def index(request):
"""
index(request)
Site Front Page.
Presents introductory text and a map of NCA regions. A form
allows selection of a region. On submit, user is redirected
to the rgn_smry view at the selected region.
"""
# smrylogger.debug("INDEX VIEW")
# Initialize a session.
site_attr.init_session(request)
attr_dct = site_attr.set_attrs(request, "modis_lnd_cvr")
smrylogger.debug("index( )|attr_dct: %s", attr_dct)
# Region selection form.
if request.method == "POST":
rgn_form = RegionForm(request.POST)
if rgn_form.is_valid():
# Update attributes.
for key in rgn_form.cleaned_data.keys():
attr_dct[key] = rgn_form.cleaned_data[key]
# smrylogger.debug("index( )|attr_dct: %s", attr_dct)
# Set session attributes to dictionary items.
site_attr.set_session_attr(request, attr_dct)
# Create response to redirect to region summary.
response = HttpResponseRedirect("rgn_smry/")
else:
# Create an instance of class RegionForm.
rgn_form = RegionForm(
initial={"region": abbrv_to_rgn[attr_dct["region"]], "dscrpt_txt": (attr_dct["dscrpt_txt"] == "True")}
)
# Get introductory text from the database and process to html.
intro_text = text_items.get_txt_html("index", "intro_text")
intro_text_1 = text_items.get_txt_html("index", "intro_text_1", replace={"<p>": "", "</p>": "<br /><br />"})
# Load the region summary template.
index_template = loader.get_template("smry/index.html")
context = RequestContext(
request,
{"form": rgn_form, "form_help": rgn_form.form_help, "intro_text": intro_text, "intro_text_1": intro_text_1},
)
response = HttpResponse(index_template.render(context))
return response
def nlcd(request):
"""
nlcd(request)
National Land Cover Database (NLCD)
"""
smrylogger.debug("NLCD VIEW")
# Set attributes.
attr_dct = site_attr.set_attrs(request, "nlcd")
# Form with current year.
year_form = YearForm_NLCD(
request.POST,
initial={
"year": attr_dct["year"],
"opacity": attr_dct["opacity"],
"dscrpt_txt": attr_dct["dscrpt_txt"],
"lrg_fmt": attr_dct["lrg_fmt"],
},
)
# 1
smrylogger.debug("1 nlcd( )|year_form.initial: %s", year_form.initial)
if request.method == "POST":
# Create an instance of class YearForm and populate with
# request data.
year_form = YearForm_NLCD(request.POST)
if year_form.is_valid():
# Update attributes.
for key in year_form.cleaned_data.keys():
attr_dct[key] = year_form.cleaned_data[key]
# Set attributes in session to dictionary items.
site_attr.set_session_attr(request, attr_dct)
# 2
smrylogger.debug("2 nlcd( )|attr_dct: %s", attr_dct)
else:
# 3
smrylogger.warning("nlcd( )|Warning: year_form is invalid")
else:
# Create an instance of class RegionForm.
year_form = YearForm_NLCD(
initial={
"year": attr_dct["year"],
"opacity": attr_dct["opacity"],
"dscrpt_txt": attr_dct["dscrpt_txt"],
"lrg_fmt": attr_dct["lrg_fmt"],
}
)
# Initialize Earth Engine. The configuration file config.py
# contains credentials.
ee.Initialize(config.EE_CREDENTIALS, config.EE_URL)
# Get color palette.
palette_str = palettes.nlcd_palette()
# Derive the image name.
img_name = "USGS/NLCD/NLCD" + str(attr_dct["year"])
# 4
smrylogger.debug("4 nlcd( )|img_name: %s", img_name)
# Get map ID.
img = ee.Image(img_name).select(["landcover"])
mapid = img.getMapId({"min": 0, "max": 255, "palette": palette_str})
# 5
smrylogger.debug("5 nlcd( )|mapid: %s", mapid)
# Get ecoregions map ID.
mapid_eco_rgns = ee_smry.ee_create_ecorgns_map()
# 6
smrylogger.debug("6 nlcd( )|mapid_eco_rgns: %s", mapid_eco_rgns)
# Create request context from attributes.
# Mapid and token for base map.
dct = {"mapid": mapid["mapid"], "token": mapid["token"]}
# Mapid and token for ecoregions FeatureCollection.
dct["mapid_eco_rgns"] = mapid_eco_rgns["mapid"]
dct["token_eco_rgns"] = mapid_eco_rgns["token"]
for key in attr_dct.keys():
dct[key] = attr_dct[key]
# Set image size.
(dct["width"], dct["height"]) = img_size(lrg_fmt=dct["lrg_fmt"])
# Set opacity attribute.
dct["opacity"] = 0.01 * float(dct["opacity"])
dct["heading"] = "U.S. National Land Cover Database"
dct["form"] = year_form
dct["form_action"] = "smry/nlcd/"
dct["form_help"] = year_form.form_help
# 7
smrylogger.debug("cdl( )|dct: %s", dct)
# Load the ee map template.
template = loader.get_template("land_cover/ee_map.html")
# Create context and render.
context = RequestContext(request, dct)
response = HttpResponse(template.render(context))
return response
def land_cover(request):
"""
land_cover(request)
Global maps of the MODIS land cover data product (MCD12Q), rendered by the
Google Earth Engine.
