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304 lines
12 KiB
Python
304 lines
12 KiB
Python
import os
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import string
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import re
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#import settings
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import urllib.parse
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# from pathlib import Path
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from PIL import Image, ImageDraw, ImageFont
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from django.http import HttpResponse
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from django.shortcuts import render
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# from django.core.exceptions import ObjectDoesNotExist, MultipleObjectsReturned
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import troggle.settings as settings
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from troggle.core.models.caves import Entrance, Area, SurvexStation, Cave
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from troggle.core.views.caves import caveKey
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from troggle.parsers.survex import MapLocations
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''' Generates the prospecting guide document.
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Also produces the overlay of points on top of a prospecting_image map - to be deleted.
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I have tried to make this work with the version of PIL we have installed but something is missing still.
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'''
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AREANAMES = [
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#('', 'Location unclear'),
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('1a', '1a – Plateau: around Top Camp'),
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('1b', '1b – Western plateau near 182'),
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('1c', '1c – Eastern plateau near 204 walk-in path'),
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('1d', '1d – Further plateau around 76'),
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('2a', '2a – Southern Schwarzmooskogel near 201 path and the Nipple'),
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('2b', '2b – Eishöhle area'),
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('2b or 4 (unclear)', '2b or 4 (unclear)'),
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('2c', '2c – Kaninchenhöhle area'),
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('2d', '2d – Steinbrückenhöhle area'),
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('3', '3 – Bräuning Alm'),
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('4', '4 – Kratzer valley'),
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('5', '5 – Schwarzmoos-Wildensee'),
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('6', '6 – Far plateau'),
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('1626 or 6 (borderline)', '1626 or 6 (borderline)'),
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('7', '7 – Egglgrube'),
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('8a', '8a – Loser south face'),
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('8b', '8b – Loser below Dimmelwand'),
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('8c', '8c – Augst See'),
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('8d', '8d – Loser-Hochganger ridge'),
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('9', '9 – Gschwandt Alm'),
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('10', '10 – Altaussee'),
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('11', '11 – Augstbach')
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]
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def prospecting(request):
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'''This produces the multipage 'prospecting guide' document,
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intended to be printed and carried into the field - in 1999.
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All the formatting and selection clverness is in the template file.
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'''
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areas = []
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for key, name in AREANAMES:
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a = Area.objects.get(short_name = key) # assumes unique
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caves = list(a.cave_set.all())
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caves.sort(key=caveKey)
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areas.append((name, a, caves))
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return render(request, 'prospecting.html', {"areas": areas})
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# Parameters for big map and zoomed subarea maps:
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# big map first (zoom factor ignored)
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# These are the values for the url /prospecting/[mapcode].png
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maps = {
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# id left top right bottom zoom
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# G&K G&K G&K G&K factor
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"all": [33810.4, 85436.5, 38192.0, 81048.2, 0.35,
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"All"],
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"40": [36275.6, 82392.5, 36780.3, 81800.0, 3.0,
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"Eishöhle"],
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"76": [35440.0, 83220.0, 36090.0, 82670.0, 1.3,
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"Eislufthöhle"],
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"204": [36354.1, 84154.5, 37047.4, 83300, 3.0,
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"Steinbrückenhöhle"],
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"tc": [35230.0, 82690.0, 36110.0, 82100.0, 3.0,
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"Near Top Camp"],
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"grieß":
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[36000.0, 86300.0, 38320.0, 84400.0, 4.0,
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"Grießkogel Area"],
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}
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for n in list(maps.keys()):
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L, T, R, B, S, name = maps[n]
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W = (R-L)/2
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H = (T-B)/2
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for i in range(2):
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for j in range(2):
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maps["%s%i%i" % (n, i, j)] = [L + i * W, T - j * H, L + (i + 1) * W, T - (j + 1) * H, S, name]
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# Keys in the order in which we want the maps output
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mapcodes = ["all", "grieß","40", "76", "204", "tc"]
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# Field codes
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L = 0
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T = 1
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R = 2
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B = 3
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ZOOM = 4
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DESC = 5
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SIZE = 5
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areacolours = {
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'1a' : '#00ffff',
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'1b' : '#ff00ff',
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'1c' : '#ffff00',
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'1d' : '#ffffff',
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'2a' : '#ff0000',
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'2b' : '#00ff00',
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'2c' : '#008800',
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'2d' : '#ff9900',
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'3' : '#880000',
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'4' : '#0000ff',
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'6' : '#000000', # doubles for surface fixed pts, and anything else
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'7' : '#808080'
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}
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for FONT in [
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"/usr/share/fonts/truetype/freefont/FreeSans.ttf",
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"/usr/X11R6/lib/X11/fonts/truetype/arial.ttf",
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"/mnt/c/windows/fonts/arial.ttf",
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"C:\WINNT\Fonts\ARIAL.TTF"
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]:
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if os.path.isfile(FONT): break
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TEXTSIZE = 16
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CIRCLESIZE =8
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LINEWIDTH = 2
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myFont = ImageFont.truetype(FONT, TEXTSIZE)
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#print(f' - myFont {myFont} {FONT} {TEXTSIZE}')
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def mungecoord(x, y, mapcode, img):
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# Top of Zinken is 73 1201 = dataset 34542 81967
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# Top of Hinter is 1073 562 = dataset 36670 83317
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# image is 1417 by 2201
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# FACTOR1 = 1000.0 / (36670.0-34542.0)
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# FACTOR2 = (1201.0-562.0) / (83317 - 81967)
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# FACTOR = (FACTOR1 + FACTOR2)/2
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# The factors aren't the same as the scanned map's at a slight angle. I
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# can't be bothered to fix this. Since we zero on the Hinter it makes
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# very little difference for caves in the areas round 76 or 204.
