Shape length calculations

• By default all length calculations are performed using TGIS_ShortestPath.RoadLength=GIS_LENGTH. Because the GIS_LENGTH virtual attribute is calculated dynamically using the TGIS_Shape.LengthCS method, it is not the fastest method (particularly if using the Transverse Mercator projection).

• Store pre-computed length as an attribute field and provide it to .RoadLength.
• A computed route between two points contains the shape .Uid as well as computed values for .RoadLength and .RoadName. Speed can be increased by setting .RoadLength='' and .RoadName='' just before calling .Find() (so it will not affect persistent network generation). This is particularly useful on batch calculations and you can always compute those values on your own. (Implemented in build .10363).

Heuristic optimization

• Heuristic optimization (TGIS_ShortestPath.HeuristicCostModifier) is by default zero, which means it is disabled. The general formula for cost modifier will be an average cost for traversing in a straight (as the crow flies) line between the currently evaluated node and the end node. HeuristicCostModifier will be treated as a multiplier for straight distance expressed in meters (for layers with a proper Coordinate System only!).

• Under normal circumstances, HeuristicCostModifier=1 will deliver a significant speed gain. However, it uses the projection code inside.
• If a layer is stored in a meaningful projection (with layer units in meters and not degrees), HeuristicCostModifier can be set to a negative value to turn on projection code to use a simple point-to-point distance calculation. But in this case, be sure that the units used for length (see point "Shape length calculations") matches the units used for heuristic cost calculations. In other words, if your map is in feet, then stay with feet.

Dynamic routing

• Routing stores a persistent network on the disk. Upon the network generation process, events .OnLinkType and .OnLinkCost are raised to allow user defined cost calculations. These events are not called upon actual routing!

Other hints

• A DK developed application that is used only by the employees or members of a company or organization which has licensed the DK. Such application is restricted from use by the general public market by effective means, e.g., license stipulations, password protection, and/or other security features.
• A DK developed application which has some subset of the TatukGIS Editor functionality, but with substantial specialized features which make the product interesting only to a specific market niche, for example architects, farmers, field biologists, surveyors, etc.
• A DK developed general purpose application with similar functionality to the TatukGIS Editor that is widely marketed to GIS users, but priced significantly more expensively than the TatukGIS Editor.

• Provide TatukGIS (e-mail address: sales@tatukgis.com) information to identify the final customer, including organization name, address, name of contact person with the customer organization, contact person e-mail address, etc. Declare the product(s) to be purchased.
  
  If the purchase involves the TatukGIS Developer Kernel product (which is licensed per registered developer), the reseller or the final customer must provide TatukGIS with the name and e-mail address of the developer who will use the product under each license, to enable TatukGIS to accurately register the developer to the license in the TatukGIS system. (The DK licensed user can also be declared after the purchase is completed.)
   
• If this is the reseller’s first business with TatukGIS, set up a user registration (log-in) account in the TatukGIS system for performing the purchase. Provide the reseller name, address, and other information as it should appear on the invoice. Notify TatukGIS when this is done. In some cases (such as a maintenance renewal for an already existing license/customer), TatukGIS must manually prepare the purchase item under the reseller registration account.
   
• Log to the reseller registration account and perform the purchase, using the normal TatukGIS on-line purchase procedure explained in knowledge base item KB10866

WMS server protocol

• The OpenGIS Web Map Service provides a rendered map as an image. To open provide the URL to the WMS server as a GetCapabilites request. For example:
  http://samples.tatukgis.com/TatukGIS_XIS9/Samples/SamplesAPI/Set6/Wms/Wms.aspx?request=GetCapabilities
• Editor/Viewer note: use menu File/Open from web and provide the URL. Menu File/Favorites provides one-click access to several Web Map Services.

WFS server protocol

• The OpenGIS Web Feature Service provides a map as a GML vector layer. To open provide the URL to the WFS server as a GetCapabilites request.
• Editor/Viewer note: use menu File/Open from web and provide the URL.

ERDAS ECWP protocol

• To open data served from an ERDAS map server. To open provide the URL to the ECWP server.
• Editor/Viewer note: use menu File/Open from web and provide the URL link to the service.
• Internet Server note: ECW and ECWP protocol is not supported

Map Tiles

• The Web Map Tiles Service (WMTS,TMS) is a very popular technology that is at the heart of web mapping services such as Bing Maps and Google Maps. While Bing Maps and Google Maps are commercial services with licensing restrictions, other Web Map Tile Services are free resources. Refer to the MapQuest Open Tiles blog.
• Connector files (.TTKWP) to a number of popular tiles are provided in the sample data folder: \Samples\WebServices.

Bing Maps

• Access to Bing Maps is also available through some third party services. See the How to use Bing Maps with TatukGIS products blog.

• Available as of the DK v. 10.2.0 and Editor/Viewer v. 3.5.0.
• A deeper optimization (especially on .NET) will be added later.
• Language specification should be stable.

Logic

• All parameters (except GOTO) are relative and move the “drawing position” cursor along the shape. The X coordinate moves cursor along the shape. The Y coordinate moves curser perpendicularly.
• Drawing can contain as many commands as desired.
• Using GOTO(0) enables drawing over an already drawn line.
• FOR..END loop cannot be embedded into another loop.
• The more complicated the symbol, the slower the drawing speed.

Commands

Values option

Coding

• Values can be separated by space, coma, plus sign, or minus sign.
• Symbol provided adds TGIS_SymbolList. Prepare short start with ‘&’ sign:
    Line.Symbol=&F()DRAW(5 5 5 -5)MOVE(5 0)E()
• All commands can be located in a single line, so code:
    FILL(0 0 20 5 0 -10)                                          
  M(45,0)                                                       
  FOR(-45)                                                      
  DRAW(0,6 6,0 0-6)                                              
  M(10,0)                                                       
  END()                                                         
  GOTO(100%)     
  COLOR(255,0,0)                                              
  FILL(0 0 -20 5 0 -10)                                          
  Can be expressed as:
    I(0+0+20+5+0-10)M(45+0)F(-45)D(0+6+6+0+0-6)M(10+0)E()G(100%)C(255,0,0)I(0+0-20+5+0-10)                                         
   

Example 1

Example 2

Example 3

• The bank (which issued the credit card) uses an automated anti-fraud security system which suspects the use of the credit card in Poland (TatukGIS is located in Poland) might be an unauthorized transaction.
• Your bank or the type of the credit card does not allow foreign and/or internet transactions.
• Internet purchases attempted on that day exceed the credit card’s daily internet transaction limit.
• Purchases attempted on that day exceed the credit card’s total daily transaction limit.
• Purchases attempted during the current billing cycle exceed the credit card’s total credit limit.
• The credit card number was entered incorrectly.
• The year/month of the expiration date was entered incorrectly or in the wrong format.
• Person's name entered does not match the name on the credit card.
• Address entered does not match the billing address of the credit card owner.
• A communication fault, perhaps temporary, between the credit card processing system and your bank prevented presentation of the transaction request to your bank. (If the bank reports no record of an attempted transaction, this is a possible explanation.)

• A secure (encrypted) connection between the eCard web site and the purchaser’s computer, for some reason, could not be established. This might be due to a temporary problem with the internet connection, your web browser security settings…
• The session timed out because the bank did not provide the electronic approval within the allowed time.

• Perform the on-line purchase again a bit later (or the next day).
• Perform the purchase using a different web browser (or different computer).
• Perform the purchase using a different internet connection.