[GIS] Printing OpenStreetMap tiles to PDF

openstreetmappdf

What I would like to achieve is an A4 print out of an OSM map with a polygon outline printed on top.

This would come from a web application. Where a user can centre the map, upload a polygon. Which I can do already using Leaflet.js and Mapbox.

I have no idea where to start on this, but I need to take the tiles from the current "view" which would be easy enough, but then I need to scale them, draw the polygon ontop, and then print to a PDF which gets emailed back.

Does anyone have any suggestions on how to achieve this in an automated way?

Best Answer

One approach is to do this on the Client by copying the generated WMS Layers from Open Layers to a HTML5 Canvas.

I have not actually done it yet, but the resultant image could be saved, printed, etc using the standard browser controls.

I know you mention Leaflet, but it may be worth a look ..

A good article on this can be seen Here!

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QGIS Print Quality – Obtaining Print Quality PDF or PNG Output from QGIS

here in my office the solution for press quality maps is to export 300x300px tiff images from print composer. We export only the "core" of the map with the grid and the scale bar. Then in OpenOffice (or LibreOffice) we make the layout and them put the image and print. Very nice results even in A0 maps.
Obs: 4gb of RAM helps a lot.
Obs2: Since Openoffice don't store large images inside the document, if you update the tiff image the map also changes and that is a good tool to create map series. enter image description here

[GIS] Arcpy Creating Multi-page Table/PDF with Reportlab/PyPDF2

I had a similar problem four years ago and worked through it as https://stackoverflow.com/questions/9271370/how-to-repeat-table-column-headings-over-page-breaks-in-pdf-output-from-reportla

The code that I came up with was as below but basically I let ReportLab take care of the page breaks and just threw a table of any length at it:

from reportlab.platypus import SimpleDocTemplate, Table, TableStyle, Paragraph, Frame, Spacer
from reportlab.lib import colors
from reportlab.lib.units import cm
from reportlab.lib.pagesizes import A3, A4, landscape, portrait
from reportlab.lib.styles import ParagraphStyle, getSampleStyleSheet
from reportlab.lib.enums import TA_LEFT, TA_RIGHT, TA_CENTER, TA_JUSTIFY
from reportlab.pdfgen import canvas

pdfReportPages = "C:\\Temp\\test.pdf"
doc = SimpleDocTemplate(pdfReportPages, pagesize=A4)

# container for the "Flowable" objects
elements = []
styles=getSampleStyleSheet()
styleN = styles["Normal"]

# Make heading for each column and start data list
column1Heading = "COLUMN ONE HEADING"
column2Heading = "COLUMN TWO HEADING"
# Assemble data for each column using simple loop to append it into data list
data = [[column1Heading,column2Heading]]
for i in range(1,100):
    data.append([str(i),str(i)])

tableThatSplitsOverPages = Table(data, [6 * cm, 6 * cm], repeatRows=1)
tableThatSplitsOverPages.hAlign = 'LEFT'
tblStyle = TableStyle([('TEXTCOLOR',(0,0),(-1,-1),colors.black),
                       ('VALIGN',(0,0),(-1,-1),'TOP'),
                       ('LINEBELOW',(0,0),(-1,-1),1,colors.black),
                       ('BOX',(0,0),(-1,-1),1,colors.black),
                       ('BOX',(0,0),(0,-1),1,colors.black)])
tblStyle.add('BACKGROUND',(0,0),(1,0),colors.lightblue)
tblStyle.add('BACKGROUND',(0,1),(-1,-1),colors.white)
tableThatSplitsOverPages.setStyle(tblStyle)
elements.append(tableThatSplitsOverPages)

doc.build(elements)

Best Answer

Related Solutions

QGIS Print Quality – Obtaining Print Quality PDF or PNG Output from QGIS

[GIS] Arcpy Creating Multi-page Table/PDF with Reportlab/PyPDF2

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