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# xoffset = (x - 36670)*FACTOR
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# yoffset = (y - 83317)*FACTOR
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# return (1073 + xoffset, 562 - yoffset)
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m = maps[mapcode]
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factorX, factorY = img.size[0] / (m[R] - m[L]), img.size[1] / (m[T] - m[B])
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return ((x - m[L]) * factorX, (m[T] - y) * factorY)
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COL_TYPES = {True: "red",
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False: "#dddddd",
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"Reference": "#dddddd"}
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def prospecting_image(request, name):
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'''This draws map outlines on an existing map image.
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But getting the entrances plotted is broken by later changes elsewhere in the system since this code was written.
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SurvexStations are in x=latitude, y=longitude - these are what appear in essentials.gpx
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Entrances are in northing, easting
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which is why we can't simply plot all the Entrances...
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We should replace all this with something that exports an overlay for Google Maps and OpenStreetView
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'''
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mainImage = Image.open(os.path.join(settings.EXPOFILES, "location_maps", "pguidemap.jpg"))
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# if settings.PUBLIC_SITE and not request.user.is_authenticated:
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# mainImage = Image.new("RGB", mainImage.size, '#ffffff')
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m = maps[name]
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imgmaps = []
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if name == "all":
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img = mainImage
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else:
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M = maps['all']
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W, H = mainImage.size
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l = int((m[L] - M[L]) / (M[R] - M[L]) * W)
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t = int((m[T] - M[T]) / (M[B] - M[T]) * H)
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r = int((m[R] - M[L]) / (M[R] - M[L]) * W)
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b = int((m[B] - M[T]) / (M[B] - M[T]) * H)
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img = mainImage.crop((l, t, r, b))
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w = int(round(m[ZOOM] * (m[R] - m[L]) / (M[R] - M[L]) * W))
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h = int(round(m[ZOOM] * (m[B] - m[T]) / (M[B] - M[T]) * H))
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img = img.resize((w, h), Image.BICUBIC)
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draw = ImageDraw.Draw(img)
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#draw.setfont(myFont)
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if name == "all":
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for maparea in list(maps.keys()):
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if maparea == "all":
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continue
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localm = maps[maparea]
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l,t = mungecoord(localm[L], localm[T], "all", img)
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r,b = mungecoord(localm[R], localm[B], "all", img)
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text = maparea + " map"
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textlen = draw.textsize(text)[0] + 3
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draw.rectangle([l, t, l+textlen, t+TEXTSIZE+2], fill='#ffffff')
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draw.text((l+2, t+1), text, fill="#000000", font=myFont)
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imgmaps.append( [l, t, l+textlen, t+SIZE+2, "submap" + maparea, maparea + " subarea map"] )
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draw.line([l, t, r, t], fill='#777777', width=LINEWIDTH)
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draw.line([l, b, r, b], fill='#777777', width=LINEWIDTH)
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draw.line([l, t, l, b], fill='#777777', width=LINEWIDTH)
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draw.line([r, t, r, b], fill='#777777', width=LINEWIDTH)
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draw.line([l, t, l+textlen, t], fill='#777777', width=LINEWIDTH)
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draw.line([l, t+TEXTSIZE+2, l+textlen, t+TEXTSIZE+2], fill='#777777', width=LINEWIDTH)
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draw.line([l, t, l, t+TEXTSIZE+2], fill='#777777', width=LINEWIDTH)
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draw.line([l+textlen, t, l+textlen, t+TEXTSIZE+2], fill='#777777', width=LINEWIDTH)
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#imgmaps[maparea] = []
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# Draw scale bar
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m100 = int(100 / (m[R] - m[L]) * img.size[0])
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draw.line([10, TEXTSIZE*3, 10, TEXTSIZE*2], fill='#000000', width=LINEWIDTH)
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draw.line([10, TEXTSIZE*2, 10+m100, TEXTSIZE*2], fill='#000000', width=LINEWIDTH)
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draw.line([10+m100, TEXTSIZE * 3, 10+m100, TEXTSIZE*2], fill='#000000', width=LINEWIDTH)
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label = "100m"
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draw.text([10 + (m100 - draw.textsize(label)[0]) / 2, TEXTSIZE/2], label, fill='#000000', font=myFont)
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# Draw the circles for known points
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# Northing, Easting, Diameter - but N&E are swapped re database
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for (N, E, D, num) in [(35975.37, 83018.21, 100, "177"), # Calculated from bearings
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(35350.00, 81630.00, 50, "71"), # From Auer map
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(36025.00, 82475.00, 50, "146"), # From mystery map
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(35600.00, 82050.00, 50, "35"), # From Auer map
