Parcel FabricでParcelを構築する適切な方法はありますか？

WalidAlmasri1

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Parcel Fabricでのparcelの構築は、ここ1年ほど理解しようと試みていることです。自分ではfabric内で直接parcelを移行・構築する能力にはかなり自信がありますが、fabric内で直接構築する際に完全には理解できないプロセスもあります。多くの作業を一から行い、制御点を使って区画やparcelを構築しています。市の境界外のparcelは比較的簡単に構築できます。なぜなら、それらは単なる区画の分割（例：NE四分の西半分）だからです。または、その区画が大規模な分譲地で記録された地図がある場合も同様です。<\/P>

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以下はfabricで一から構築する際に持っているいくつかの質問です：<\/P>

1. 四分区をさらに小さな区画（alioquots）に分割するのは賢明でしょうか？これを行うことで、結合対象となる特定の場所に作業が集中するように感じます。また、alioquot区画が交差する場所にカスタムモニュメントを追加することも（最低でも四分区をさらに四分四分区に分割するなど）考えています。<\/LI>
2. 通行権の献納について - 区画線（例：四分区周囲の30フィートの元々のROW）から構築する方が良いでしょうか？その後、文書や地図による追加のROW献納を埋める形で？道路献納は、すでにfabricに結合されているparcelを横切る場合、本当に複雑になります。<\/LI>
3. Parcel remainder機能 - 区画を多くの等しい部分に細分しない限り、これを使うのは非常に難しいと感じます。これは、両方とも1:100000のミスクローズ比率と1.000000スケールを持つparcelを分割するときだけ完璧に機能します。それ以外の場合、異なるスケールやミスクローズ比率を持つparcelからremainderを作成しようとすると、一見問題なさそうに見える新しいparcelができますが、実際には非常に大きなミスクローズ比率があります。<\/LI>
4. 上記の問題から、これが移行が好まれる理由でしょうか？すべてが1:1になるためです。CADライン内にCOGO寸法を保持しないので、一度移行されるとfabric内のすべてはジオメトリからCOGO寸法が生成されるため完璧と見なされます。もしCOGO属性を管理した場合、これがどのように変わるかはわかりません。<\/LI>
5. fabricにサブレイヤーを追加するにはどうすればよいですか？例えば、Second Divisionsサブレイヤーを追加して半四分区、半区画、alioquotsなどを作成したいです。これらもfabric内で管理したいです。PublicLandSurveyingEditingサンプルfabricにはこれらのレイヤーが存在しているのを見ました。<\/LI>
6. 最小二乗調整（least square adjustment）を実行することは本当に必要ですか？LSAは私には当たり外れがあり、常に何らかの根本的な問題でうまく機能しません。時々parcelが接続されていないというエラーが出ますが、その場所が見つけられません。<\/LI><\/OL>

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   私は本当にparcel fabricの使い方で自分のリズムを見つけようとしていますが、ときどき問題が障害となっているようです。fabric内で直接構築する際の一般的な方向性やプロセスについて教えていただければと思います。<\/P>

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   ありがとうございます<\/P><\/BODY><\/HTML>

WalidAlmasri1

I believe I have figured out how to accurately build a parcel fabric from scratch.  It is necessary to have all your section and quarter sections control points added in the fabric.  Without it, you don’t really have a base to build your fabric.  Side note - I still am curious as to how you go about adding in new sub-layers to the fabric.  If anyone has information regarding this, it would be really helpful!

Beginning with a full section for instance…

1. Using the Cadastral Framework template, build a PLSS Section.  Connect at each section and quarter section monument (I recommend zooming in at each point).  Join the PLSS Section.  You won’t be able to select any monuments to join to in the Join dialog box because the monuments floating in space don’t have any Associated Network PointID’s.