"""
smrylogger.debug("LAND COVER VIEW")
# Set attributes.
attr_dct = site_attr.set_attrs(request, "modis_lnd_cvr")
# 1
smrylogger.debug("1 land_cover( )|attr_dct: %s", attr_dct)
# Create an instance of YearForm_MODIS_LandCover.
year_form = YearForm_MODIS_LandCover(
request.POST,
initial={
"year": attr_dct["year"],
"opacity": attr_dct["opacity"],
"dscrpt_txt": attr_dct["dscrpt_txt"],
"lrg_fmt": attr_dct["lrg_fmt"],
},
)
# 2
smrylogger.debug("2 land_cover( )|year_form.initial: %s", year_form.initial)
if request.method == "POST":
# Create an instance of class YearForm and populate with
# request data.
year_form = YearForm_MODIS_LandCover(request.POST)
if year_form.is_valid():
# Update attributes.
for key in year_form.cleaned_data.keys():
attr_dct[key] = year_form.cleaned_data[key]
# Set attributes in session to dictionary items.
site_attr.set_session_attr(request, attr_dct)
# 3
smrylogger.debug("3 land_cover( )|attr_dct: %s", attr_dct)
else:
# 4
logmsg = "4 land_cover( )|Warning: year_form is invalid"
smrylogger.debug(logmsg)
else:
# Create an instance of class YearForm.
year_form = YearForm_MODIS_LandCover(
initial={
"year": attr_dct["year"],
"opacity": attr_dct["opacity"],
"dscrpt_txt": attr_dct["dscrpt_txt"],
"lrg_fmt": attr_dct["lrg_fmt"],
}
)
# Initialize Earth Engine. The configuration file config.py
# contains credentials.
ee.Initialize(config.EE_CREDENTIALS, config.EE_URL)
# Get color palette.
palette_str = palettes.igbp_lndcvr()
# Create Image name.
img_name = "MODIS/051/MCD12Q1/" + str(attr_dct["year"]) + "_01_01"
# 5
smrylogger.debug("5 land_cover( )|img_name: %s", img_name)
# Get map ID.
img = ee.Image(img_name).select(["Land_Cover_Type_1"])
mapid = img.getMapId({"min": 0, "max": 17, "palette": palette_str})
# 6
smrylogger.debug("6 land_cover( )|mapid: %s", mapid)
# Get ecoregions map ID.
mapid_eco_rgns = ee_smry.ee_create_ecorgns_map()
# 7
smrylogger.debug("7 land_cover( )|mapid_eco_rgns: %s", mapid_eco_rgns)
# Create request context from attributes.
# Mapid and token for base map.
dct = {"mapid": mapid["mapid"], "token": mapid["token"]}
# Mapid and token for ecoregions FeatureCollection.
dct["mapid_eco_rgns"] = mapid_eco_rgns["mapid"]
dct["token_eco_rgns"] = mapid_eco_rgns["token"]
for key in attr_dct.keys():
dct[key] = attr_dct[key]
# Set image size.
(dct["width"], dct["height"]) = img_size(lrg_fmt=dct["lrg_fmt"])
# Set opacity attribute.
dct["opacity"] = 0.01 * float(dct["opacity"])
dct["heading"] = "Global MODIS Land Cover"
dct["form"] = year_form
dct["form_action"] = "smry/land_cover/"
dct["form_help"] = year_form.form_help
# 8
smrylogger.debug("8 land_cover( )|dct: %s", dct)
# Load the ee map template.
template = loader.get_template("land_cover/ee_map.html")
# Create context and render.
context = RequestContext(request, dct)
response = HttpResponse(template.render(context))
return response
def rgn_smry(request):
"""
rgn_smry(request)
Regional summary view.
"""
smrylogger.debug("REGIONAL SUMMARY VIEW")
# Set attributes.
attr_dct = site_attr.set_attrs(request, "modis_lnd_cvr")
# Create an instance of class Region_Region_Form.
rgn_form = RegionYearForm_MODIS_LandCover(
initial={"region": attr_dct["region"], "year": attr_dct["year"], "dscrpt_txt": attr_dct["dscrpt_txt"]}
)
if request.method == "POST":
# Create an instance of class RegionYearForm and populate
# with request data.
rgn_form = RegionYearForm_MODIS_LandCover(request.POST)
if rgn_form.is_valid():
# Update attributes.
for key in rgn_form.cleaned_data.keys():
attr_dct[key] = rgn_form.cleaned_data[key]
# 1
smrylogger.debug("1 rgn_smry( )|attr_dct: %s", attr_dct)
# Set attributes in session to dictionary items.
site_attr.set_session_attr(request, attr_dct)
# 2
smrylogger.debug("2 rgn_smry( )|attr_dct: %s", attr_dct)
else:
# 3
smrylogger.debug("3 rgn_smry( )|Warning: rgn_form is invalid")
else:
# Create an instance of class RegionForm.
rgn_form = RegionYearForm_MODIS_LandCover(
initial={"region": attr_dct["region"], "year": attr_dct["year"], "dscrpt_txt": attr_dct["dscrpt_txt"]}
)
if attr_dct["dscrpt_txt"]:
# Get descriptive text from the database.
intro_txt_html = text_items.get_txt_html("rgn_smry", "rgn_smry_intro")
trends_txt_html = text_items.get_txt_html("rgn_smry", "trends", replace=del_p)
vcf_txt_html = text_items.get_txt_html("rgn_smry", "vcf", replace=del_p)
else:
intro_txt_html = ""
trends_txt_html = ""
vcf_txt_html = ""
