads(osmdb, lineTbl, polyTbl):
"""
Select Roads for GRASS GIS
"""
import datetime
from gasp.sql.i import row_num
from gasp.gt.toshp.db import dbtbl_to_shp
from gasp.gt.prox.bf import _buffer
from gasp.gt.gop.genze import dissolve
from gasp.gt.tbl.grs import add_table
# Roads to GRASS GIS
time_a = datetime.datetime.now().replace(microsecond=0)
NR = row_num(osmdb, lineTbl, where="roads IS NOT NULL", api='sqlite')
time_b = datetime.datetime.now().replace(microsecond=0)
if not NR: return None, {0 : ('count_rows_roads', time_b - time_a)}
roadsVect = dbtbl_to_shp(
osmdb, lineTbl, "geometry", "all_roads", where="roads IS NOT NULL",
inDB='sqlite', outShpIsGRASS=True
)
time_c = datetime.datetime.now().replace(microsecond=0)
# Buildings to GRASS GIS
NB = row_num(osmdb, polyTbl, where="building IS NOT NULL", api='sqlite')
time_d = datetime.datetime.now().replace(microsecond=0)
if NB:
from gasp.gt.prox import grs_near as near
from gasp.gt.tbl.grs import update_table
builds = dbtbl_to_shp(
osmdb, polyTbl, "geometry", "all_builds", where="building IS NOT NULL",
filterByReg=True, inDB='sqlite', outShpIsGRASS=True
)
time_e = datetime.datetime.now().replace(microsecond=0)
near(roadsVect, builds, nearDistCol="todist", maxDist=12, as_cmd=True)
time_f = datetime.datetime.now().replace(microsecond=0)
update_table(
roadsVect, "bf_roads", "round(todist,0)",
"\"todist > 0\"",
lyrN=1, ascmd=True
)
time_g = datetime.datetime.now().replace(microsecond=0)
else:
time_e = None; time_f = None; time_g = None
# Run Buffer tool
roadsBf = _buffer(
roadsVect, "bf_roads", "bf_roads",
api='grass', geom_type="line"
)
time_h = datetime.datetime.now().replace(microsecond=0)
# Dissolve Roads
roadsDiss = dissolve(roadsBf, "diss_roads", "roads", api="grass")
add_table(roadsDiss, None, lyrN=1, asCMD=True)
time_i = datetime.datetime.now().replace(microsecond=0)
return roadsDiss, {
0 : ('count_rows_roads', time_b - time_a),
1 : ('import_roads', time_c - time_b),
2 : ('count_rows_build', time_d - time_c),
3 : None if not time_e else ('import_builds', time_e - time_d),
4 : None if not time_f else ('near_analysis', time_f - time_e),
5 : None if not time_g else ('update_buffer_tbl', time_g - time_f),
6 : ('buffer_roads', time_h - time_g if time_g else time_h - time_d),
7 : ('diss_roads', time_i - time_h)
}
def grs_rst_roads(osmdb, lineTbl, polyTbl, dataFolder, LULC_CLS):
"""
Raster Roads for GRASS
"""
import os; import datetime
from gasp.gt.toshp.cff import shp_to_grs
from gasp.gt.toshp.db import dbtbl_to_shp
from gasp.gt.torst import shp_to_rst
from gasp.gql.prox import splite_buffer
from gasp.sql.i import row_num
time_a = datetime.datetime.now().replace(microsecond=0)
NR = row_num(osmdb, lineTbl, where="roads IS NOT NULL", api='sqlite')
time_b = datetime.datetime.now().replace(microsecond=0)
if not NR: return None, {0 : ('count_rows_roads', time_b - time_a)}
roadFile = splite_buffer(
osmdb, lineTbl, "bf_roads", "geometry", 'bfu_roads',
#os.path.join(dataFolder, 'bf_roads.gml'),
whrClause="roads IS NOT NULL",
outTblIsFile=None, dissolve="ALL"
)
time_c = datetime.datetime.now().replace(microsecond=0)
#roadGrs = shp_to_grs(roadFile, "bf_roads", filterByReg=True, asCMD=True)
roadGrs = dbtbl_to_shp(
osmdb, roadFile, "geom", 'bf_roads',
notTable=True, outShpIsGRASS=True, inDB='sqlite'
)
time_d = datetime.datetime.now().replace(microsecond=0)
roadRst = shp_to_rst(
roadGrs, int(LULC_CLS), None, None, "rst_roads", api="grass"
)
time_e = datetime.datetime.now().replace(microsecond=0)
# Builds to GRASS and to RASTER
NB = row_num(osmdb, polyTbl, where="building IS NOT NULL", api='sqlite')
time_f = datetime.datetime.now().replace(microsecond=0)
if NB:
from gasp.gt.nop.alg import rstcalc
