A flag positroid of ranks $r:=(r_1<\cdots <r_k)$ on $[n]$ is a flag matroid that can be realized by a real $r_k\times n$ matrix $A$ such that the $r_i\times r_i$ minors of $A$ involving rows $1,2,\dots <!--FUNCTION\; APPLICATION-->,r_i$ are nonnegative for all $1\le i\le k$. In this paper we explore the polyhedral and tropical geometry of flag positroids, particularly when $r:=(a,a+1,\dots <!--FUNCTION\; APPLICATION-->,b)$ is a sequence of consecutive numbers. In this case we show that the nonnegative tropical flag variety ${\mathrm{TrFl}<!--FUNCTION\; APPLICATION-->}_{r,n}^{\ge 0}$ equals the nonnegative flag Dressian ${\mathrm{FlDr}<!--FUNCTION\; APPLICATION-->}_{r,n}^{\ge 0}$, and that the points $\mu =({\mu }_a,\dots <!--FUNCTION\; APPLICATION-->,{\mu }_b)$ of ${\mathrm{TrFl}<!--FUNCTION\; APPLICATION-->}_{r,n}^{\ge 0}={\mathrm{FlDr}<!--FUNCTION\; APPLICATION-->}_{r,n}^{\ge 0}$ give rise to coherent subdivisions of the flag positroid polytope $P(\underset{¯}{\mu })$ into flag positroid polytopes. Our results have applications to Bruhat interval polytopes: for example, we show that a complete flag matroid polytope is a Bruhat interval polytope if and only if its $(\le 2)$-dimensional faces are Bruhat interval polytopes. Our results also have applications to realizability questions. We define a positively oriented flag matroid to be a sequence of positively oriented matroids $({\chi }_1,\dots <!--FUNCTION\; APPLICATION-->,{\chi }_k)$ which is also an oriented flag matroid. We then prove that every positively oriented flag matroid of ranks $r=(a,a+1,\dots <!--FUNCTION\; APPLICATION-->,b)$ is realizable.

$[n]$ 上的等级 $r:=(r_1<\cdots <r_k)$ 的标志正仿体是一个标志拟阵，可以通过真实的 $r_k\times n$ 矩阵 $A$ 实现，使得 <涉及行 $1,2,\dots <!--FUNCTION\; APPLICATION-->,r_i$ 的 $A$ 的 b4> 次要元素对于所有 $1\le i\le k$ 都是非负的。在本文中，我们探讨了旗正类的多面体和热带几何形状，特别是当 $r:=(a,a+1,\dots <!--FUNCTION\; APPLICATION-->,b)$ 是连续数字序列时。在本例中，我们表明非负热带旗帜品种 ${\mathrm{TrFl}<!--FUNCTION\; APPLICATION-->}_{r,n}^{\ge 0}$ 等于非负旗帜 Dressian ${\mathrm{FlDr}<!--FUNCTION\; APPLICATION-->}_{r,n}^{\ge 0}$ ，并且 ${\mathrm{TrFl}<!--FUNCTION\; APPLICATION-->}_{r,n}^{\ge 0}={\mathrm{FlDr}<!--FUNCTION\; APPLICATION-->}_{r,n}^{\ge 0}$ 的点 $\mu =({\mu }_a,\dots <!--FUNCTION\; APPLICATION-->,{\mu }_b)$ 产生标志正类多胞体 $P(\underset{¯}{\mu })$ 到标志正类多胞体的连贯细分。我们的结果适用于 Bruhat 区间多胞形：例如，我们表明，完整的旗拟阵多胞形是 Bruhat 区间多胞形当且仅当其 $(\le 2)$ 维面是 Bruhat 区间多胞形。我们的结果也适用于可实现性问题。我们将正向标志拟阵定义为一系列正向拟阵 $({\chi }_1,\dots <!--FUNCTION\; APPLICATION-->,{\chi }_k)$ ，它也是一个有向标志拟阵。然后我们证明每个正向的秩 $r=(a,a+1,\dots <!--FUNCTION\; APPLICATION-->,b)$ 的标志拟阵都是可实现的。