Drawings and profile exports#

OpenOHL draws every route of a line as plan and profile: the profile (ground, side ground, required-clearance line, structures, wires by phase, violation markers) and above it the plan, straightened along the route so that it lines up with the profile. The same drawings are written as SVG, DXF, PDF and PNG; the profile's numbers as CSV and XML.

From the command line#

ohl drawing solves the line exactly like ohl line (it takes all of its options: weather cases, terrain, LiDAR, rules…) and then writes the drawings asked for:

ohl drawing examples/synthetic-line/synthetic-line.ohl.json \
  --terrain examples/synthetic-line/synthetic-survey.csv \
  --weather examples/synthetic-line/weather-cases.ohlwc --clearance 7 \
  --route main --format pdf,dxf,csv --page A3 \
  --hscale 1:2000 --vscale 1:500 --from 0+100 --to 1+000 --out drawings

The first weather case is drawn solid, the others dashed (each its own dash pattern, named in the title block).

ohl line --drawings DIR still writes what it always did: an SVG (or SVG sheets with --page) and the profile CSV of every route.

Sheets#

With --page, each route (or its station range) is split at structures: as many whole spans as fit at the horizontal scale, the structure that ends a sheet starting the next one (match lines). A station range starts the first sheet and ends the last one at its stations. Every sheet has its own height range and a title block: logos, line, weather cases, route, sheet n/N, station range and structures, scales, format. A span longer than the sheet, or a profile taller than it, is drawn anyway and reported as a warning: change the scales or the format.

Files#

For route R (R-profile… with --profile-only):

• SVG: true size in mm; wires and ground carry their names as tooltips.
• PDF: vector, true size, one page per sheet; texts in the standard Helvetica fonts (no fonts embedded; characters outside Windows-1252 show as ?); logos embedded as images.
• PNG: the SVG rendered at --dpi, with the computer's fonts. Images are limited to 40 million pixels: larger ones are drawn at a lower resolution (reported).
• DXF (release 12, AC1009, ASCII): a format most CAD programs read; not tried in a given program yet (no DWG file is written). Entities are LINE, POLYLINE, TEXT and CIRCLE on layers OHL_GROUND, OHL_WIRES, OHL_STRUCTURES, OHL_CLEARANCE, OHL_GRID, OHL_TITLE… Colours are the nearest of DXF's indexed colours; dashes are line types OHL_DASH1… R12 has no line weights, true colours or images, so pens become colours only and logos are left out. Three kinds of file:
  • the sheets in mm, as printed (what lies outside the panels is cut away);
  • R-plan-model.dxf: the plan in project coordinates, metres — centreline, structures (a square and the name), wires and markers;
  • R-profile-model.dxf: the profile in model space, x = station, y = height × exaggeration, metres, with its grid and labels. Line type scale and text heights follow the horizontal scale.

Profile CSV#

kind,label,station_m,offset_m,z_m, a row per point, within the station range (lines cut at its ends):

OHL profile XML#

A simple, open format for the same numbers (version 1):

<?xml version="1.0" encoding="UTF-8"?>
<ohlProfile version="1" route="main" name="Main route" length="1260.000"
            from="100.000" to="1000.000" units="m">
  <scales horizontal="2000" vertical="500"/>
  <ground offset="0">
    <run><p s="100.000" z="503.120"/><p s="104.381" z="503.240"/>…</run>
  </ground>
  <ground offset="-10">…</ground>
  <clearance height="7"><run>…</run></clearance>
  <structure id="T2" s="310.000" o="0.000" base="505.000" top="532.000"
             x="…" y="…">
    <attachment s="310.000" o="-3.000" z="531.000"/>
  </structure>
  <wire label="S1 span 0 (C1 L1)" color="#e6194b"><p s="…" o="…" z="…"/>…</wire>
  <wire label="S1 span 0 (C1 L1) — max temperature" color="#e6194b" dash="3 1.5">…</wire>
  <marker label="…" s="…" o="…" z="…"/>
</ohlProfile>

• s station along the route's centreline, o offset from it (right positive), z height, x/y project coordinates; all in metres.
• <ground> and <clearance> hold runs: a run ends where there is no ground surface.
• A <wire> is one span or jumper of one weather case; dash is set for the cases drawn dashed. A wire leaving the station range is cut at its ends (it may then appear as more than one <wire>).

In the desktop app#

File › Export › Drawings… opens a window: route (or every route), formats, sheets (one continuous drawing, or A0–A4 split at structures), horizontal and vertical scale, station range, clearance line, PNG resolution, the profile alone, the other solved weather cases (dashed), and the output folder. Export writes the files in the background with a progress window; the views stay usable and the window stays open for the next export. It draws the weather case shown (solid).

What is not there yet#

• No DWG files (DXF only); DXF has no line weights, true colours or logos.
• The sheet layout and title block are fixed; company templates will come as a layout plugin.
• PDF fonts are not embedded (the standard Helvetica of every PDF reader).