# Get file name attributes from the database.
# 4
smrylogger.debug("4 rgn_smry( )|attr_dct: %s", attr_dct)
# Expand USA48 to full region name.
if attr_dct["region"] == "USA48":
region_name = name_dcts.abbrv_to_rgn[attr_dct["region"]]
else:
region_name = attr_dct["region"]
rgn_img = RegionImages()
rgn_img.rgn_smry_images(region_name, attr_dct["year"])
# Create distribution table data as a list.
table_list = create_distr_table_list(attr_dct["region"], attr_dct["year"])
# Create request context from attributes.
dct = rgn_img.attr.dct
for key in attr_dct.keys():
dct[key] = attr_dct[key]
dct["width"] = "1030"
dct["rgn_name"] = attr_dct["region"]
dct["intro_txt"] = str(intro_txt_html)
dct["trends_txt"] = str(trends_txt_html)
dct["vcf_txt"] = str(vcf_txt_html)
dct["form"] = rgn_form
dct["form_help"] = rgn_form.form_help
dct["table_list"] = table_list
rgn_img = None
# Load the region summary template.
rgn_template = loader.get_template("smry/rgn_smry.html")
# Create context and render.
context = RequestContext(request, dct)
response = HttpResponse(rgn_template.render(context))
return response
def cdl(request):
"""
cdl(request)
USDA NASS Cropland Data Layer (CDL)
"""
# smrylogger.debug("CDL VIEW")
# Set attributes.
attr_dct = site_attr.set_attrs(request, "nass_cdl")
# Form with current year.
year_form = YearForm_CDL(
request.POST,
initial={"year": attr_dct["year"], "opacity": attr_dct["opacity"], "dscrpt_txt": attr_dct["dscrpt_txt"]},
)
# 1
# smrylogger.debug("1 cdl( )|year_form.initial: %s", year_form.initial)
if request.method == "POST":
# Create an instance of class YearForm and populate with
# request data.
year_form = YearForm_CDL(request.POST)
if year_form.is_valid():
# Update attributes.
for key in year_form.cleaned_data.keys():
attr_dct[key] = year_form.cleaned_data[key]
# Set attributes in session to dictionary items.
site_attr.set_session_attr(request, attr_dct)
# 2
# smrylogger.debug("2 cdl( )|attr_dct: %s", attr_dct)
# else:
# 3
# smrylogger.debug("3 cdl( )|Warning: year_form is invalid")
else:
# Create an instance of class RegionForm.
year_form = YearForm_CDL(
initial={"year": attr_dct["year"], "opacity": attr_dct["opacity"], "dscrpt_txt": attr_dct["dscrpt_txt"]}
)
# Initialize Earth Engine. The configuration file config.py
# contains credentials.
ee.Initialize(config.EE_CREDENTIALS, config.EE_URL)
# Get color palette.
palette_str = palettes.cdl_palette()
# Derive the image name.
img_name = "USDA/NASS/CDL/" + str(attr_dct["year"])
# 4
# smrylogger.debug("cdl( )|img_name: %s", img_name)
# Get map ID.
img = ee.Image(img_name).select(["cropland"])
mapid = img.getMapId({"min": 0, "max": 255, "palette": palette_str})
# 5
# smrylogger.debug("5 cdl( )|mapid: %s", mapid)
# Get ecoregions map ID.
mapid_eco_rgns = ee_smry.ee_create_ecorgns_map()
# 6
# smrylogger.debug("6 cdl( )|mapid_eco_rgns: %s", mapid_eco_rgns)
# Create request context from attributes.
# Mapid and token for base map.
dct = {"mapid": mapid["mapid"], "token": mapid["token"]}
# Mapid and token for ecoregions FeatureCollection.
dct["mapid_eco_rgns"] = mapid_eco_rgns["mapid"]
dct["token_eco_rgns"] = mapid_eco_rgns["token"]
for key in attr_dct.keys():
dct[key] = attr_dct[key]
# Set opacity attribute.
dct["opacity"] = 0.01 * float(dct["opacity"])
dct["heading"] = "USDA NASS Cropland Data Layer"
dct["form"] = year_form
dct["form_action"] = "smry/cdl/"
dct["form_help"] = year_form.form_help
# 7
# smrylogger.debug("6 cdl( )|dct: %s", dct)
# Load the ee map template.
template = loader.get_template("land_cover/ee_map.html")
# Create context and render.
context = RequestContext(request, dct)
response = HttpResponse(template.render(context))
return response
