ProjectFile.py
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# coding=utf-8
#author: 4N
#createtime: 2021/12/6
#email: nheweijun@sina.com
from app.modules.service.models import TileScheme
from app.util.component.ModelVisitor import ModelVisitor
import json
import base64
class ProjectFile:
@classmethod
def create(cls,para):
if para.get("tile_type").__eq__("WMTS"):
if para.get("scheme"):
tile_scheme = json.loads(para.get("scheme"))
else:
tile_scheme: TileScheme = TileScheme.query.filter_by(guid=para.get("scheme_guid")).one_or_none()
if not tile_scheme:
raise Exception("切片方案不存在！")
tile_scheme = ModelVisitor.object_to_json(tile_scheme)
project_xml_format = '''<?xml version="1.0"?>
<dmap projectname="wmtstest" version="4.0">
<projectCrs>
<spatialrefsys>
<wkt>{wkt}</wkt>
<proj4>{proj4}</proj4>
<srid>{srid}</srid>
<description/>
<projectionacronym/>
</spatialrefsys>
</projectCrs>
<projectlayers>
<maplayer name="{name}" alias="{alias}" type="0">
<extent>
<xmin>{xmin}</xmin>
<ymin>{xmax}</ymin>
<xmax>{xmax}</xmax>
<ymax>{ymax}</ymax>
</extent>
<style>{layer_style}</style>
<format>{layer_format}</format>
<vendor>{vendor}</vendor>
<datasource>{datasource}</datasource>
<tileMatrixSets>
<tileMatrixSet>
<id>default</id>
<crs>{crs}</crs>
<tileCols>{cols}</tileCols>
<tileRows>{rows}</tileRows>
<dpi>{dpi}</dpi>
<tileOrigin>
<X>{x}</X>
<Y>{y}</Y>
</tileOrigin>
<levels>
{levels}
</levels>
</tileMatrixSet>
</tileMatrixSets>
</maplayer>
</projectlayers>
</dmap>
'''
level_each = '''<level>
<id>{lev}</id>
<scaleDenominator>{scale}</scaleDenominator>
<resolution>{resolution}</resolution>
</level>'''
levels = ""
for level in json.loads(tile_scheme.get("levels")):
levels = "{}{}".format(levels, level_each.format(lev=level["level"],
scale=level["scale"],
resolution=level["resolution"],
))
layer_extent = para.get("layer_extent").split(",")
project_xml = project_xml_format.format(wkt="",
proj4="",
srid=para.get("crs").split("::")[-1],
name=para.get("layer_name"),
alias=para.get("alias"),
xmin=layer_extent[0],
xmax=layer_extent[1],
ymin=layer_extent[2],
ymax=layer_extent[3],
layer_style=para.get("layer_style"),
layer_format=para.get("layer_format"),
vendor=para.get("vendor"),
datasource=para.get("datasource"),
crs=para.get("crs"),
cols=tile_scheme.get("cols"),
rows=tile_scheme.get("rows"),
dpi=tile_scheme.get("dpi"),
x=tile_scheme.get("top_left").split(",")[0],
y=tile_scheme.get("top_left").split(",")[1],
levels=levels
)
else:
project_xml_format = '''<?xml version="1.0"?>
<dmap projectname="tmstest" version="4.0">
<projectCrs>
<spatialrefsys>
<wkt>{wkt}</wkt>
<proj4>{proj4}</proj4>
<srid>{srid}</srid>
<description/>
<projectionacronym/>
</spatialrefsys>
</projectCrs>
<projectlayers>
<maplayer name="{name}" alias="{alias}" type="3">
<extent>
<xmin>{xmin}</xmin>
<ymin>{xmax}</ymin>
<xmax>{xmax}</xmax>
<ymax>{ymax}</ymax>
</extent>
<style>{layer_style}</style>
<format>{layer_format}</format>
<vendor>{vendor}</vendor>
<datasource>{datasource}</datasource>
</maplayer>
</projectlayers>
</dmap>
'''
layer_extent = para.get("layer_extent").split(",")
project_xml = project_xml_format.format(wkt="",
proj4="",
srid=para.get("crs").split("::")[-1],
name=para.get("layer_name"),
alias=para.get("alias"),
xmin=layer_extent[0],
xmax=layer_extent[1],
ymin=layer_extent[2],
ymax=layer_extent[3],
layer_style=para.get("layer_style"),
layer_format=para.get("layer_format"),
vendor=para.get("vendor"),
datasource=para.get("datasource"),
)
return str(base64.b64encode(project_xml.encode('utf-8')), encoding="utf8")