srtm.py/gpx_sample_images.py at master · GeospatialPython/srtm.py · GitHub

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import gpxpy as mod_gpxpy

import cartesius.main as mod_cartesius

import cartesius.charts as mod_charts

import cartesius.elements as mod_elements

import logging as mod_logging

import srtm as mod_srtm

mod_logging.basicConfig(level=mod_logging.DEBUG,

format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s')

def get_line(gpx, color, transparency_mask=None):

def f():

previous_point = None

length = 0

for point in gpx.walk(only_points=True):

if previous_point:

length += previous_point.distance_2d(point)

previous_point = point

yield mod_charts.data(length, point.elevation)

return mod_charts.LineChart(data=f, color=color, transparency_mask=transparency_mask)

def sample_gpx():

return mod_gpxpy.parse(open('sample_files/setnjica-kod-karojbe.gpx'))

coordinate_system = mod_cartesius.CoordinateSystem(bounds=(-300, 6800, -40, 480))

coordinate_system.add(mod_elements.Grid(20, 100))

gpx = sample_gpx()

coordinate_system.add(get_line(gpx, color=(0, 0, 0)))

data = mod_srtm.get_data()

gpx = sample_gpx()

data.add_elevations(gpx)

coordinate_system.add(get_line(gpx, color=(0, 0, 255), transparency_mask=150))

gpx = sample_gpx()

data.add_elevations(gpx, smooth=True)

coordinate_system.add(get_line(gpx, color=(255, 0, 0)))

coordinate_system.add(mod_elements.Axis(horizontal=True, labels=500, points=100))

coordinate_system.add(mod_elements.Axis(vertical=True, labels=100, points=20))

image = coordinate_system.draw(600, 400, antialiasing=True)

#image.show()

image.save('gpx_elevations.png')

srtm.py/gpx_sample_images.py at master · GeospatialPython/srtm.py · GitHub

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