Sep. 21-22, 2006v FME Worldwide User Conference - Vancouver

Flexible Extraction and Transformation from ArcSDE to AutoCadUlf Månsson, SWECO Position AB, Sweden

ArcSDE to DWG 2

Flexible extraction and transformation

from ArcSDE to AutoCAD

Ulf Månsson

ArcSDE to DWG 3

www.sweco.se

ArcSDE to DWG 4

www.malmo.se

3:rd city in Sweden: Malmö

1.Stockholm 765 044 2.Gothenburg 481 410 3.Malmö 269 142

ArcSDE to DWG 5

Wanted:

”A flexible (but understandable) FME-approach to extract data from an existing SDE-database

(40-50 tables) to DWG.”

ArcSDE to DWG 6

Background

Everything will change :

The contents The database model

The attributes The coordinate system

ArcSDE to DWG 7

Defining the Output-Schema

Examine existing DWG-files (created with other tools and manually edited)

ArcSDE to DWG 8

Defining the Output-Schema

Create a database with all combinations of format attributes

In FME : DWG to MS ACCESS

ArcSDE to DWG 9

Defining the Input-Schema

Examine existing documentation of the database

Create a database with all combinations of format attributes:

ArcSDE to DWG 10

Transforming the Input to the Output

We have a database with the input schema and the output schema

-How do we define the rules and use them when we have optional attributes and

values ?

(Like ”wildcard” matching).

ArcSDE to DWG 11

Transforming the Input to the Output

Options :

a. Manually using testers/valuemappers etc. in a workbench. - Not very flexible…..

b. Use the ”SchemaMapper”. - Honestly, we could not figure this one out….

ArcSDE to DWG 12

Option C

We dynamically create a key-attribute by using the concatenator

So all the SDE-features will get a ”query-like” attribute

TELLUS_GDBS.LEDNINGAR_PUNKTOBJEKT?Objekttyp=652&Status=&Kvalitetsursprung=2

ArcSDE to DWG 13

We create a table describing the mapping rules:

Then by using a ”joiner” we set the autocad format attributes.

Option C

ArcSDE to DWG 14

Schema - Conclusion

Without changing the workbench the user may select what features should be extracted and how they will be presented in Autocad. This is done by changing the rules in the MS Access database.

ArcSDE to DWG 15

Clipping Data

1. The entire database according to map tiling standards.2. Selected tiles.3. User defined areas.

ArcSDE to DWG 16

Clipping Data

The clipper and fan-out functions are great !

But:

”It is not always a great idea to read all the rows from 50 big SDE-tables,

clipping them by hundreds of tiles and then fan them out in one session…”

ArcSDE to DWG 17

1. The entire database according to map tiling standards.

A shape-file defines the different tiles. The workbench is called by arguments:

We use the ArcSDE-querier to extract one tile at the time.

Clipping Data

ArcSDE to DWG 18

2. Selected tiles. (We just leave those lines with tiles we intend to keep.)

A shape-file defines the different tiles. The workbench is called by arguments:

We use the ArcSDE-querier to extract one tile at the time.

Clipping data

ArcSDE to DWG 19

Clipping Data

3. User defined areas.

Each user keeps a local folder where they can put any shape-file (s)

By calling the workbench by pointing to this folder they can clip with any area.

We use the ArcSDE-querier to extract one tile at the time.

ArcSDE to DWG 20

Conclusion

Two FME Workbench files (.FMW) One Command line file (.BAT) One MS Access Database (.MDB)

It’s a very flexible combination !