from gasp.gt.nop.rcls import set_null, null_to_value
buildsShp = dbtbl_to_shp(
osmdb, polyTbl, "geom", "all_builds",
where="building IS NOT NULL",
notTable=True, outShpIsGRASS=True, inDB='sqlite'
)
time_g = datetime.datetime.now().replace(microsecond=0)
buildsRst = shp_to_rst(
buildsShp, 1, None, None, "rst_builds", api="grass"
)
time_h = datetime.datetime.now().replace(microsecond=0)
# Buildings to nodata | Nodata to 0
null_to_value(buildsRst, 0, as_cmd=True)
time_i = datetime.datetime.now().replace(microsecond=0)
set_null(buildsRst, 1, ascmd=True)
time_j = datetime.datetime.now().replace(microsecond=0)
# Do the math: roads + builds | if builds and roads at the same cell
# cell will be null in the road layer
roadsRes = rstcalc(
"{} + {}".format(roadRst, buildsRst), "cls_roads", api="grass")
time_l = datetime.datetime.now().replace(microsecond=0)
return {LULC_CLS : roadsRes}, {
0 : ('count_rows_roads', time_b - time_a),
1 : ('buffer_roads', time_c - time_b),
2 : ('import_roads', time_d - time_c),
3 : ('roads_to_rst', time_e - time_d),
4 : ('count_build', time_f - time_e),
5 : ('builds_to_grs', time_g - time_f),
6 : ('builds_to_rst', time_h - time_g),
7 : ('bnull_to_val', time_i - time_h),
8 : ('builds_to_nd', time_j - time_i),
9 : ('roads_build_mc', time_l - time_j)
}
else:
return {LULC_CLS : roadRst}, {
0 : ('count_rows_roads', time_b - time_a),
1 : ('buffer_roads', time_c - time_b),
2 : ('import_roads', time_d - time_c),
3 : ('roads_to_rst', time_e - time_d),
4 : ('count_build', time_f - time_e)
}
def v_break_at_points(workspace, loc, lineShp, pntShp, db, srs, out_correct,
out_tocorrect):
"""
Break lines at points - Based on GRASS GIS v.edit
Use PostGIS to sanitize the result
TODO: Confirm utility
Problem: GRASS GIS always uses the first line to break.
"""
import os
from gasp.gql.to import shp_to_psql
from gasp.gt.toshp.db import dbtbl_to_shp
from gasp.gt.wenv.grs import run_grass
from gasp.pyt.oss import fprop
from gasp.sql.db import create_db
from gasp.sql.to import q_to_ntbl
tmpFiles = os.path.join(workspace, loc)
gbase = run_grass(workspace, location=loc, srs=srs)
import grass.script as grass
import grass.script.setup as gsetup
gsetup.init(gbase, workspace, loc, 'PERMANENT')
from gasp.gt.toshp.cff import shp_to_grs, grs_to_shp
grsLine = shp_to_grs(
lineShp, fprop(lineShp, 'fn', forceLower=True)
)
vedit_break(grsLine, pntShp, geomType='line')
LINES = grs_to_shp(grsLine, os.path.join(
tmpFiles, grsLine + '_v1.shp'), 'line')
# Sanitize output of v.edit.break using PostGIS
create_db(db, overwrite=True, api='psql')
LINES_TABLE = shp_to_psql(
db, LINES, srsEpsgCode=srs,
pgTable=fprop(LINES, 'fn', forceLower=True), api="shp2pgsql"
)
# Delete old/original lines and stay only with the breaked one
Q = (
"SELECT {t}.*, foo.cat_count FROM {t} INNER JOIN ("
"SELECT cat, COUNT(cat) AS cat_count, "
"MAX(ST_Length(geom)) AS max_len "
"FROM {t} GROUP BY cat"
") AS foo ON {t}.cat = foo.cat "
"WHERE foo.cat_count = 1 OR foo.cat_count = 2 OR ("
"foo.cat_count = 3 AND ST_Length({t}.geom) <= foo.max_len)"
).format(t=LINES_TABLE)
CORR_LINES = q_to_ntbl(
db, "{}_corrected".format(LINES_TABLE), Q, api='psql'
)
# TODO: Delete Rows that have exactly the same geometry
# Highlight problems that the user must solve case by case
Q = (
"SELECT {t}.*, foo.cat_count FROM {t} INNER JOIN ("
"SELECT cat, COUNT(cat) AS cat_count FROM {t} GROUP BY cat"
") AS foo ON {t}.cat = foo.cat "
"WHERE foo.cat_count > 3"
).format(t=LINES_TABLE)
ERROR_LINES = q_to_ntbl(
db, "{}_not_corr".format(LINES_TABLE), Q, api='psql'
)
dbtbl_to_shp(
db, CORR_LINES, "geom", out_correct,
api="pgsql2shp"
)
dbtbl_to_shp(
db, ERROR_LINES, "geom", out_tocorrect,
api="pgsql2shp"
)