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(35650.00, 82025.00, 50, "44"), # From Auer map
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(36200.00, 82925.00, 50, "178"), # Calculated from bearings
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(35232.64, 82910.37, 25, "181"), # Calculated from bearings
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(35323.60, 81357.83, 50, "74") # From Auer map
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]:
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(N,E,D) = list(map(float, (N, E, D)))
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maparea = Cave.objects.get(kataster_number = num).getArea().short_name
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lo = mungecoord(N-D, E+D, name, img)
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hi = mungecoord(N+D, E-D, name, img)
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lpos = mungecoord(N-D, E, name, img)
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draw.ellipse([lo,hi], outline="#000000")
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draw.ellipse([lo[0]+1, lo[1]+1, hi[0]-1, hi[1]-1], outline=areacolours[maparea])
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draw.ellipse([lo[0]+2, lo[1]+2, hi[0]-2, hi[1]-2], outline=areacolours[maparea])
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draw.rectangle([lpos[0],lpos[1]-TEXTSIZE/2, lpos[0] + draw.textsize(name)[0], lpos[1]+TEXTSIZE/2], fill="#ffffff")
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draw.text((lpos[0], lpos[1]-TEXTSIZE/2), num, fill="#000000")
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#print(f' CIRCLES - {num} {(N,E,D)}')
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# ml = MapLocations()
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# for p in ml.points():
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# surveypoint, number, point_type, label = p
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# print(f'{surveypoint}, {number}, {point_type}, {label}')
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# plot(surveypoint, number, True, label, name, draw, img)
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# print(f'{name},\n{draw},\n{img}')
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ents = Entrance.objects.all() # only has entrances and fixed points in it these days,
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# but there are only 11 Entrances with northing, easting and a useable tag!
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D = 50
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for e in ents:
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try:
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E, N = e.easting, e.northing
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if e.tag_station:
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st = e.tag_station
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elif e.exact_station:
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st = e.exact_station
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elif e.exact_station:
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st = e.exact_station
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else:
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# print(f' No tag - {e.name} ')
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continue
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if not e.northing:
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continue
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lo = mungecoord(N-D, E+D, st, img)
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hi = mungecoord(N+D, E-D, st, img)
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lpos = mungecoord(N-D, E, st, img)
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draw.ellipse([lo,hi], outline="#000000")
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draw.ellipse([lo[0]+1, lo[1]+1, hi[0]-1, hi[1]-1], outline="#ffffff")
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draw.ellipse([lo[0]+2, lo[1]+2, hi[0]-2, hi[1]-2], outline="#ffffff")
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draw.rectangle([lpos[0],lpos[1]-TEXTSIZE/2, lpos[0] + draw.textsize(st)[0], lpos[1]+TEXTSIZE/2], fill="#ffffff")
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draw.text((lpos[0], lpos[1]-TEXTSIZE/2), num, fill="#000000")
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# draw.ellipse([(x-CIRCLESIZE,y-CIRCLESIZE),(x+CIRCLESIZE,y+CIRCLESIZE)], fill="red", outline="blue")
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# draw.rectangle([(x+CIRCLESIZE, y-TEXTSIZE/2), (x+CIRCLESIZE*2+draw.textsize(shortnumber)[0], y+TEXTSIZE/2)], fill="#ffffff")
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# draw.text((x+CIRCLESIZE * 1.5,y-TEXTSIZE/2), shortnumber, fill="#000000")
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#print(f' SUCCESS - {st} {(E, N)} ')
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except:
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#print(f' FAIL - {st} {(E, N)} ')
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pass
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response = HttpResponse(content_type = "image/png")
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del draw
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img.save(response, "PNG")
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return response
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# def plot(surveypoint, number, point_type, label, mapcode, draw, img):
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# try:
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# ss = SurvexStation.objects.lookup(surveypoint)
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# E, N = ss.x, ss.y
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# shortnumber = number.replace("—","")
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# (x,y) = list(map(int, mungecoord(E, N, mapcode, img)))
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# imgmaps[maparea].append( [x-4, y-SIZE/2, x+4+draw.textsize(shortnumber)[0], y+SIZE/2, shortnumber, label] )
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# draw.rectangle([(x+CIRCLESIZE, y-TEXTSIZE/2), (x+CIRCLESIZE*2+draw.textsize(shortnumber)[0], y+TEXTSIZE/2)], fill="#ffffff")
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# draw.text((x+CIRCLESIZE * 1.5,y-TEXTSIZE/2), shortnumber, fill="#000000")
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# draw.ellipse([(x-CIRCLESIZE,y-CIRCLESIZE),(x+CIRCLESIZE,y+CIRCLESIZE)], fill=COL_TYPES[point_type], outline="#000000")
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# print(f' SUCCESS - YES {surveypoint}, {number}, {point_type}, {label}')
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# except:
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# print(f' - NO {surveypoint}, {number}, {point_type}, {label}')
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# pass
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