Sep. 21-22, 2006 v FME Worldwide User Conference - Vancouver Flexible Extraction and Transformation...
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Transcript of Sep. 21-22, 2006 v FME Worldwide User Conference - Vancouver Flexible Extraction and Transformation...
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 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.