2. Click the Match Control Point button in the Parcel Editor toolbar.  This will bring up the Control dialog window.  Zoom into each section corner (1:1000 or so) and double click the control point.  An Associated Network PointID should be assigned.  Continue doing this to all the control points surrounding the PLSS Section polygon.  Select the polygon using the Select Parcel Features button.  Right click > Rejoin....  Now you can use the Create Join Links button to select the section corners (I always keep Fabric points held fixed, line points move to lines).  X & Y Residuals should be 0.000.  If they aren’t, verify that your PLSS Section snapped to the control point(s).

3. Build your quarter sections using the PLSS Quarter section template.  Join it to the fabric.  At the join dialog window, the center section control point cannot be selected because it doesn’t have an Associated Network PointID.  Join the PLSS Quarter Section to the fabric with the 3 selected control points.  Associate the center control point to the fabric using the steps from above.  Once the center control point is associated, right click the PLSS Quarter Section and rejoin, select that point using the Create Join Link button.  Again, residuals should be 0.000.  Build the other three PLSS Quarter Sections.

4. Once you have created the PLSS Section and PLSS Quarter sections, we can look into how to subdivide.  What I like to do is divide the quarter sections into quarter quarter sections.  I select the PLSS Quarter Section, right click > Construct from Parent.  I continue to use the PLSS Quarter Section template here (I haven’t created a template yet for quarter quarter sections).

   • Using breakline function on the quarter section, I break all 4 boundaries equally by dividing the overall distances by 2.  Connect the points, click the Build Parcels button.

   • I like to place control points at the boundaries of the quarter quarter sections.  Click the Maintain Control Points button, choose the appropriate control point template, zoom close enough to see the lot points and click the lot point.  Click update.  Control points should now be placed and will have Associated Network PointID’s.

5. When it comes to subdividing, I’ve come to the conclusion that before you put in any type of recorded information, it’s important to build all surrounding parcels first.  These are the types of parcels where the description may read: “The west ½ of the northwest ¼ of the northwest ¼ of section X, Township X, range X, excepting the south xyz feet thereof.”   Since we have isolated most of this description in the PLSS layer, we only need to construct the tax parcels.

6. Build all tax parcels using the description above to the centerline of the road.  Why?  Because this will allow you to create your right of way.  Also, because the description above does not describe right of way exceptions.  In this case, right of way is either prescriptive, or dedicated later by a separate document.  I prefer to put a right of way polygon at each tax parcel.  This will save headaches in the future when it comes time for me to associate them to a document.

7. Some parcels (like the one in adjacent to the tract in the images below) are exceptions to the subdivision.  I recommend you traverse those in prior to building the subdivision.  My rational to all of this is that you need to isolate your boundaries for your subdivisions.  If you don’t, more issues will occur.

   • Create a plan for your subdivision and then create a new parcel using the Subdivision template.  Traverse your subdivision boundary and when complete, join its corners to the fabric.  Auto-join any other points found along the boundary.

     • Construction from parent on the subdivision boundary.  Change your template to lots and construct your lots per the recorded information from the subdivision map.

     • Create tax parcels by construction from parent of all the lots.

   • Subdivide any other remaining parts of your quarter quarter section that you isolated.

Now, while there’s a lot more that goes into this than just the steps mentioned above, I believe it’s a good base to get someone started. There are a lot of variables that go into building the fabric.  Most of it you will learn as you repeat the process and find better ways to input data.  I do believe it all begins with subdividing the section down to quarter quarter section level.

If everything is joined properly, you should be able to run least squares adjustment (LSA).  Depending on your residuals, you may need to play with the settings a bit.

Below shows the process of building the parcels.

Step 1:  Isolate quarter quarter section.

Step 2:  Split quarter quarter section into E and W half's (or quarter quarter sections depending on how tax parcels are laid out)

Step 3:  Using property descriptions as described in step 5, construct the tax parcels.  Note that the parcels go to the center of the road.

Step 4: Build exception (upper right parcel).  I had to also construct additional right of day dedications.

Step 5: Construct subdivision boundary

Step 6:  Build lots

Step 7:  Add in remaining record maps, construct right of ways on tax parcels where needed, and construct parcels within the subdivision.