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DXF to LandXML convertor

Introduction

NRG Surveys develops software for Civil Engineering, our website [login to view URL] presents the various modules that we offer.

The current software has been in development since 1987 and since 1991 has been developed using VB6

We are currently upgrading some of the software using .Net and taking advantage of the improved speed of execution

Project Overview

The module we are currently upgrading is our existing DTM_Map which processes topographic surveys and creates triangle meshes from which it can provide visualisation, contour and calculate volumes. Many of our users also use Autocad and most of the output from the software is to Autocad compatible drawing files. Autocad uses DWG as it’s native format but DWG is not documented and requires a licence from Autocad to use their SDK in reading and writing. We have therefore elected to use DXF which is an industry standard ‘drawing exchange format’ and is well documented with a lot of open source code already available. LandXML is a well documented format and is used widely in Civil Engineering and topographic mapping. A schema is available on the [login to view URL] website

We need to be able to import the points and lines from a DXF file into our object model. However our resources are currently engaged on other aspects of the development and we feel that this element could be contracted out, and since we already import Land XML files we see the opportunity to outsource someone to develop a DXF to XML / XML to DXF convertor

1. File Open

Open and preview DXF file with ability to switch layers on and off with automatic redraw as they are changed, including zoom and pan options on preview.

Import options will be available from the preview window.

2. Units

The units will be specified in the drawing file and the user should have the option to convert into their own units, i.e. Millimetres to Metres, or feet to meters etc.

3. UCS

The DXF file may contain elements which are in a user defined coordinate system, these should be translated to the ‘world’ system on export to XML

4. Elements DXF to XML

DXF element type XML element type

UCS Have to be resolved / transformed prior to XML conversion.

OLE Not supported currently in LandXML

3D Polylines Describe the line style

Assign 3D line to XML file

2D Polylines Describe the line style

Assign 2D line to XML file

Splined lines Would have to be turned into straights at a given interval prior to conversion.

Points PointList2d or PointList3d tags

Blocks Point geometry tag

Arcs Point geometry tag

Ellipses Point geometry tag

3D Faces TIN tag

3D Polymesh TIN tag

Hatching NA

Text Survey//Annotation tag

Text as Spot heights Special case for a 2D drawing which has heights as text on the drawing. A separate option is needed to filter the values of the text and if the values fall within limits set by the user then it is imported as a 3D point at the text insertion position and the user has an option to give the points a global label

5. Converting XML to DXF

The reverse process will be required to convert XML to DXF

XML element type DXF element type

UCS NA

OLE NA

Break lines 3D polyline

Planfeature 2D polyline

Splined lines NA

PointsList 2D / 3D CAD points

Plan feature Block

Arcs NA

Ellipses NA

TIN 3D Faces

Alignment geometry Polylines for straight elements, Arcs for curves. Spirals would have to be broken into straights at a interval provided

Annotation Text.

Skills: .NET, XML, AutoCAD

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About the Employer:
( 0 reviews ) Pebworth, United Kingdom

Project ID: #27372994

8 freelancers are bidding on average £2381 for this job

itgurussoftware

Hello, Trust you are doing great..!!! Definitely, will provide you dedicated developer for your project with 3 Month Free Warranty Support. IT GURUS SOFTWARE Details: Experience: 10+ Years Projects: 450+ Employees: More

£2250 GBP in 40 days
(84 Reviews)
8.3
techplusintl

Hi there, ★★★★★ ASP.NET / XML Expert ★★★★★ I've read requirements and ready to convert DXF to LandXML. 17+ years experience and expertise in : ✔️ CMS (Wordpress, Magento, Shopify, OpenCart, Joomla, Drupal, Prestashop, More

£3000 GBP in 25 days
(3 Reviews)
4.1
greatswork

Hello, I have a real proposal for you. I am an expert in LANDXML format, I know Civil 3D. I have good command of DWG, DXF, SHP, XML. I have work samples and some videos on my profile I have high specialization and ex More

£2250 GBP in 5 days
(6 Reviews)
3.8
jaspune

Hello There, I have been in CAD development domain for over 2 decades. I have worked on format conversions and have good hands on over such activities. Look forward to hear from you Many Thanks

£2750 GBP in 7 days
(3 Reviews)
3.9
r4rony

Hello Greetings We have expertise and the skills in the relevant skills with an experienced team of 50+ developers who will do this job in an excellent manner. We are available to start the work right away and would More

£3000 GBP in 40 days
(2 Reviews)
2.9
Darwish001

I CAN COMPLETE YOUR PROJECT EASILY Hello, I am software developer with enough experiences on C#/.NET, DXF, XML for 13 years. I can work by full time for your project and trying to satisfy the requirements. I am designi More

£1800 GBP in 7 days
(0 Reviews)
4.0
denysbaiurka

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£2000 GBP in 7 days
(0 Reviews)
0.0
gudenets2020

Hi there! I have read your job description carefully so understood what you want. I am a .NET +AutoCAD expert who have rich experience in this field. So i can finish your project perfectly. Please dont hesitate to cona More

£2000 GBP in 12 days
(0 Reviews)
0.0